(PHP 4 >= 4.0.1, PHP 5, PHP 7) Computes the difference of arrays array array_diff ( array $array1, array $array2 [, array $... ] ) Compares array1 against one or more other arrays and returns the values in array1 that are not present in any of the other arrays. Parameters: array1 The array to compare from array2 An array to compare a

(PHP 5 >= 5.1.0, PHP 7) Computes the difference of arrays using a callback function on the keys for comparison array array_diff_ukey ( array $array1, array $array2 [, array $... ], callable $key_compare_func ) Compares the keys from array1 against the keys from array2 and returns the difference. This function is like array_diff() except the comparison is done on the keys instead of the values. Unlike array_diff_key() a

(PHP 5, PHP 7) Computes the difference of arrays with additional index check which is performed by a user supplied callback function array array_diff_uassoc ( array $array1, array $array2 [, array $... ], callable $key_compare_func ) Compares array1 against array2 and returns the difference. Unlike array_diff() the array keys are used in the comparison. Unlike array_diff_assoc() an user supplied callback function is used f

(PHP 5 >= 5.1.0, PHP 7) Computes the difference of arrays using keys for comparison array array_diff_key ( array $array1, array $array2 [, array $... ] ) Compares the keys from array1 against the keys from array2 and returns the difference. This function is like array_diff() except the comparison is done on the keys instead of the values. Parameters: array1 The array t

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Computes the difference of arrays with additional index check array array_diff_assoc ( array $array1, array $array2 [, array $... ] ) Compares array1 against array2 and returns the difference. Unlike array_diff() the array keys are also used in the comparison. Parameters: array1 The array to compare from array2

(PHP 4, PHP 5, PHP 7) Counts all the values of an array array array_count_values ( array $array ) array_count_values() returns an array using the values of array as keys and their frequency in array as values. Parameters: array The array of values to count Returns: Returns an associative array of values from array as keys and their count as value

(PHP 5, PHP 7) Creates an array by using one array for keys and another for its values array array_combine ( array $keys, array $values ) Creates an array by using the values from the keys array as keys and the values from the values array as the corresponding values. Parameters: keys Array of keys to be used. Illegal values for key will be converted to string.

(PHP 5 >= 5.5.0, PHP 7) Return the values from a single column in the input array array array_column ( array $input, mixed $column_key [, mixed $index_key = null ] ) array_column() returns the values from a single column of the input, identified by the column_key. Optionally, an index_key may be provided to index the values in the returned array by the values from the index_key column of the input array.

(PHP 4 >= 4.2.0, PHP 5, PHP 7) Split an array into chunks array array_chunk ( array $array, int $size [, bool $preserve_keys = false ] ) Chunks an array into arrays with size elements. The last chunk may contain less than size elements. Parameters: array The array to work on size The size of each chunk preserv

(PHP 4 >= 4.2.0, PHP 5, PHP 7) Changes the case of all keys in an array array array_change_key_case ( array $array [, int $case = CASE_LOWER ] ) Returns an array with all keys from array lowercased or uppercased. Numbered indices are left as is. Parameters: array The array to work on case Either CASE_UPPER or CASE_LOWER (default)