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run code in 150+ php & hhvm versions
Bugs & Features
<?php function isReference(&$xVal) { ob_start(); debug_zval_dump(&$xVal); $dump = ob_get_clean(); preg_match('/refcount\((\d*)\)/',$dump,$matches); if ($matches[1] > 4) { return true; } else { return false; } } $text = 'Anything'; var_dump( isReference(&$text) ); var_dump( isReference($text) );
Output for 5.4.0 - 5.4.25
Fatal error: Call-time pass-by-reference has been removed in /in/j1Vke on line 5
Process exited with code 255.
Output for 5.3.0 - 5.3.29
Deprecated: Call-time pass-by-reference has been deprecated in /in/j1Vke on line 5 Deprecated: Call-time pass-by-reference has been deprecated in /in/j1Vke on line 13 bool(false) bool(false)
Output for 5.2.7 - 5.2.17
Warning: Call-time pass-by-reference has been deprecated in /in/j1Vke on line 5 Warning: Call-time pass-by-reference has been deprecated in /in/j1Vke on line 13 bool(false) bool(false)
Output for 5.2.5 - 5.2.6
Warning: Call-time pass-by-reference has been deprecated; If you would like to pass it by reference, modify the declaration of debug_zval_dump(). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file in /in/j1Vke on line 5 Warning: Call-time pass-by-reference has been deprecated; If you would like to pass it by reference, modify the declaration of isReference(). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file in /in/j1Vke on line 13 bool(false) bool(false)
Output for 5.2.1 - 5.2.4
Warning: Call-time pass-by-reference has been deprecated; If you would like to pass it by reference, modify the declaration of debug_zval_dump(). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file. in /in/j1Vke on line 5 Warning: Call-time pass-by-reference has been deprecated; If you would like to pass it by reference, modify the declaration of isReference(). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file. in /in/j1Vke on line 13 bool(false) bool(false)
Output for 5.0.0 - 5.2.0
Warning: Call-time pass-by-reference has been deprecated - argument passed by value; If you would like to pass it by reference, modify the declaration of debug_zval_dump(). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file. However, future versions may not support this any longer. in /in/j1Vke on line 5 Warning: Call-time pass-by-reference has been deprecated - argument passed by value; If you would like to pass it by reference, modify the declaration of isReference(). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file. However, future versions may not support this any longer. in /in/j1Vke on line 13 bool(false) bool(false)
Output for 4.3.0 - 4.4.9
Warning: Call-time pass-by-reference has been deprecated - argument passed by value; If you would like to pass it by reference, modify the declaration of debug_zval_dump(). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file. However, future versions may not support this any longer. in /in/j1Vke on line 5 Warning: Call-time pass-by-reference has been deprecated - argument passed by value; If you would like to pass it by reference, modify the declaration of isreference(). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file. However, future versions may not support this any longer. in /in/j1Vke on line 13 bool(false) bool(false)