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I'm Rz Rasel
From Bangladesh
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Resizing images with PHP |
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Thursday, April 29, 2010 |
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Resizing images with PHP
The code
/*
* File: SimpleImage.php
* Rz Rasel
*/
class SimpleImage
{
var $image;
var $image_type;
function load($filename)
{
$image_info = getimagesize($filename);
$this->image_type = $image_info[2];
if( $this->image_type == IMAGETYPE_JPEG )
{
$this->image = imagecreatefromjpeg($filename);
}
elseif( $this->image_type == IMAGETYPE_GIF )
{
$this->image = imagecreatefromgif($filename);
}
elseif( $this->image_type == IMAGETYPE_PNG )
{
$this->image = imagecreatefrompng($filename);
}
}
function save($filename, $image_type=IMAGETYPE_JPEG, $compression=75, $permissions=null)
{
if( $image_type == IMAGETYPE_JPEG )
{
imagejpeg($this->image,$filename,$compression);
}
elseif( $image_type == IMAGETYPE_GIF )
{
imagegif($this->image,$filename);
}
elseif( $image_type == IMAGETYPE_PNG )
{
imagepng($this->image,$filename);
}
if( $permissions != null)
{
chmod($filename,$permissions);
}
}
function output($image_type=IMAGETYPE_JPEG)
{
if( $image_type == IMAGETYPE_JPEG )
{
imagejpeg($this->image);
}
elseif( $image_type == IMAGETYPE_GIF )
{
imagegif($this->image);
}
elseif( $image_type == IMAGETYPE_PNG )
{
imagepng($this->image);
}
}
function getWidth() {
return imagesx($this->image);
}
function getHeight() {
return imagesy($this->image);
}
function resizeToHeight($height) {
$ratio = $height / $this->getHeight();
$width = $this->getWidth() * $ratio;
$this->resize($width,$height);
}
function resizeToWidth($width) {
$ratio = $width / $this->getWidth();
$height = $this->getheight() * $ratio;
$this->resize($width,$height);
}
function scale($scale) {
$width = $this->getWidth() * $scale/100;
$height = $this->getheight() * $scale/100;
$this->resize($width,$height);
}
function resize($width,$height) {
$new_image = imagecreatetruecolor($width, $height);
imagecopyresampled($new_image, $this->image, 0, 0, 0, 0, $width, $height, $this->getWidth(), $this->getHeight());
$this->image = $new_image;
}
}
?>
Usage
Save the above file as SimpleImage.php and take a look at the following examples of how to use the script.
The first example below will load a file named picture.jpg resize it to 250 pixels wide and 400 pixels high and resave it as picture2.jpg
include('SimpleImage.php');
$image = new SimpleImage();
$image->load('picture.jpg');
$image->resize(250,400);
$image->save('picture2.jpg');
?>
If you want to resize to a specifed width but keep the dimensions ratio the same then the script can work out the required height for you, just use the resizeToWidth function.
include('SimpleImage.php');
$image = new SimpleImage();
$image->load('picture.jpg');
$image->resizeToWidth(250);
$image->save('picture2.jpg');
?>
You may wish to scale an image to a specified percentage like the following which will resize the image to 50% of its original width and height
include('SimpleImage.php');
$image = new SimpleImage();
$image->load('picture.jpg');
$image->scale(50);
$image->save('picture2.jpg');
?>
You can of course do more than one thing at once. The following example will create two new images with heights of 200 pixels and 500 pixels
include('SimpleImage.php');
$image = new SimpleImage();
$image->load('picture.jpg');
$image->resizeToHeight(500);
$image->save('picture2.jpg');
$image->resizeToHeight(200);
$image->save('picture3.jpg');
?>
The output function lets you output the image straight to the browser without having to save the file. Its useful for on the fly thumbnail generation
header('Content-Type: image/jpeg');
include('SimpleImage.php');
$image = new SimpleImage();
$image->load('picture.jpg');
$image->resizeToWidth(150);
$image->output();
?>
The following example will resize and save an image which has been uploaded via a form
if( isset($_POST['submit']) ) {
include('SimpleImage.php');
$image = new SimpleImage();
$image->load($_FILES['uploaded_image']['tmp_name']);
$image->resizeToWidth(150);
$image->output();
$image->save( rand( 1, 999999 ) . '_rz.jpg');
} else {
?>
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| Problem In Font |
Download then zip file unzip and install in your system. Or normal font file just install in your system font folder. Rz Rasel |
| Bangla Font |
| Bangla Font |
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