Forum Moderators: coopster
It works by placing it into the same directory as the image file. So in the
/images/ directory, you would have image.jpg and lets call the script rezize.php
So instead of calling /images/image.jpg directly, you can resize it by calling images/resize.php/image.jpg?resize(200x200)
This will resize the image to 200x200. You can also just use resize(200) to make it a max width of 200, keeping the dimentions the same.
What i need though is a max aspect command. Meaning i want to rezise the image to no more then 200px either way, while maintaining the proportions.
heres resize.php;
<?php
// === CONFIGURATION =====================================================
// location of source images (no trailing /)
$image_path = '.';// location of cached images (no trailing /)
$cache_path = '.';
// location of imagemagick's convert utility
$convert_path = 'convert';
// === CHECK INPUT =======================================================
// first, check if an image location is given
if (!isset($_SERVER['PATH_INFO'])) {
die('ERROR: No image specified.');
}
$image = $image_path.$_SERVER['PATH_INFO'];
// next, check if the file exists
if (!file_exists($image)) {
die('ERROR: That image does not exist.');
}
// === PARSE COMMANDS ====================================================
// extract the commands from the query string
// eg.:?resize(....)+flip+blur(...)
preg_match_all('/\+*(([a-z]+)(\(([^\)]*)\))?)\+*/',
$_SERVER['QUERY_STRING'],
$matches, PREG_SET_ORDER);
// concatenate commands for use in cache file name
$cache = $_SERVER['PATH_INFO'];
foreach ($matches as $match) {
$cache .= '%'.$match[2].':'.$match[4];
}
$cache = str_replace('/','_',$cache);
$cache = $cache_path.'/'.$cache;
$cache = escapeshellcmd($cache);
// === RUN CONVERT =======================================================
if (!file_exists($cache)) {
// there is no cached image yet, so we'll need to create it first
// convert query string to an imagemagick command string
$commands = '';
foreach ($matches as $match) {
// $match[2] is the command name
// $match[4] the parameter
// check input
if (!preg_match('/^[a-z]+$/',$match[2])) {
die('ERROR: Invalid command.');
}
if (!preg_match('/^[a-z0-9\/{}+-<>!@%]+$/',$match[4])) {
die('ERROR: Invalid parameter.');
}
// replace } with >, { with <
// > and < could give problems when using html
$match[4] = str_replace('}','>',$match[4]);
$match[4] = str_replace('{','<',$match[4]);
// check for special, scripted commands
switch ($match[2]) {
case 'colorizehex':
// imagemagick's colorize, but with hex-rgb colors
// convert to decimal rgb
$r = round((255 - hexdec(substr($match[4], 0, 2))) / 2.55);
$g = round((255 - hexdec(substr($match[4], 2, 2))) / 2.55);
$b = round((255 - hexdec(substr($match[4], 4, 2))) / 2.55);
// add command to list
$commands .= ' -colorize "'."$r/$g/$b".'"';
break;
case 'part':
// crops the image to the requested size
if (!preg_match('/^[0-9]+x[0-9]+$/',$match[4])) {
die('ERROR: Invalid parameter.');
}
list($width, $height) = explode('x', $match[4]);
// get size of the original
$imginfo = getimagesize($image);
$orig_w = $imginfo[0];
$orig_h = $imginfo[1];
// resize image to match either the new width
// or the new height
// if original width / original height is greater
// than new width / new height
if ($orig_w/$orig_h > $width/$height) {
// then resize to the new height...
$commands .= ' -resize "x'.$height.'"';
// ... and get the middle part of the new image
// what is the resized width?
$resized_w = ($height/$orig_h) * $orig_w;
// crop
$commands .= ' -crop "'.$width.'x'.$height.
'+'.round(($resized_w - $width)/2).'+0"';
} else {
// or else resize to the new width
$commands .= ' -resize "'.$width.'"';
// ... and get the middle part of the new image
// what is the resized height?
$resized_h = ($width/$orig_w) * $orig_h;
// crop
$commands .= ' -crop "'.$width.'x'.$height.
'+0+'.round(($resized_h - $height)/2).'"';
}
break;
case 'type':
// convert the image to this file type
if (!preg_match('/^[a-z]+$/',$match[4])) {
die('ERROR: Invalid parameter.');
}
$new_type = $match[4];
break;
default:
// nothing special, just add the command
if ($match[4]=='') {
// no parameter given, eg: flip
$commands .= ' -'.$match[2].'';
} else {
$commands .= ' -'.$match[2].' "'.$match[4].'"';
}
}
}
// create the convert-command
$convert = $convert_path.' '.$commands.' "'.$image.'" ';
if (isset($new_type)) {
// send file type-command to imagemagick
$convert .= $new_type.':';
}
$convert .= '"'.$cache.'"';
// execute imagemagick's convert, save output as $cache
exec($convert);
}
// === OUTPUT ============================================================
// there should be a file named $cache now
if (!file_exists($cache)) {
die('ERROR: Image conversion failed.');
}
// get image data for use in http-headers
$imginfo = getimagesize($cache);
$content_length = filesize($cache);
$last_modified = gmdate('D, d M Y H:i:s',filemtime($cache)).' GMT';
// array of getimagesize() mime types
$getimagesize_mime = array(1=>'image/gif',2=>'image/jpeg',3=>'image/png',
4=>'application/x-shockwave-flash',5=>'image/psd',
6=>'image/bmp',7=>'image/tiff',8=>'image/tiff',
9=>'image/jpeg',
13=>'application/x-shockwave-flash',
14=>'image/iff');
// did the browser send an if-modified-since request?
if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE'])) {
// parse header
$if_modified_since = preg_replace('/;.*$/', '', $_SERVER['HTTP_IF_MODIFIED_SINCE']);
if ($if_modified_since == $last_modified) {
// the browser's cache is still up to date
header("HTTP/1.0 304 Not Modified");
header("Cache-Control: max-age=86400, must-revalidate");
exit;
}
}
// send other headers
header('Cache-Control: max-age=86400, must-revalidate');
header('Content-Length: '.$content_length);
header('Last-Modified: '.$last_modified);
if (isset($getimagesize_mime[$imginfo[2]])) {
header('Content-Type: '.$getimagesize_mime[$imginfo[2]]);
} else {
// send generic header
header('Content-Type: application/octet-stream');
}
// and finally, send the image
readfile($cache);
?>
If anyone could help id really appreciate it
