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run code in 200+ php & hhvm versions
Bugs & Features
<?php function foo(&$arg) { echo "hi\n"; var_dump($arg); } $a = 'bar'; $b =& $a; call_user_func_array('foo', [$b]); call_user_func_array('foo', [&$a]);
based on tDBN8
Output for 7.1.0 - 7.2.6
Warning: Parameter 1 to foo() expected to be a reference, value given in /in/ZDO3o on line 11 hi string(3) "bar" hi string(3) "bar"
Output for 7.0.0 - 7.0.20
Warning: Parameter 1 to foo() expected to be a reference, value given in /in/ZDO3o on line 11 hi string(3) "bar"
Output for 5.4.0 - 5.6.28
hi string(3) "bar" hi string(3) "bar"
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/ZDO3o on line 11
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/ZDO3o on line 11
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/ZDO3o on line 11
Process exited with code 255.