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image_resized.php
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<?php
/**
* phpwcms content management system
*
* @author Oliver Georgi <[email protected]>
* @copyright Copyright (c) 2002-2016, Oliver Georgi
* @license http://opensource.org/licenses/GPL-2.0 GNU GPL-2
* @link http://www.phpwcms.org
*
**/
// <img src="image_resized.php?format=jpg&w=100&h=200&q=85&imgfile=test.jpg" alt="" border="0">
$img_target = (isset($_GET['format'])) ? strtolower(trim($_GET['format'])) : 'jpg';
$img_file = (isset($_GET['imgfile'])) ? trim($_GET['imgfile']) : 'img/leer.gif';
$img_width = (isset($_GET['w'])) ? intval($_GET['w']) : 0;
$img_height = (isset($_GET['h'])) ? intval($_GET['h']) : 0;
$img_quality= (isset($_GET['q']) && intval($_GET['q']) <= 100 && intval($_GET['q'])) ? intval($_GET['q']) : 75;
$img_file = str_replace(array('http://', 'https://'), '', $img_file);
switch($img_target) {
case 'png': $img_mimetype = 'image/png';
$img_target = 'jpg';
break;
case 'gif': if(function_exists('imagegif')) {
$img_mimetype = 'image/gif';
$img_target = 'gif';
} else {
$img_target = 'png';
$img_mimetype = 'image/png';
}
break;
case 'jpeg':
case 'jpg':
default: $img_mimetype = 'image/jpeg';
$img_target = 'jpg';
}
if(is_file($img_file) && $img_info = getimagesize($img_file)) {
if(!$img_width || $img_width >= $img_info[0]) {
$percent_width = 1;
} else {
$percent_width = $img_width / $img_info[0];
}
if(!$img_height || $img_height >= $img_info[1]) {
$percent_height = 1;
} else {
$percent_height = $img_height / $img_info[1];
}
if($percent_height < $percent_width) {
$percent = $percent_height;
} elseif($percent_height > $percent_width) {
$percent = $percent_width;
} else {
$percent = $percent_width;
}
$img_width = ($img_info[0] * $percent);
$img_height = ($img_info[1] * $percent);
switch($img_target) {
case 'jpg': $new_img = imagecreatetruecolor($img_width, $img_height);
break;
case 'png': $new_img = imagecreatetruecolor($img_width, $img_height);
break;
case 'gif': $new_img = imagecreate($img_width, $img_height);
break;
}
switch($img_info[2]) {
case 1: // GIF
$img_source = imagecreatefromgif($img_file);
break;
case 2: // JPG
$img_source = imagecreatefromjpeg($img_file);
break;
case 3: // PNG
$img_source = imagecreatefrompng($img_file);
break;
}
imagecopyresized($new_img, $img_source, 0, 0, 0, 0, $img_width, $img_height, $img_info[0], $img_info[1]);
header('Content-type: '.$img_mimetype);
switch($img_target) {
case 'jpg': imagejpeg($new_img, NULL, $img_quality);
break;
case 'png': imagepng($new_img, NULL, 9);
break;
case 'gif': imagegif($new_img);
break;
}
imagedestroy($new_img);
imagedestroy($img_source);
} else {
// error / no image
header ('Content-type: image/png');
$new_img = imagecreatetruecolor(75, 20);
$text_color = imagecolorallocate($new_img, 255, 255, 255);
imagestring($new_img, 1, 5, 5, "Image Error", $text_color);
imagepng($new_img, NULL, 9);
imagedestroy($new_img);
}