3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php function a(&a) { $a = 7; } $a = 0; a($a); print_r($a); ?>
Output for 5.4.0 - 5.4.14
Parse error: syntax error, unexpected 'a' (T_STRING), expecting variable (T_VARIABLE) in /in/VkKu9 on line 2
Process exited with code 255.
Output for 5.3.0 - 5.3.24
Parse error: syntax error, unexpected T_STRING, expecting T_VARIABLE in /in/VkKu9 on line 2
Process exited with code 255.