3v4l.org

run code in 300+ PHP versions simultaneously
<?php error_reporting( E_ALL ); ini_set( 'display_errors', 1 ); $input = array(); if ( empty( $input['foo'] ) ) { var_dump( "empty" ); } else { var_dump( "error" ); }
Output for 4.3.0, 5.4.38 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.16 - 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 - 8.3.7
string(5) "empty"
Output for 4.3.5 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.37
Warning: ini_set() has been disabled for security reasons in /in/fgOtc on line 4 string(5) "empty"
Output for 4.3.1 - 4.3.4
Warning: ini_set,pcntl_fork,phpinfo() has been disabled for security reasons in /in/fgOtc on line 4 string(5) "empty"
preferences:
208.65 ms | 402 KiB | 312 Q