Array Functions

The following built-in functions can be used to process array data in PHP. To learn array syntax, see the Understanding Arrays document.

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_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 two 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 entries 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 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 array 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

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