3v4l.org

run code in 300+ PHP versions simultaneously
<?php function test(){ $caller = debug_backtrace(false); echo '<pre>'; print_r($caller); } function haha(){ test(); } haha();
Output for 5.2.5 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
<pre>Array ( [0] => Array ( [file] => /in/XG5sW [line] => 11 [function] => test [args] => Array ( ) ) [1] => Array ( [file] => /in/XG5sW [line] => 13 [function] => haha [args] => Array ( ) ) )
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.4
Warning: Wrong parameter count for debug_backtrace() in /in/XG5sW on line 3 <pre>

preferences:
281.96 ms | 402 KiB | 456 Q