diff --git a/Zend/zend_closures.c b/Zend/zend_closures.c
index 629abd43998..494c8892218 100644
--- a/Zend/zend_closures.c
+++ b/Zend/zend_closures.c
@@ -729,6 +729,16 @@ void zend_closure_bind_var(zval *closure_zv, zend_string *var_name, zval *var) /
 }
 /* }}} */
 
+void zend_closure_bind_var_ex(zval *closure_zv, uint32_t offset, zval *val) /* {{{ */
+{
+	zend_closure *closure = (zend_closure *) Z_OBJ_P(closure_zv);
+	HashTable *static_variables = closure->func.op_array.static_variables;
+	zval *var = (zval*)((char*)static_variables->arData + offset);
+	zval_ptr_dtor(var);
+	ZVAL_COPY_VALUE(var, val);
+}
+/* }}} */
+
 /*
  * Local variables:
  * tab-width: 4
diff --git a/Zend/zend_closures.h b/Zend/zend_closures.h
index b55174da086..0b50ef26221 100644
--- a/Zend/zend_closures.h
+++ b/Zend/zend_closures.h
@@ -28,6 +28,7 @@ BEGIN_EXTERN_C()
 
 void zend_register_closure_ce(void);
 void zend_closure_bind_var(zval *closure_zv, zend_string *var_name, zval *var);
+void zend_closure_bind_var_ex(zval *closure_zv, uint32_t offset, zval *val);
 
 extern ZEND_API zend_class_entry *zend_ce_closure;
 
diff --git a/Zend/zend_compile.c b/Zend/zend_compile.c
index 7c63771fed9..8a5d15bfa30 100644
--- a/Zend/zend_compile.c
+++ b/Zend/zend_compile.c
@@ -4247,7 +4247,7 @@ void zend_compile_global_var(zend_ast *ast) /* {{{ */
 }
 /* }}} */
 
-static void zend_compile_static_var_common(zend_ast *var_ast, zval *value, zend_bool by_ref) /* {{{ */
+static void zend_compile_static_var_common(zend_ast *var_ast, zval *value, uint32_t by_ref) /* {{{ */
 {
 	znode var_node;
 	zend_op *opline;
@@ -4274,7 +4274,7 @@ static void zend_compile_static_var_common(zend_ast *var_ast, zval *value, zend_
 		}
 		CG(active_op_array)->static_variables = zend_array_dup(CG(active_op_array)->static_variables);
 	}
-	zend_hash_update(CG(active_op_array)->static_variables, var_name, value);
+	value = zend_hash_update(CG(active_op_array)->static_variables, var_name, value);
 
 	if (zend_string_equals_literal(var_name, "this")) {
 		zend_error_noreturn(E_COMPILE_ERROR, "Cannot use $this as static variable");
@@ -4283,7 +4283,7 @@ static void zend_compile_static_var_common(zend_ast *var_ast, zval *value, zend_
 	opline = zend_emit_op(NULL, ZEND_BIND_STATIC, NULL, &var_node);
 	opline->op1_type = IS_CV;
 	opline->op1.var = lookup_cv(CG(active_op_array), var_name);
-	opline->extended_value = by_ref;
+	opline->extended_value = (uint32_t)((char*)value - (char*)CG(active_op_array)->static_variables->arData) | by_ref;
 }
 /* }}} */
 
@@ -4299,7 +4299,7 @@ void zend_compile_static_var(zend_ast *ast) /* {{{ */
 		ZVAL_NULL(&value_zv);
 	}
 
-	zend_compile_static_var_common(var_ast, &value_zv, 1);
+	zend_compile_static_var_common(var_ast, &value_zv, ZEND_BIND_REF);
 }
 /* }}} */
 
@@ -5672,16 +5672,32 @@ void zend_compile_params(zend_ast *ast, zend_ast *return_type_ast) /* {{{ */
 }
 /* }}} */
 
-static void zend_compile_closure_binding(znode *closure, zend_ast *uses_ast) /* {{{ */
+static void zend_compile_closure_binding(znode *closure, zend_op_array *op_array, zend_ast *uses_ast) /* {{{ */
 {
 	zend_ast_list *list = zend_ast_get_list(uses_ast);
 	uint32_t i;
 
