Microsoft Word - Core PHP Programming Using PHP to Build Dynamic Web Sites

//create test data
$data = array(1,2,3);

//add "start" to beginning of array
$data = array_pad($data, -4, "start");

//add "end" to end of array
$data = array_pad($data, 5, "end");

foreach($data as $value)
{
print("$value
\n");
}
?>

value array_pop(array stack)

The array_pop function returns the last element of an array, removing it from the array
as well. The array_push function compliments it, and array_shift and
array_unshift add and remove elements from the beginning of an array.

<?
//set up an array of color names
$colors = array("red", "blue", "green");

$lastColor = array_pop($colors);
//prints "green"
print($lastColor. "
\n");

//shows that colors contains red, blue
print("

");

print_r($colors);

print("

boolean array_push(array stack, expression entry, ...)

The array_push function adds one or more values to the end of an array. It treats the
array as a stack. Use array_pop to remove elements from the stack. The array_shift
and array_unshift functions add and remove elements to the beginning of an array.

<?
//set up an array of color names
$colors = array("red", "blue", "green");

//push two more color names
array_push($colors, "purple", "yellow");