array_all Checks if all &array; elements satisfy a callback function &reftitle.description; boolarray_all arrayarray callablecallback array_all returns &true;, if the given callback returns &true; for all elements. Otherwise the function returns &false;. &reftitle.parameters; array The &array; that should be searched. callback The callback function to call to check each element, which must be boolcallback mixedvalue mixedkey If this function returns &false;, &false; is returned from array_all and the callback will not be called for further elements. &reftitle.returnvalues; The function returns &true;, if callback returns &true; for all elements. Otherwise the function returns &false;. &reftitle.examples; 'dog', 'b' => 'cat', 'c' => 'cow', 'd' => 'duck', 'e' => 'goose', 'f' => 'elephant' ]; // Check, if all animal names are shorter than 12 letters. var_dump(array_all($array, function (string $value) { return strlen($value) < 12; })); // Check, if all animal names are longer than 5 letters. var_dump(array_all($array, function (string $value) { return strlen($value) > 5; })); // Check, if all array keys are strings. var_dump(array_all($array, function (string $value, $key) { return is_string($key); })); ?> ]]> &example.outputs; &reftitle.seealso; array_any array_filter array_find array_find_key