PHP Array functions

The PHP array_all() function checks if all elements in an array satisfy a callback condition.

The PHP array_any() function checks if at least one element in an array satisfies a callback condition.

The PHP array_change_key_case() function returns an array with all keys from array changed to lowercase or uppercase.

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

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 one array for keys and another for values.

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

The PHP array_diff() function computes the difference of arrays using values only.

The PHP array_diff_assoc() function compares the values and keys of two (or more) arrays, and returns the differences.

The PHP array_diff_key() function compares the keys of two (or more) arrays, and returns the differences.

The PHP array_diff_uassoc() function compares the values and keys of two (or more) arrays using a user-defined key comparison function, and returns the differences.

The PHP array_diff_ukey() function compares the keys of two (or more) arrays using a user-defined key comparison function, and returns the differences.

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

The PHP array_fill_keys() function fills an array with values, using keys from another array.

The PHP array_filter() function filters array elements using a callback.

The PHP array_find() function returns the first element that satisfies a given callback.

The PHP array_find_key() function returns the key of the first element that satisfies a given callback.

The PHP array_flip() function swaps keys and values in an array.

The PHP array_intersect() function computes the intersection of arrays using values.

The PHP array_intersect_assoc() function compares the values and keys of two (or more) arrays, and returns the matches.

The PHP array_intersect_key() function returns all elements from the first array whose keys are present in all other arrays.

The PHP array_intersect_uassoc() function computes the intersection of arrays with additional index check performed by a user-defined callback function.

The PHP array_intersect_ukey() function computes the intersection of arrays using a user-defined callback to compare keys.

The PHP array_is_list() function checks whether an array has sequential integer keys starting from 0 without gaps.

The PHP array_key_exists() function checks if a key exists in an array.

The PHP array_key_first() function returns the first key of an array without modifying the internal pointer.

The PHP array_key_last() function returns the last key of an array without modifying the internal pointer.

The PHP array_keys() function returns all the keys of an array.

The PHP array_map() function applies a callback to each element of an array.

The PHP array_merge() function merges one or more arrays.

The PHP array_merge_recursive() function merges arrays recursively, combining values with the same keys.

The PHP array_multisort() function sorts multiple arrays or multi-dimensional arrays at once.

The PHP array_pad() function pads an array to the specified length with a given value.

The PHP array_pop() function removes the last element of an array and returns it.

The PHP array_product() function calculates the product of values in an array.

The PHP array_push() function adds one or more elements to the end of an array.

The PHP array_rand() function picks one or more random keys from an array.

The PHP array_reduce() function reduces an array to a single value.

The PHP array_replace() function replaces values from the first array with values from following arrays.

The PHP array_replace_recursive() function replaces values recursively in multi-dimensional arrays.

The PHP array_reverse() function returns an array with elements in reverse order.

The PHP array_search() function searches for a value in an array and returns the corresponding key.

The PHP array_shift() function removes the first element from an array and returns it. Numeric keys are reindexed.

The PHP array_slice() function extracts a portion of an array.

The PHP array_splice() function removes or replaces elements in an array.

The PHP array_sum() function calculates the sum of values in an array.

The PHP array_udiff() function computes the difference of arrays using a user-defined comparison function for values.

The PHP array_udiff_assoc() function computes the difference of arrays using a user-defined callback for value comparison and also checks keys.

The PHP array_udiff_uassoc() function computes the difference of arrays using user-defined callbacks for both value and key comparison.

The PHP array_uintersect() function computes the intersection of arrays using a user-defined comparison function for values.

The PHP array_uintersect_assoc() function computes the intersection of arrays with additional index check and uses a user-defined comparison function for values.

The PHP array_uintersect_uassoc() function computes the intersection of arrays using user-defined callbacks for both value and key comparison.

The PHP array_unique() function removes duplicate values from an array.

The PHP array_unshift() function prepends one or more elements to the beginning of an array.

The PHP array_values() function returns all the values of an array and reindexes it.

The PHP array_walk() function applies a callback to each element of an array.

The PHP array_walk_recursive() function applies a callback to each element of an array recursively.

The PHP arsort() function sorts an array in descending order while maintaining index association.

The PHP count() function counts the number of elements in an array or Countable object.

The PHP in_array() function checks if a value exists in an array.

The PHP sizeof() function is an alias of count() and returns the number of elements in an array or Countable object.

The PHP uasort() function sorts an array by values while preserving keys.

The PHP uksort() function sorts an array by keys using a custom comparison function.

The PHP usort() function sorts an array by values using a custom comparison function.