我有一个图像目录,其中一些具有很大的分辨率,所以如果它们被热链接,我想提供一个分辨率低得多的版本,而且我还覆盖了一个重复的图像(如水印),通知查看者图像被盗并且在那里他们可以找到真正的原件。
我的重采样工作正常,但是当我为无热链接图像叠加添加功能时,它不起作用。问题是,我知道水印脚本也可以独立工作,因为我已经在网站的另一个文件中的其他地方使用过它。不幸的是,我不知道错误是什么,因为热链接测试站点不输出错误,它们只是显示一个空的图像占位符,而且我的主机的日志文件对我来说都像是希腊语。
这是我目前拥有的脚本:
<?php
ini_set('memory_limit','250M');
$path = $_SERVER['DOCUMENT_ROOT'].$_SERVER['REQUEST_URI'];
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=60, $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);
}
imagedestroy($image);
exit();
}
function getWidth() {
return imagesx($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;
}
function nothot() {
$hotlink = imagecreatefrompng('hotlink.png');
$hw = imagesx($hotlink);
$hh = imagesy($hotlink);
$img_paste_x = 0;
$img_paste_x = 0;
while($img_paste_x < $this->getWidth()){
$img_paste_y = 0;
while($img_paste_y < $this->getHeight()){
imagecopy($image, $hotlink, $img_paste_x, $img_paste_y, 0, 0, $hw, $hh);
$img_paste_y += $hh;
}
$img_paste_x += $hw;
}
imagedestroy($hotlink);
}
}
header('Content-Type: image/jpeg');
$image = new SimpleImage();
$image->load($path);
$image->resizeToWidth(600);
$image->nothot();
$image->output();
?>
谢谢你的帮助。