Bug #51174 [Opn]: error "expected to be a reference" when $this referenced in an array property

Edit report at https://bugs.php.net/bug.php?id=51174&edit=1 ID: 51174 Updated by: cmb@php.net Reported by: skrol29forum at gmail dot com Summary: error "expected to be a reference" when $this referenced in an array property Status: Open Type: Bug Package: Scripting Engine problem Operating System: Win7 PHP Version: 5.3 Block user comment: N Private report: N New Comment: JFTR: the issue has been solved as of PHP 7, see <https://3v4l.org/PSGk9>. Previous Comments: ------------------------------------------------------------------------ [2010-09-15 01:15:35] jeremy at tuxmachine dot com See also bug 50394. ------------------------------------------------------------------------ [2010-07-23 01:43:42] heis dot turtlemad at gmail dot com Same failure running Php5.3.2 on FreeBSD8 david:~>php test.php arg_array[0] is the same instance than $this <br> prop=1 <br> arg_array[0] is the same instance than $this <br> Warning: Parameter 1 to f_test() expected to be a reference, value given in /usr/home/david/test.php on line 15 ------------------------------------------------------------------------ [2010-06-21 00:03:55] felipe@php.net I can reproduce it. array(1) { [0]=> &object(clsTest)#1 (2) { ["prop"]=> int(0) ["arg_array"]=> *RECURSION* } } prop=1 <br> array(1) { [0]=> object(clsTest)#1 (2) { ["prop"]=> int(1) ["arg_array"]=> *RECURSION* } } PHP Warning: Parameter 1 to f_test() expected to be a reference, value given ------------------------------------------------------------------------ [2010-03-01 08:24:57] skrol29forum at gmail dot com I've inverted "Expected result" and "Actual result". ------------------------------------------------------------------------ [2010-03-01 00:08:16] skrol29forum at gmail dot com Description: ------------ When $this is stored by reference in a PHP array, itself stored in a property, then function call_user_func_array() is able to recognize the reference only if called in the same local context where $this is referenced. In other words, the reference seems to be lost for call_user_func_array(). The bug does not occur with PHP 5.2, It does occur with both PHP 5.3.0 and PHP 5.3.1. Not yet tested with PHP 5.3.2 Note that if we use a global variable instead of a property, then the bug does not occur. Reproduce code: --------------- <?php function f_test(&$obj) { $obj->prop++; echo "prop=".$obj->prop." <br>\r\n"; } class clsTest { public $prop = 0; public $arg_array = false; function meth() { if ($this->arg_array===false) $this->arg_array = array(&$this); echo 'arg_array[0] '.(($this->arg_array[0]===$this) ? ' is the same instance' : ' is not the same instance').' than $this'." <br>\r\n"; call_user_func_array('f_test', $this->arg_array); } } $oTest = new clsTest; $oTest->meth(); // OK $oTest->meth(); // ERR ?> Expected result: ---------------- arg_array[0] is the same instance than $this prop=1 arg_array[0] is the same instance than $this Warning: Parameter 1 to f_test() expected to be a reference, value given in D:\www\bug.php on line 14 Actual result: -------------- arg_array[0] is the same instance than $this prop=1 arg_array[0] is the same instance than $this prop=2 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=51174&edit=1