array_unshift() function in php

array_unshift() function of PHP used to shift the elements of array one position in right means it inserts one or more new elements into the starting of a PHP array.

If the array is an index array then it re-indexed the array from 0. It is an inbuilt function of PHP.

Syntax:

here,

$array is a PHP array and $value1,$value2 and $valueN are values to be added to the $array.

Example 1:

<?php
$arr1=array("FRUIT1"=>"apple","FRUIT2"=>"Mango","FRUIT3"=>"banana","FRUIT4"=>"pear");
echo "<pre>";
echo "Original array ";
print_r($arr1);
array_unshift($arr1,"Guava"); 
echo "After using array_unshift() function";
print_r($arr1);
?>

Output:

Example 2:

<?php
$arr1=array(1,2,3,4,5,6,7,8);
echo "<pre>";
echo "Original array ";
print_r($arr1);
array_unshift($arr1,"0");
echo "After using array_unshift() function ";
print_r($arr1);
?>

Output: