YouTipPHP array_unshift() Function
Example
Insert the element "blue" into the array:
<?php
$a=array("a"=>"red","b"=>"green");
array_unshift($a,"blue");
print_r($a);
?>Definition and Usage
The array_unshift() function inserts new elements to the beginning of an array. The new array values will be inserted in the beginning of the array.
Tip: You can insert one or more values.
Note: Numeric keys will start at 0 and increase by 1. String keys will remain unchanged.
Syntax
array_unshift(array,value1,value2,value3...)| Parameter | Description |
|---|---|
| array | Required. Specifies the array. |
| value1 | Required. Specifies the value to insert. |
| value2 | Optional. Specifies the value to insert. |
| value3 | Optional. Specifies the value to insert. |
Technical Details
| Return Value: | Returns the new number of elements in the array. |
|---|---|
| PHP Version: | 4+ |
More Examples
Example 1
Show the return value:
<?php
$a=array("a"=>"red","b"=>"green");
print_r(array_unshift($a,"blue"));
?>Example 2
Using numeric keys:
<?php
$a=array(0=>"red",1=>"green");
array_unshift($a,"blue");
print_r($a);
?>