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<?php declare(strict_types=1); error_reporting(-1); ini_set('display_errors', 'On'); $array = [ 'Alex' => [ [ ['event' => 'eventName1'],['event' => 'eventName2'] ], [ ['event' => 'eventName3'],['event' => 'eventName4'] ], [ ['event' => 'eventName5'],['event' => 'eventName6'] ], [ ['event' => 'eventName7'],['event' => 'eventName8'] ], [], [], [] ], 'christoper'=>[ [],[],[],[],[],[],[] ] ]; $output = array_filter($array, function (array $studentDays) { foreach ($studentDays as $day) { if (! empty($day)) { return true; } } return false; }); print_r($output);
Output for 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Array ( [Alex] => Array ( [0] => Array ( [0] => Array ( [event] => eventName1 ) [1] => Array ( [event] => eventName2 ) ) [1] => Array ( [0] => Array ( [event] => eventName3 ) [1] => Array ( [event] => eventName4 ) ) [2] => Array ( [0] => Array ( [event] => eventName5 ) [1] => Array ( [event] => eventName6 ) ) [3] => Array ( [0] => Array ( [event] => eventName7 ) [1] => Array ( [event] => eventName8 ) ) [4] => Array ( ) [5] => Array ( ) [6] => Array ( ) ) )
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 Array ( [Alex] => Array ( [0] => Array ( [0] => Array ( [event] => eventName1 ) [1] => Array ( [event] => eventName2 ) ) [1] => Array ( [0] => Array ( [event] => eventName3 ) [1] => Array ( [event] => eventName4 ) ) [2] => Array ( [0] => Array ( [event] => eventName5 ) [1] => Array ( [event] => eventName6 ) ) [3] => Array ( [0] => Array ( [event] => eventName7 ) [1] => Array ( [event] => eventName8 ) ) [4] => Array ( ) [5] => Array ( ) [6] => Array ( ) ) )

preferences:
188.27 ms | 405 KiB | 212 Q