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546 lines
10 KiB
PHP
546 lines
10 KiB
PHP
--TEST--
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Directly modifying a REFERENCED array when foreach'ing over it while using &$value syntax.
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--FILE--
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<?php
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define('MAX_LOOPS',5);
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function withRefValue($elements, $transform) {
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echo "\n---( Array with $elements element(s): )---\n";
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//Build array:
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for ($i=0; $i<$elements; $i++) {
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$a[] = "v.$i";
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}
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$counter=0;
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$ref = &$a;
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echo "--> State of referenced array before loop:\n";
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var_dump($a);
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echo "--> Do loop:\n";
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foreach ($a as $k=>&$v) {
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echo " iteration $counter: \$k=$k; \$v=$v\n";
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eval($transform);
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$counter++;
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if ($counter>MAX_LOOPS) {
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echo " ** Stuck in a loop! **\n";
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break;
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}
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}
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echo "--> State of array after loop:\n";
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var_dump($a);
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}
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echo "\nPopping elements off end of a referenced array, using &\$value";
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$transform = 'array_pop($a);';
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withRefValue(1, $transform);
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withRefValue(2, $transform);
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withRefValue(3, $transform);
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withRefValue(4, $transform);
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echo "\n\n\nShift elements off start of a referenced array, using &\$value";
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$transform = 'array_shift($a);';
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withRefValue(1, $transform);
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withRefValue(2, $transform);
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withRefValue(3, $transform);
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withRefValue(4, $transform);
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echo "\n\n\nRemove current element of a referenced array, using &\$value";
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$transform = 'unset($a[$k]);';
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withRefValue(1, $transform);
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withRefValue(2, $transform);
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withRefValue(3, $transform);
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withRefValue(4, $transform);
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echo "\n\n\nAdding elements to the end of a referenced array, using &\$value";
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$transform = 'array_push($a, "new.$counter");';
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withRefValue(1, $transform);
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withRefValue(2, $transform);
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withRefValue(3, $transform);
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withRefValue(4, $transform);
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echo "\n\n\nAdding elements to the start of a referenced array, using &\$value";
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$transform = 'array_unshift($a, "new.$counter");';
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withRefValue(1, $transform);
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withRefValue(2, $transform);
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withRefValue(3, $transform);
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withRefValue(4, $transform);
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?>
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--EXPECT--
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Popping elements off end of a referenced array, using &$value
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---( Array with 1 element(s): )---
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--> State of referenced array before loop:
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array(1) {
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[0]=>
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string(3) "v.0"
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}
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--> Do loop:
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iteration 0: $k=0; $v=v.0
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--> State of array after loop:
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array(0) {
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}
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---( Array with 2 element(s): )---
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--> State of referenced array before loop:
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array(2) {
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[0]=>
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string(3) "v.0"
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[1]=>
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string(3) "v.1"
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}
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--> Do loop:
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iteration 0: $k=0; $v=v.0
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--> State of array after loop:
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array(1) {
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[0]=>
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&string(3) "v.0"
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}
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---( Array with 3 element(s): )---
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--> State of referenced array before loop:
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array(3) {
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[0]=>
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string(3) "v.0"
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[1]=>
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string(3) "v.1"
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[2]=>
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string(3) "v.2"
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}
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--> Do loop:
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iteration 0: $k=0; $v=v.0
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iteration 1: $k=1; $v=v.1
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--> State of array after loop:
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array(1) {
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[0]=>
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string(3) "v.0"
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}
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---( Array with 4 element(s): )---
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--> State of referenced array before loop:
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array(4) {
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[0]=>
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string(3) "v.0"
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[1]=>
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string(3) "v.1"
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[2]=>
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string(3) "v.2"
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[3]=>
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string(3) "v.3"
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}
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--> Do loop:
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iteration 0: $k=0; $v=v.0
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iteration 1: $k=1; $v=v.1
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--> State of array after loop:
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array(2) {
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[0]=>
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string(3) "v.0"
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[1]=>
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&string(3) "v.1"
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}
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Shift elements off start of a referenced array, using &$value
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---( Array with 1 element(s): )---
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--> State of referenced array before loop:
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array(1) {
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[0]=>
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string(3) "v.0"
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}
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--> Do loop:
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iteration 0: $k=0; $v=v.0
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--> State of array after loop:
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array(0) {
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}
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---( Array with 2 element(s): )---
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--> State of referenced array before loop:
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array(2) {
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[0]=>
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string(3) "v.0"
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[1]=>
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string(3) "v.1"
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}
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--> Do loop:
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iteration 0: $k=0; $v=v.0
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iteration 1: $k=0; $v=v.1
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--> State of array after loop:
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array(0) {
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}
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---( Array with 3 element(s): )---
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--> State of referenced array before loop:
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array(3) {
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[0]=>
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string(3) "v.0"
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[1]=>
