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<?php $arr = [ [ "Some key here" => 26542973, "generated key" => "John", "who knows what key" => 10 ], [ "Some key here" => 26542973, "generated key" => "", "who knows what key" => "" ], [ "Some key here" => "", "generated key" => "", "who knows what key" => "" ], ]; $arr = array_filter($arr, function($val){ return implode("", $val); }); print_r($arr);
Output for 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
Array ( [0] => Array ( [Some key here] => 26542973 [generated key] => John [who knows what key] => 10 ) [1] => Array ( [Some key here] => 26542973 [generated key] => [who knows what key] => ) )

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194.1 ms | 404 KiB | 283 Q