3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php function &test($a) { $empty = array(); return isset($a) ? $a : $empty; } function &test2($a) { $empty = array(); return ${isset($a) ? 'a' : 'empty'}; } $test =& test('123'); print_r($test); $test =& test2('123'); print_r($test); $test =& test(NULL); print_r($test); $test =& test2(NULL); print_r($test);
based on 42Cq9
Output for 4.4.0 - 4.4.9, 5.1.0 - 7.2.0
Notice: Only variable references should be returned by reference in /in/b3Dmk on line 5 123123 Notice: Only variable references should be returned by reference in /in/b3Dmk on line 5 Array ( ) Array ( )
Output for 5.0.0 - 5.0.5
Strict Standards: Only variable references should be returned by reference in /in/b3Dmk on line 5 123123 Strict Standards: Only variable references should be returned by reference in /in/b3Dmk on line 5 Array ( ) Array ( )
Output for 4.3.0 - 4.3.11
123123Array ( ) Array ( )