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string(3) "v.1"
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[2]=>
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string(3) "v.2"
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}
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--> Do loop:
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iteration 0: $k=0; $v=v.0
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iteration 1: $k=0; $v=v.1
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iteration 2: $k=0; $v=v.2
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--> State of array after loop:
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array(0) {
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}
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---( Array with 4 element(s): )---
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--> State of referenced array before loop:
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array(4) {
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[0]=>
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string(3) "v.0"
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[1]=>
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string(3) "v.1"
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[2]=>
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string(3) "v.2"
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[3]=>
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string(3) "v.3"
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}
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--> Do loop:
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iteration 0: $k=0; $v=v.0
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iteration 1: $k=0; $v=v.1
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iteration 2: $k=0; $v=v.2
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iteration 3: $k=0; $v=v.3
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--> State of array after loop:
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array(0) {
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}
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Remove current element of a referenced array, using &$value
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---( Array with 1 element(s): )---
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--> State of referenced array before loop:
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array(1) {
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[0]=>
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string(3) "v.0"
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}
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--> Do loop:
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iteration 0: $k=0; $v=v.0
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--> State of array after loop:
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array(0) {
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}
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---( Array with 2 element(s): )---
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--> State of referenced array before loop:
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array(2) {
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[0]=>
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string(3) "v.0"
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[1]=>
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string(3) "v.1"
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}
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--> Do loop:
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iteration 0: $k=0; $v=v.0
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iteration 1: $k=1; $v=v.1
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--> State of array after loop:
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array(0) {
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}
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---( Array with 3 element(s): )---
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--> State of referenced array before loop:
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array(3) {
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[0]=>
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string(3) "v.0"
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[1]=>
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string(3) "v.1"
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[2]=>
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string(3) "v.2"
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}
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--> Do loop:
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iteration 0: $k=0; $v=v.0
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iteration 1: $k=1; $v=v.1
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iteration 2: $k=2; $v=v.2
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--> State of array after loop:
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array(0) {
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}
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---( Array with 4 element(s): )---
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--> State of referenced array before loop:
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array(4) {
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[0]=>
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string(3) "v.0"
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[1]=>
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string(3) "v.1"
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[2]=>
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string(3) "v.2"
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[3]=>
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string(3) "v.3"
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}
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--> Do loop:
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iteration 0: $k=0; $v=v.0
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iteration 1: $k=1; $v=v.1
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iteration 2: $k=2; $v=v.2
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iteration 3: $k=3; $v=v.3
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--> State of array after loop:
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array(0) {
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}
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Adding elements to the end of a referenced array, using &$value
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---( Array with 1 element(s): )---
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--> State of referenced array before loop:
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array(1) {
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[0]=>
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string(3) "v.0"
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}
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--> Do loop:
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iteration 0: $k=0; $v=v.0
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iteration 1: $k=1; $v=new.0
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iteration 2: $k=2; $v=new.1
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iteration 3: $k=3; $v=new.2
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iteration 4: $k=4; $v=new.3
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iteration 5: $k=5; $v=new.4
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** Stuck in a loop! **
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--> State of array after loop:
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array(7) {
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[0]=>
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string(3) "v.0"
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[1]=>
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string(5) "new.0"
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[2]=>
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string(5) "new.1"
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[3]=>
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string(5) "new.2"
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[4]=>
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string(5) "new.3"
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[5]=>
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&string(5) "new.4"
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[6]=>
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string(5) "new.5"
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}
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---( Array with 2 element(s): )---
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--> State of referenced array before loop:
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array(2) {
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[0]=>
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string(3) "v.0"
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[1]=>
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string(3) "v.1"
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}
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--> Do loop:
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iteration 0: $k=0; $v=v.0
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iteration 1: $k=1; $v=v.1
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iteration 2: $k=2; $v=new.0
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iteration 3: $k=3; $v=new.1
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iteration 4: $k=4; $v=new.2
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iteration 5: $k=5; $v=new.3
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** Stuck in a loop! **
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--> State of array after loop:
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array(8) {
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[0]=>
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string(3) "v.0"
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[1]=>
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string(3) "v.1"
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[2]=>
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string(5) "new.0"
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[3]=>
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string(5) "new.1"
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[4]=>
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string(5) "new.2"
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[5]=>
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&string(5) "new.3"
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[6]=>
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string(5) "new.4"
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[7]=>
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string(5) "new.5"
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}
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---( Array with 3 element(s): )---
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--> State of referenced array before loop:
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array(3) {
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[0]=>
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string(3) "v.0"
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[1]=>
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string(3) "v.1"
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[2]=>
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string(3) "v.2"
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}
