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php-src/tests/lang/foreachLoop.013.phpt

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