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PHP Array Pop
Posted on: October 23, 2009 at 12:00 AM
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PHP Array Pop - This tutorial covers up an essential function of PHP called array_pop(), array_pop() function is used to pop the last value of an array. Several examples of array_pop() illustrates the use of pop function of PHP.

PHP Array Pop() function

In PHP array_pop() function pop the last element of an array.

General Format

mixed array_pop(array $array)

Parameters 

array $array: Input array

Return Value

Returns the last value of the array

The PHP array_pop() function works same as the pop() function does in a Stack, after poping the first input, it reset  the array pointer. If an array is empty it will return NULL.

Example 1:

<?php

$stack=array("cricket","rugby","soccer","basketball");

echo"<b>Original array before pop function</b><br/>";

print_r($stack);

$game=array_pop($stack);

echo"<br/><b>After using pop() function elements of array is now:</b><br/>";

print_r($stack);

echo"<br/><B>Value of \$game is:</b><br/>";

echo$game;

?>

Output:

Original array before pop function
Array ( [0] => cricket [1] => rugby [2] => soccer [3] => basketball )
After using pop() function elements of array is now:
Array ( [0] => cricket [1] => rugby [2] => soccer )
Value of $game is:
basketball

Example 2:

<?php

$array=array();

echo array_pop($array);

?>

Output:

 

(Blank page. will be displayed as output)

Example 3:

<?php

$array=array(0,1,2,3,4);

echo"<b> Elements of the array are:</b><br/>";

print_r($array);

array_pop($array);

echo"<br/><b> Elements of the array after being poped are:</b><br/>";

print_r($array);

echo"<br/><b> Elements of the array after elements being pushed are:</b><br/>";

array_push($array,55,777);

print_r($array);

echo"<br/><b> Elements of the array after again being poped are:</b><br/>";

array_pop($array);

print_r($array);

?>

Output:

Elements of the array are:
Array ( [0] => 0 [1] => 1 [2] => 2 [3] => 3 [4] => 4 )
Elements of the array after being poped are:
Array ( [0] => 0 [1] => 1 [2] => 2 [3] => 3 )
Elements of the array after elements being pushed are:
Array ( [0] => 0 [1] => 1 [2] => 2 [3] => 3 [4] => 55 [5] => 777 )
Elements of the array after again being poped are:
Array ( [0] => 0 [1] => 1 [2] => 2 [3] => 3 [4] => 55 )

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Posted on: October 23, 2009

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