+	if (!list->children) {
+		return;
+	}
+
+	if (!op_array->static_variables) {
+		op_array->static_variables = zend_new_array(8);
+	}
+
+	if (GC_REFCOUNT(op_array->static_variables) > 1) {
+		if (!(GC_FLAGS(op_array->static_variables) & IS_ARRAY_IMMUTABLE)) {
+			GC_DELREF(op_array->static_variables);
+		}
+		op_array->static_variables = zend_array_dup(op_array->static_variables);
+	}
+
 	for (i = 0; i < list->children; ++i) {
 		zend_ast *var_name_ast = list->child[i];
 		zend_string *var_name = zval_make_interned_string(zend_ast_get_zval(var_name_ast));
-		zend_bool by_ref = var_name_ast->attr;
+		uint32_t by_ref = var_name_ast->attr;
 		zend_op *opline;
+		zval *value;
 
 		if (zend_string_equals_literal(var_name, "this")) {
 			zend_error_noreturn(E_COMPILE_ERROR, "Cannot use $this as lexical variable");
@@ -5691,10 +5707,16 @@ static void zend_compile_closure_binding(znode *closure, zend_ast *uses_ast) /*
 			zend_error_noreturn(E_COMPILE_ERROR, "Cannot use auto-global as lexical variable");
 		}
 
+		value = zend_hash_add(op_array->static_variables, var_name, &EG(uninitialized_zval));
+		if (!value) {
+			zend_error_noreturn(E_COMPILE_ERROR,
+				"Cannot use variable $%s twice", ZSTR_VAL(var_name));
+		}
+
 		opline = zend_emit_op(NULL, ZEND_BIND_LEXICAL, closure, NULL);
 		opline->op2_type = IS_CV;
 		opline->op2.var = lookup_cv(CG(active_op_array), var_name);
-		opline->extended_value = by_ref;
+		opline->extended_value = (uint32_t)((char*)value - (char*)op_array->static_variables->arData) | by_ref;
 	}
 }
 /* }}} */
@@ -5708,16 +5730,10 @@ void zend_compile_closure_uses(zend_ast *ast) /* {{{ */
 	for (i = 0; i < list->children; ++i) {
 		zend_ast *var_ast = list->child[i];
 		zend_string *var_name = zend_ast_get_str(var_ast);
-		zend_bool by_ref = var_ast->attr;
+		uint32_t by_ref = var_ast->attr;
 		zval zv;
 		ZVAL_NULL(&zv);
 
-		if (op_array->static_variables
-				&& zend_hash_exists(op_array->static_variables, var_name)) {
-			zend_error_noreturn(E_COMPILE_ERROR,
-				"Cannot use variable $%s twice", ZSTR_VAL(var_name));
-		}
-
 		{
 			int i;
 			for (i = 0; i < op_array->last_var; i++) {
@@ -5996,7 +6012,7 @@ void zend_compile_func_decl(znode *result, zend_ast *ast) /* {{{ */
 	} else {
 		zend_begin_func_decl(result, op_array, decl);
 		if (uses_ast) {
-			zend_compile_closure_binding(result, uses_ast);
+			zend_compile_closure_binding(result, op_array, uses_ast);
 		}
 	}
 
diff --git a/Zend/zend_compile.h b/Zend/zend_compile.h
index e1bb9eb3763..805369edfaa 100644
--- a/Zend/zend_compile.h
+++ b/Zend/zend_compile.h
@@ -970,6 +970,8 @@ static zend_always_inline int zend_check_arg_send_type(const zend_function *zf,
 #define ZEND_RETURN_VAL 0
 #define ZEND_RETURN_REF 1
 