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--> Do loop:
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iteration 0: $k=0; $v=v.0
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iteration 1: $k=1; $v=v.1
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iteration 2: $k=2; $v=v.2
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iteration 3: $k=3; $v=new.0
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iteration 4: $k=4; $v=new.1
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iteration 5: $k=5; $v=new.2
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** Stuck in a loop! **
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--> State of array after loop:
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array(9) {
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[0]=>
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string(3) "v.0"
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[1]=>
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string(3) "v.1"
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[2]=>
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string(3) "v.2"
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[3]=>
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string(5) "new.0"
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[4]=>
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string(5) "new.1"
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[5]=>
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&string(5) "new.2"
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[6]=>
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string(5) "new.3"
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[7]=>
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string(5) "new.4"
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[8]=>
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string(5) "new.5"
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}
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---( Array with 4 element(s): )---
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--> State of referenced array before loop:
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array(4) {
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[0]=>
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string(3) "v.0"
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[1]=>
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string(3) "v.1"
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[2]=>
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string(3) "v.2"
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[3]=>
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string(3) "v.3"
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}
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--> Do loop:
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iteration 0: $k=0; $v=v.0
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iteration 1: $k=1; $v=v.1
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iteration 2: $k=2; $v=v.2
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iteration 3: $k=3; $v=v.3
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iteration 4: $k=4; $v=new.0
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iteration 5: $k=5; $v=new.1
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** Stuck in a loop! **
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--> State of array after loop:
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array(10) {
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[0]=>
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string(3) "v.0"
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[1]=>
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string(3) "v.1"
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[2]=>
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string(3) "v.2"
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[3]=>
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string(3) "v.3"
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[4]=>
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string(5) "new.0"
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[5]=>
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&string(5) "new.1"
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[6]=>
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string(5) "new.2"
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[7]=>
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string(5) "new.3"
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[8]=>
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string(5) "new.4"
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[9]=>
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string(5) "new.5"
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}
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Adding elements to the start of a referenced array, using &$value
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---( Array with 1 element(s): )---
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--> State of referenced array before loop:
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array(1) {
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[0]=>
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string(3) "v.0"
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}
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--> Do loop:
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iteration 0: $k=0; $v=v.0
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--> State of array after loop:
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array(2) {
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[0]=>
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string(5) "new.0"
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[1]=>
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&string(3) "v.0"
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}
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---( Array with 2 element(s): )---
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--> State of referenced array before loop:
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array(2) {
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[0]=>
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string(3) "v.0"
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[1]=>
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string(3) "v.1"
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}
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--> Do loop:
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iteration 0: $k=0; $v=v.0
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iteration 1: $k=2; $v=v.1
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--> State of array after loop:
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array(4) {
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[0]=>
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string(5) "new.1"
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[1]=>
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string(5) "new.0"
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[2]=>
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string(3) "v.0"
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[3]=>
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&string(3) "v.1"
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}
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---( Array with 3 element(s): )---
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--> State of referenced array before loop:
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array(3) {
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[0]=>
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string(3) "v.0"
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[1]=>
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string(3) "v.1"
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[2]=>
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string(3) "v.2"
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}
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--> Do loop:
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iteration 0: $k=0; $v=v.0
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iteration 1: $k=2; $v=v.1
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iteration 2: $k=4; $v=v.2
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--> State of array after loop:
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array(6) {
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[0]=>
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string(5) "new.2"
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[1]=>
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string(5) "new.1"
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[2]=>
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string(5) "new.0"
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[3]=>
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string(3) "v.0"
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[4]=>
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string(3) "v.1"
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[5]=>
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&string(3) "v.2"
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}
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---( Array with 4 element(s): )---
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--> State of referenced array before loop:
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array(4) {
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[0]=>
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string(3) "v.0"
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[1]=>
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string(3) "v.1"
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[2]=>
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string(3) "v.2"
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[3]=>
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string(3) "v.3"
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}
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--> Do loop:
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iteration 0: $k=0; $v=v.0
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iteration 1: $k=2; $v=v.1
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iteration 2: $k=4; $v=v.2
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iteration 3: $k=6; $v=v.3
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--> State of array after loop:
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array(8) {
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[0]=>
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string(5) "new.3"
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[1]=>
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string(5) "new.2"
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[2]=>
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string(5) "new.1"
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[3]=>
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string(5) "new.0"
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[4]=>
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string(3) "v.0"
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[5]=>
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string(3) "v.1"
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[6]=>
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string(3) "v.2"
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[7]=>
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&string(3) "v.3"
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}
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