PHP Arrays Tutorial

PHP provides a large number of array functions.[1] We use a task-oriented approach to organize and present the most commonly used array functions to provide a quick reference and learning tool. We cover the following:

PHP Array Basics
How to add elements to an array.
How to remove elements from an array.
How to add, remove, and/or replace elements in an array using PHP's array_splice function.
How to iterate over arrays using PHP array functions as well as control structures and language constructs.
How to work with multidimensional arrays in PHP.
How to search arrays.
How to sort arrays.
How to fill arrays with values.
How to convert arrays to strings.
How to combine or merge arrays

PHP Array Functions

PHP array functions are listed below with brief descriptions and links to pages with more information and examples.

Function	Description	Page
`array_push`	Add element(s) to the end of an array.	Add
`array_unshift`	Add element(s) to the beginning of an array.	Add
`array_pop`	Remove an element from the end of an array.	Remove
`array_shift`	Remove an element from the beginning of an array.	Remove
`array_splice`	Add, remove, and/or replace element(s) in an array.	Splice
`array_walk`	Apply callback function to each array element.	Iterate
`array_map`	Create new array by applying callback function to each array element.	Iterate
`array_filter`	Create a new array by screening values from the passed array.	Iterate
`sort`, `asort`, ...	Sort arrays. Covers all the PHP sort functions.	Sort
`array_search`	Search for a value in an array; return key of match or false.	Search
`in_array`	Search for a value in an array; return true or false.	Search
`array_keys`	Return an array of keys; optional search value argument.	Search
`array_key_exists`	Search for a key in an array; return true or false.	Search
`array_fill`	Create array and fill elements with value you specify.	Fill
`array_fill_keys`	Create array and fill with keys and values.	Fill
`array_pad`	Copy array and fill to specified length with specified value.	Fill
`range`	Create array and fill with a series of values.	Fill
`implode`	Return a string consisting of array values.	Convert
`array_combine`	Create array using first passed array as keys and second as values.	Combine
`array_merge`	Create array by concatenating values of passed arrays.	Combine

The PHP Manual provides an alphabetized list of the array functions with brief descriptions and links to more details. ^

PHP Arrays Tutorial

PHP Array Functions

PHP Arrays: Tutorial Topics