+#define ZEND_BIND_VAL 0
+#define ZEND_BIND_REF 1
 
 #define ZEND_RETURNS_FUNCTION (1<<0)
 #define ZEND_RETURNS_VALUE    (1<<1)
diff --git a/Zend/zend_language_parser.y b/Zend/zend_language_parser.y
index e984d5254e3..c6060dee320 100644
--- a/Zend/zend_language_parser.y
+++ b/Zend/zend_language_parser.y
@@ -1021,7 +1021,7 @@ lexical_var_list:
 
 lexical_var:
 		T_VARIABLE		{ $$ = $1; }
-	|	'&' T_VARIABLE	{ $$ = $2; $$->attr = 1; }
+	|	'&' T_VARIABLE	{ $$ = $2; $$->attr = ZEND_BIND_REF; }
 ;
 
 function_call:
diff --git a/Zend/zend_vm_def.h b/Zend/zend_vm_def.h
index 14dc9e67636..82372fdb917 100644
--- a/Zend/zend_vm_def.h
+++ b/Zend/zend_vm_def.h
@@ -7827,10 +7827,9 @@ ZEND_VM_HANDLER(182, ZEND_BIND_LEXICAL, TMP, CV, REF)
 	USE_OPLINE
 	zend_free_op free_op1, free_op2;
 	zval *closure, *var;
-	zend_string *var_name;
 
 	closure = GET_OP1_ZVAL_PTR(BP_VAR_R);
-	if (opline->extended_value) {
+	if (opline->extended_value & ZEND_BIND_REF) {
 		/* By-ref binding */
 		var = GET_OP2_ZVAL_PTR(BP_VAR_W);
 		if (Z_ISREF_P(var)) {
@@ -7851,8 +7850,7 @@ ZEND_VM_HANDLER(182, ZEND_BIND_LEXICAL, TMP, CV, REF)
 		Z_TRY_ADDREF_P(var);
 	}
 
-	var_name = CV_DEF_OF(EX_VAR_TO_NUM(opline->op2.var));
-	zend_closure_bind_var(closure, var_name, var);
+	zend_closure_bind_var_ex(closure, (opline->extended_value & ~ZEND_BIND_REF), var);
 	ZEND_VM_NEXT_OPCODE();
 }
 
@@ -7878,9 +7876,9 @@ ZEND_VM_HANDLER(183, ZEND_BIND_STATIC, CV, CONST, REF)
 	}
 
 	varname = GET_OP2_ZVAL_PTR(BP_VAR_R);
-	value = zend_hash_find_ex(ht, Z_STR_P(varname), 1);
+	value = (zval*)((char*)ht->arData + (opline->extended_value & ~ZEND_BIND_REF));
 
-	if (opline->extended_value) {
+	if (opline->extended_value & ZEND_BIND_REF) {
 		if (Z_TYPE_P(value) == IS_CONSTANT_AST) {
 			SAVE_OPLINE();
 			if (UNEXPECTED(zval_update_constant_ex(value, EX(func)->op_array.scope) != SUCCESS)) {
diff --git a/Zend/zend_vm_execute.h b/Zend/zend_vm_execute.h
index 523e0985f9e..20c0e672633 100644
--- a/Zend/zend_vm_execute.h
+++ b/Zend/zend_vm_execute.h
@@ -20366,10 +20366,9 @@ static ZEND_OPCODE_HANDLER_RET ZEND_FASTCALL ZEND_BIND_LEXICAL_SPEC_TMP_CV_HANDL
 	USE_OPLINE
 	zend_free_op free_op1;
 	zval *closure, *var;
-	zend_string *var_name;
 
 	closure = _get_zval_ptr_tmp(opline->op1.var, &free_op1 EXECUTE_DATA_CC);
-	if (opline->extended_value) {
+	if (opline->extended_value & ZEND_BIND_REF) {
 		/* By-ref binding */
 		var = _get_zval_ptr_cv_BP_VAR_W(opline->op2.var EXECUTE_DATA_CC);
 		if (Z_ISREF_P(var)) {
@@ -20390,8 +20389,7 @@ static ZEND_OPCODE_HANDLER_RET ZEND_FASTCALL ZEND_BIND_LEXICAL_SPEC_TMP_CV_HANDL
 		Z_TRY_ADDREF_P(var);
 	}
 
-	var_name = CV_DEF_OF(EX_VAR_TO_NUM(opline->op2.var));
-	zend_closure_bind_var(closure, var_name, var);
+	zend_closure_bind_var_ex(closure, (opline->extended_value & ~ZEND_BIND_REF), var);
 	ZEND_VM_NEXT_OPCODE();
 }
 
