PHP Array Introduction. The array functions allow you to access and manipulate arrays. Simple and multi-dimensional arrays are supported.

Array Functions. The real strength of PHP arrays are the built-in array functions, like the count() function for counting array items:

The array() function is used to create an array. In PHP, there are three types of arrays: Indexed arrays - Arrays with numeric index; Associative arrays - Arrays with named keys; Multidimensional arrays - Arrays containing one or more arrays

PHP Built-in Functions. PHP has over 1000 built-in functions that can be called directly, from within a script, to perform a specific task. Please check out our PHP reference for a complete overview of the PHP built-in functions.

Array Keys. When creating indexed arrays the keys are given automatically, starting at 0 and increased by 1 for each item, so the array above could also be created with keys:

The pos() function returns the value of the current element in an array. This function is an alias of the current() function. Every array has an internal pointer to its "current" element, which is initialized to the first element inserted into the array. Tip: This function does not move the arrays internal pointer. Related methods:

Returns the last value of array. If array is empty, or is not an array, NULL will be returned. PHP Version: 4+

The array_slice() function returns selected parts of an array. Note: If the array have string keys, the returned array will always preserve the keys (See example 4).

Returns the number of elements in the array: PHP Version: 4+ PHP Changelog: The mode parameter was added in PHP 4.2

The str_replace() function replaces some characters with some other characters in a string. This function works by the following rules: If the string to be searched is an array, it returns an array; If the string to be searched is an array, find and replace is performed with every array element