3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function always_false() { return false; } var_dump(empty(always_false()));
Output for 5.5.0 - 7.1.0
bool(true)
Output for 5.2.3 - 5.4.45
Fatal error: Can't use function return value in write context in /in/0qaOt on line 5
Process exited with code 255.
Output for 5.0.0 - 5.2.2
<br /> <b>Fatal error</b>: Can't use function return value in write context in <b>/in/0qaOt</b> on line <b>5</b><br />
Process exited with code 255.
Output for 4.4.2 - 4.4.9
<br /> <b>Parse error</b>: syntax error, unexpected T_STRING, expecting T_VARIABLE or '$' in <b>/in/0qaOt</b> on line <b>5</b><br />
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
<br /> <b>Parse error</b>: parse error, unexpected T_STRING, expecting T_VARIABLE or '$' in <b>/in/0qaOt</b> on line <b>5</b><br />
Process exited with code 255.
Output for 4.3.2 - 4.3.4
<br /> <b>Parse error</b>: parse error, expecting `T_VARIABLE' or `'$'' in <b>/in/0qaOt</b> on line <b>5</b><br />
Process exited with code 255.