This article demonstrate how to add and remove value on start and end of an array using predefined functions of PHP. The four important array functions in PHP are :

1. array_push() : This function is used to add one or more values to the end of an array.

Syntax :
array_push($array, $value1, $value2,.......);

Example:

$colors = array("green","blue","pink");
echo "Array before array_push : ";
print_r($colors);
array_push($colors,"red","black");
print_r($colors);

Output :

Array before array_push :
Array
(
    [0] => green
    [1] => blue
    [2] => pink
)
Array after array_push :
Array
(
    [0] => green
    [1] => blue
    [2] => pink
    [3] => red
    [4] => black
)

2. array_pop() : This function is used to remove the last element from array and returns the removed value.

Syntax: array_pop($array);

Example :

$colors = array("green","blue","pink","red");
echo "Array before array_pop : ";
print_r($colors);
$value = array_pop($colors);
echo "Removed Value : ".$value;
echo "Array after array_pop : ";
print_r($colors);

Output :

Array before array_pop :
Array
(
    [0] => green
    [1] => blue
    [2] => pink
    [3] => red
)
Removed Value : red
Array after array_pop :
Array
(
    [0] => green
    [1] => blue
    [2] => pink
)