The PHP array() function is used to create an array (indexed, associative, or multidimensional).

The PHP array_change_key_case() function changes all keys in an array to lowercase or uppercase.

The PHP array_chunk() function splits an array into chunks of new arrays.

The PHP array_column() function returns the values from a single column in the input array.

The PHP array_combine() function creates an array by using the elements from a “keys” array and a “values” array.

The PHP array_count_values() function counts all the values of an array.

The PHP array_diff() function compares the values of two or more arrays, and returns an array that contains entries from array1 not in the other array(s).

The PHP array_diff_assoc() function compares the keys/values of two or more arrays, and returns an array of entries from array1 not in the other array(s).

The PHP array_diff_key() function compares the keys of two or more arrays, and returns an array of entries from array1 not in the other array(s).

The PHP array_diff_uassoc() function compares the keys/values of two or more arrays, and returns an array of entries from array1 not in the other array(s).

The PHP array_diff_uassoc() function compares the keys of two or more arrays, and returns an array of entries from array1 not in the other array(s).

The PHP array_fill() function fills an array with values.

The PHP array_fill_keys() function fills an array with values, specifying keys.

The PHP array_filter() function filters the values of an array using a callback function, passing each value of the input array to the callback function.

The PHP array_flip() function flips all keys with their associated values in an array.

The PHP array_intersect() function compares the values of two or more arrays, and returns an array of entries from array1 that exist in the other array(s).

The PHP array_intersect_assoc() function compares the keys/values of two or more arrays, and returns entries from array1 that exist in the other array(s).

The PHP array_intersect_key() function compares the keys of two or more arrays, and returns entries from array1 that exist in the other array(s).