Changing Array Size

You want to modify the size of an array, either by making it larger or smaller than its current size.

Use array_pad() to make an array grow. To reduce an array, use array_splice().

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="EN" lang="EN">
<head>
<title>PHP</title>
<meta Name="Author" Content="Hann So">
</head>
<body>
<p>
<?php
echo "<p><b>Use array() to create the array fruits.</b></p>";
$fruits = array('Apples', 'Grapes', 'Bananas', 'Oranges', 'Pears');
// use print_r() to print the array
print_r($fruits);
echo "<br />the array size is: ", count($fruits);

// Use array_pad()
echo "<p><b>Use array_pad() to make a six-element array to the right.</b></p>";
$fruits = array_pad($fruits, 6, 'Dates');
print_r($fruits);
echo "<br />the array size is: ", count($fruits);

// Use array_pad()
echo "<p><b>Use array_pad() to make an 8-element array to the left.</b></p>";
$fruits = array_pad($fruits, -8, 'Kiwis');
print_r($fruits);
echo "<br />the array size is: ", count($fruits);

//Shrink to 4 elements using array_splice()
echo "<p><b>Use array_splice() to shrink to 4-element array.</b></p>";
array_splice($fruits, 4);
print_r($fruits);
echo "<br />the array size is: ", count($fruits);

// Remove last element
echo "<p><b>Remove last element.</b></p>";
array_splice($fruits, -1);
print_r($fruits);
echo "<br />the array size is: ", count($fruits);
?>
</p>
</body>
</html>

View the effect


Arrays | What is an array? | Creating Arrays | Iterating | Not Beginning at 0 | Initializing to a Range | Modifying | Removing Elements | Removing Duplicate | Changing Size | Key in an Array | Element in an Array | Position of a Value | Largest or Smallest Element | Reversing | Randomizing
© 2008: Hann So
email: hso@voyager.deanza.edu