3v4l.org

run code in 300+ PHP versions simultaneously
<?php $data = [ ['time_diff' => 178], ['time_diff' => 41], ['time_diff' => 83] ]; usort($data, function ($a, $b) { $a['date_diff'] < $b['date_diff']; }); print_r($data);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Warning: Undefined array key "date_diff" in /in/ceN4O on line 10 Warning: Undefined array key "date_diff" in /in/ceN4O on line 10 Warning: Undefined array key "date_diff" in /in/ceN4O on line 10 Warning: Undefined array key "date_diff" in /in/ceN4O on line 10 Array ( [0] => Array ( [time_diff] => 178 ) [1] => Array ( [time_diff] => 41 ) [2] => Array ( [time_diff] => 83 ) )
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Warning: Undefined array key "date_diff" in /in/ceN4O on line 10 Warning: Undefined array key "date_diff" in /in/ceN4O on line 10 Warning: Undefined array key "date_diff" in /in/ceN4O on line 10 Warning: Undefined array key "date_diff" in /in/ceN4O on line 10 Array ( [0] => Array ( [time_diff] => 178 ) [1] => Array ( [time_diff] => 41 ) [2] => Array ( [time_diff] => 83 ) )
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined index: date_diff in /in/ceN4O on line 10 Notice: Undefined index: date_diff in /in/ceN4O on line 10 Notice: Undefined index: date_diff in /in/ceN4O on line 10 Notice: Undefined index: date_diff in /in/ceN4O on line 10 Array ( [0] => Array ( [time_diff] => 178 ) [1] => Array ( [time_diff] => 41 ) [2] => Array ( [time_diff] => 83 ) )
Output for 7.3.32 - 7.3.33
Array ( [0] => Array ( [time_diff] => 178 ) [1] => Array ( [time_diff] => 41 ) [2] => Array ( [time_diff] => 83 ) )
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Notice: Undefined index: date_diff in /in/ceN4O on line 10 Notice: Undefined index: date_diff in /in/ceN4O on line 10 Notice: Undefined index: date_diff in /in/ceN4O on line 10 Notice: Undefined index: date_diff in /in/ceN4O on line 10 Array ( [0] => Array ( [time_diff] => 83 ) [1] => Array ( [time_diff] => 41 ) [2] => Array ( [time_diff] => 178 ) )

preferences:
175.38 ms | 402 KiB | 182 Q