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PHP array_unshift() Function

❮ PHP Array Reference

Example

Insert the element "blue" to an array:

<?php
$a=array("a"=>"red","b"=>"green");
array_unshift($a,"blue");
print_r($a);
?>
Try it Yourself »

Definition and Usage

The array_unshift() function inserts new elements to an array. The new array values will be inserted in the beginning of the array.

Tip: You can add one value, or as many as you like.

Note: Numeric keys will start at 0 and increase by 1. String keys will remain the same.


Syntax

array_unshift(array, value1, value2, value3, ...)
Parameter Description
array Required. Specifying an array
value1 Optional. Specifies a value to insert (Required in PHP versions before 7.3)
value2 Optional. Specifies a value to insert
value3 Optional. Specifies a value to insert


Technical Details

Return Value: Returns the new number of elements in the array
PHP Version: 4+
PHP Changelog: PHP 7.3: This function can now be called with only the array parameter

More Examples

Example

Show the return value:

<?php
$a=array("a"=>"red","b"=>"green");
print_r(array_unshift($a,"blue"));
?>
Try it Yourself »

Example

Using numeric keys:

<?php
$a=array(0=>"red",1=>"green");
array_unshift($a,"blue");
print_r($a);
?>
Try it Yourself »

❮ PHP Array Reference