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run code in 300+ PHP versions simultaneously
<?php function event($name,$cb = null){ static $e = array(); if ( is_callable($cb) ){ empty( $e[$name] ) ? $e[$name] = [$cb] : $e[$name][] = $cb; } elseif ( false === empty($e[$name]) ) { $a = is_array($cb) ? $cb : []; foreach ($e[$name] as $eh) call_user_func_array($eh,$a); } }
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/rHtjg on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/rHtjg on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/rHtjg on line 5
Process exited with code 255.
preferences:
228.75 ms | 401 KiB | 313 Q