It Count all elements in an array

Example

<?php
$array = array(PHP,ASP);
echo count($array);
?>

Output

2

it create array containing variables and their values

Example

<?php
echo “<pre>”;
$web  = “PHP”;
$clinet = “Brwoser”;
$vars = array(“clinet”);
$array = compact(“web”, “nothing_here”, $vars);
print_r($array);
?>

Output

Array
(
[web] => PHP
[clinet] => Brwoser
)

It sort an array and maintain index association

Example

<?php
echo “<pre>”;
$array = array(‘PHP’,’ ASP’, ‘JS’,’AS’);
asort($array);
print_r($array);
?>

Output

Array
(
[1] =>  ASP
[3] => AS
[2] => JS
[0] => PHP
)

It sort an array in reverse order and maintain index association

Example

<?php
echo “<pre>”;
$array = array(‘PHP’,’ ASP’, ‘JS’,’AS’);
arsort($array);
print_r($array);
?>

Output

Array
(
[0] => PHP
[2] => JS
[3] => AS
[1] =>  ASP
)

It can be used to create an array

Example

<?php
echo “<pre>”;
$array = array(‘PHP’,’ ASP’, ‘JS’,’AS’);
print_r($array);
?>

Output

Array
(
[0] => PHP
[1] =>  ASP
[2] => JS
[3] => AS
)

It apply a user function to every member of an array

Example

<?php
function func($value,$key){
echo “The key $key has the value $value<br />”;
}
$arr1=array(“p”=>”php”,”a”=>”ASP”);
array_walk($arr1,”func”);
?>

Output

The key p has the value php
The key a has the value ASP

It applay a user function recursively to every member of an array

Example

<?php
function func($value,$key){
echo “The key $key has the value $value<br />”;
}
$arr1=array(“p”=>”php”,”a”=>”ASP”);
$arr2=array($arr1,”1″=>”JS”,”2″=>”VS”);
array_walk_recursive($arr2,”func”);
?>

Output

The key p has the value php
The key a has the value ASP
The key 1 has the value JS
The key 2 has the value VS

It return all the values of an array

Example

<?php
echo “<pre>”;
$array = array(“PHP”, “ASP”);
print_r(array_values($array));
?>

Output

Array
(
[0] => PHP
[1] => ASP
)

It prepend one or more elements to the beginning of an array

Example

<?php
echo “<pre>”;
$array = array(“PHP”, “ASP”);
($array, “JS”, “AS”);
print_r($array);
?>

Output

Array
(
[0] => JS
[1] => AS
[2] => PHP
[3] => ASP
)

It removes duplicate values from an array

<?php
echo “<pre>”;
$array1 = array(“a” => “PHP”, “PHP”, “b” => “ASP”, “ASP”, “JSP”);
print_r(array_unique($array1));
?>

Output

Array
(
[a] => PHP
[b] => ASP
[2] => JSP
)