# Arrays

- Introduction
- Installing/Configuring
  - Requirements
  - Installation
  - Runtime Configuration
  - Resource Types
- Predefined Constants
- Sorting Arrays
- Array Functions
  - array_change_key_case — Changes the case of all keys in an array
  - array_chunk — Split an array into chunks
  - array_column — Return the values from a single column in the input array
  - array_combine — Creates an array by using one array for keys and another for its values
  - array_count_values — Counts all the values of an array
  - array_diff_assoc — Computes the difference of arrays with additional index check
  - array_diff_key — Computes the difference of arrays using keys for comparison
  - array_diff_uassoc — Computes the difference of arrays with additional index check which is performed by a user supplied callback function
  - array_diff_ukey — Computes the difference of arrays using a callback function on the keys for comparison
  - array_diff — Computes the difference of arrays
  - array_fill_keys — Fill an array with values, specifying keys
  - array_fill — Fill an array with values
  - array_filter — Filters elements of an array using a callback function
  - array_flip — Exchanges all keys with their associated values in an array
  - array_intersect_assoc — Computes the intersection of arrays with additional index check
  - array_intersect_key — Computes the intersection of arrays using keys for comparison
  - array_intersect_uassoc — Computes the intersection of arrays with additional index check, compares indexes by a callback function
  - array_intersect_ukey — Computes the intersection of arrays using a callback function on the keys for comparison
  - array_intersect — Computes the intersection of arrays
  - array_key_exists — Checks if the given key or index exists in the array
  - array_key_first — Gets the first key of an array
  - array_key_last — Gets the last key of an array
  - array_keys — Return all the keys or a subset of the keys of an array
  - array_map — Applies the callback to the elements of the given arrays
  - array_merge_recursive — Merge one or more arrays recursively
  - array_merge — Merge one or more arrays
  - array_multisort — Sort multiple or multi-dimensional arrays
  - array_pad — Pad array to the specified length with a value
  - array_pop — Pop the element off the end of array
  - array_product — Calculate the product of values in an array
  - array_push — Push one or more elements onto the end of array
  - array_rand — Pick one or more random keys out of an array
  - array_reduce — Iteratively reduce the array to a single value using a callback function
  - array_replace_recursive — Replaces elements from passed arrays into the first array recursively
  - array_replace — Replaces elements from passed arrays into the first array
  - array_reverse — Return an array with elements in reverse order
  - array_search — Searches the array for a given value and returns the first corresponding key if successful
  - array_shift — Shift an element off the beginning of array
  - array_slice — Extract a slice of the array
  - array_splice — Remove a portion of the array and replace it with something else
  - array_sum — Calculate the sum of values in an array
  - array_udiff_assoc — Computes the difference of arrays with additional index check, compares data by a callback function
  - array_udiff_uassoc — Computes the difference of arrays with additional index check, compares data and indexes by a callback function
  - array_udiff — Computes the difference of arrays by using a callback function for data comparison
  - array_uintersect_assoc — Computes the intersection of arrays with additional index check, compares data by a callback function
  - array_uintersect_uassoc — Computes the intersection of arrays with additional index check, compares data and indexes by separate callback functions
  - array_uintersect — Computes the intersection of arrays, compares data by a callback function
  - array_unique — Removes duplicate values from an array
  - array_unshift — Prepend one or more elements to the beginning of an array
  - array_values — Return all the values of an array
  - array_walk_recursive — Apply a user function recursively to every member of an array
  - array_walk — Apply a user supplied function to every member of an array
  - array — Create an array
  - arsort — Sort an array in reverse order and maintain index association
  - asort — Sort an array and maintain index association
  - compact — Create array containing variables and their values
  - count — Count all elements in an array, or something in an object
  - current — Return the current element in an array
  - each — Return the current key and value pair from an array and advance the array cursor
  - end — Set the internal pointer of an array to its last element
  - extract — Import variables into the current symbol table from an array
  - in_array — Checks if a value exists in an array
  - key_exists — Alias of array_key_exists
  - key — Fetch a key from an array
  - krsort — Sort an array by key in reverse order
  - ksort — Sort an array by key
  - list — Assign variables as if they were an array
  - natcasesort — Sort an array using a case insensitive "natural order" algorithm
  - natsort — Sort an array using a "natural order" algorithm
  - next — Advance the internal pointer of an array
  - pos — Alias of current
  - prev — Rewind the internal array pointer
  - range — Create an array containing a range of elements
  - reset — Set the internal pointer of an array to its first element
  - rsort — Sort an array in reverse order
  - shuffle — Shuffle an array
  - sizeof — Alias of count
  - sort — Sort an array
  - uasort — Sort an array with a user-defined comparison function and maintain index association
  - uksort — Sort an array by keys using a user-defined comparison function
  - usort — Sort an array by values using a user-defined comparison function