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<?php $lesson = array("143" => array("315", "311", "176", "145"), "13" => array("27", "25") ); $user = array( array("143" => array("145" => "1", "176" => "1")), array("13" => array("25" => "1")) ); $result = array(); foreach($user as $key => $value){ foreach($value as $key2 => $value2){ $result[$key2] = array_diff($lesson[$key2], array_keys($value2)); } } echo '<pre>'; print_r($result); echo '</pre>';
Output for 5.5.0 - 5.5.35, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 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 - 8.1.30, 8.2.0 - 8.2.25, 8.3.0 - 8.3.13
<pre>Array ( [143] => Array ( [0] => 315 [1] => 311 ) [13] => Array ( [0] => 27 ) ) </pre>
preferences:
58.73 ms | 408 KiB | 5 Q