3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function coalesce($default, &...$args) { return current(array_filter($args)) ?: $default; } $e1 = []; $e2 = ''; echo coalesce('default', $e1, $happy, $e2);
based on fcPXD
Output for 5.6.8 - 5.6.28, 7.0.0 - 7.1.0
default
Output for hhvm-3.10.0 - 3.12.0
Fatal error: Parameter $args is both variadic and by reference; this is unsupported in /in/DVnSo on line 4
Process exited with code 255.
Output for 5.4.0 - 5.5.35
Parse error: syntax error, unexpected '.', expecting variable (T_VARIABLE) in /in/DVnSo on line 4
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '.', expecting T_VARIABLE in /in/DVnSo on line 4
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 '.', expecting T_VARIABLE in /in/DVnSo on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_VARIABLE' in /in/DVnSo on line 4
Process exited with code 255.