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If you have one image file on the server which is like 800 x 600 or more and you want to make 7 copys in diff sizes to display it in various places. creating 7 copys of the image will be over crowding your server space. Use Image Streams to dynamic generate the image.
use this script and pass 3 param :
1. file : <path_to_filename>
2. width : <ma_width_to_reduce>
3. s=1 ( use this for a higher quality)
This code is written using the GD library 1.8. make sure u've got that ext installed.
| <?php
header("Content-Type: image/jpeg");
function getExtension($file){
if(($pos = strrpos($file,"."))!==false)
return strtolower(substr($file,$pos+1,strlen($file)));
}
$filename=$_REQUEST[`file`];
$max_width=$_REQUEST[`width`];
if($_REQUEST[`s`]==`1`) {
$withSampling=true;
}else{
$withSampling=false;
}
// Get new sizes
list($width, $height) = getimagesize($filename);
//-- dont resize if the width of the image is smaller or equal than the new size.
if($max_width!="") {
if($width<=$max_width) $max_width=$width;
$percent = $max_width/$width;
$newwidth = $width * $percent;
$newheight = $height * $percent;
}
// Load
$thumb = imagecreatetruecolor($newwidth, $newheight);
$ext = strtolower(getExtension($filename));
if($ext==`jpg` || $ext==`jpeg`) $source = imagecreatefromjpeg($filename);
if($ext==`gif`) $source = imagecreatefromgif($filename);
if($ext==`png`) $source = imagecreatefrompng($filename);
// Resize
if($withSampling) imagecopyresampled($thumb, $source, 0, 0, 0, 0, $newwidth, $newheight, $width, $height);
else imagecopyresized($thumb, $source, 0, 0, 0, 0, $newwidth, $newheight, $width, $height);
// Output
if($ext==`jpg` || $ext==`jpeg`) imagejpeg($thumb);
if($ext==`gif`) imagegif($thumb);
if($ext==`png`) imagepng($thumb);
imagedestroy($thumb);
?> | |
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