Cropping an Image

Copy and paste the following code into your editor and run it (code comments are included).

If you want to see the live result (we believe this is the best way to learn what is the script about), try it here (new window).

The source code

This example takes a local image, crops it and saves the result under a new name.

<html>
<head>
<title>Cropping an image</title>
</head>
<body>
<h1>Crop an image</h1>
<p>
Here is the original image: <a href="orig_image.jpg" target="_blank">Image to crop</a>
</p>
<?
	$filename='orig_image.jpg';

	$array = getimagesize($filename);
	
	$width_orig= $array[0];
	$height_orig= $array[1];

	echo '<p>Width of original image: '.$width_orig.'<br />';
	echo 'Height of original image: '.$height_orig.'</p>';

	/*if width longer than height, we crop the image from the center*/
	if($array[0] > $array[1])
	{
		$width=$array[1];
		$height=$array[1];

		$src_x=round($array[0]/2-$width/2,0);

	}
	else
	{
		/*we take the top of the image and cut the bottom*/
		$height=$array[0];
		$width=$array[0];
		$src_x=0;
	}

	$temp = imagecreatetruecolor($width,$height);
	$image = imagecreatefromjpeg($filename);
	imagecopy($temp,$image,0,0,$src_x,0, $width, $height);
	
	/*create the cropped image and make it 50% of the original quality*/
	imagejpeg($temp,'cropped-orig_image.jpg',50);

	echo '<p>Width of resized image: '.$width.'<br />';
	echo 'Height of resized image: '.$height.'</p>';

?>
<p>Here is the cropped one: <a href="cropped-orig_image.jpg" target="_blank">Cropped Image</a></p>
</body>
</html>

download the file

- there are some functions which require the GD 2.0.1 library or later (2.0.28 or later is recommended);
- you need to have the necessary permissions to be able to write a file on your server (see chmod on linux/unix);
- try this if you wish to verify the GD version: var_dump(gd_info());

You may wish to read additional materials from:
- http://us.php.net/getimagesize
- function.imagecreatetruecolor.php
- function.imagecreatefromjpeg.php
- function.imagecopyresampled.php
- function.imagejpeg.php

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Cropping an Image

Cropping an Image

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