@@ -42028,9 +42026,9 @@ static ZEND_OPCODE_HANDLER_RET ZEND_FASTCALL ZEND_BIND_STATIC_SPEC_CV_CONST_HAND
 	}
 
 	varname = RT_CONSTANT(opline, opline->op2);
-	value = zend_hash_find_ex(ht, Z_STR_P(varname), 1);
+	value = (zval*)((char*)ht->arData + (opline->extended_value & ~ZEND_BIND_REF));
 
-	if (opline->extended_value) {
+	if (opline->extended_value & ZEND_BIND_REF) {
 		if (Z_TYPE_P(value) == IS_CONSTANT_AST) {
 			SAVE_OPLINE();
 			if (UNEXPECTED(zval_update_constant_ex(value, EX(func)->op_array.scope) != SUCCESS)) {
diff --git a/ext/opcache/Optimizer/zend_dfg.c b/ext/opcache/Optimizer/zend_dfg.c
index 224ea56167a..403ac3c0b34 100644
--- a/ext/opcache/Optimizer/zend_dfg.c
+++ b/ext/opcache/Optimizer/zend_dfg.c
@@ -164,7 +164,7 @@ op1_use:
 							}
 							goto op2_use;
 						case ZEND_BIND_LEXICAL:
-							if ((build_flags & ZEND_SSA_RC_INFERENCE) || opline->extended_value) {
+							if ((build_flags & ZEND_SSA_RC_INFERENCE) || (opline->extended_value & ZEND_BIND_REF)) {
 								goto op2_def;
 							}
 							goto op2_use;
diff --git a/ext/opcache/Optimizer/zend_inference.c b/ext/opcache/Optimizer/zend_inference.c
index 92a4cbeaea2..46749b64c6d 100644
--- a/ext/opcache/Optimizer/zend_inference.c
+++ b/ext/opcache/Optimizer/zend_inference.c
@@ -2824,7 +2824,7 @@ static int zend_update_type_info(const zend_op_array *op_array,
 			break;
 		case ZEND_BIND_STATIC:
 			tmp = MAY_BE_ANY | MAY_BE_ARRAY_KEY_ANY | MAY_BE_ARRAY_OF_ANY | MAY_BE_ARRAY_OF_REF
-				| (opline->extended_value ? MAY_BE_REF : (MAY_BE_RC1 | MAY_BE_RCN));
+				| ((opline->extended_value & ZEND_BIND_REF) ? MAY_BE_REF : (MAY_BE_RC1 | MAY_BE_RCN));
 			UPDATE_SSA_TYPE(tmp, ssa_ops[i].op1_def);
 			break;
 		case ZEND_SEND_VAR:
@@ -2839,7 +2839,7 @@ static int zend_update_type_info(const zend_op_array *op_array,
 			break;
 		case ZEND_BIND_LEXICAL:
 			if (ssa_ops[i].op2_def >= 0) {
-				if (opline->extended_value) {
+				if (opline->extended_value & ZEND_BIND_REF) {
 					tmp = t2 | MAY_BE_REF;
 				} else {
 					tmp = t2 & ~(MAY_BE_RC1|MAY_BE_RCN);
diff --git a/ext/opcache/Optimizer/zend_ssa.c b/ext/opcache/Optimizer/zend_ssa.c
index a18f4a875c0..b4f54264bab 100644
--- a/ext/opcache/Optimizer/zend_ssa.c
+++ b/ext/opcache/Optimizer/zend_ssa.c
@@ -747,7 +747,7 @@ static int zend_ssa_rename(const zend_op_array *op_array, uint32_t build_flags,
 					}
 					break;
 				case ZEND_BIND_LEXICAL:
-					if (opline->extended_value || (build_flags & ZEND_SSA_RC_INFERENCE)) {
+					if ((opline->extended_value & ZEND_BIND_REF) || (build_flags & ZEND_SSA_RC_INFERENCE)) {
 						ssa_ops[k].op2_def = ssa_vars_count;
 						var[EX_VAR_TO_NUM(opline->op2.var)] = ssa_vars_count;
 						ssa_vars_count++;