PHP - 调整 PNG 图像大小时出现内存错误
我有一个脚本可以根据上传的图像创建缩略图。它适用于 jpg，但给我一个错误
致命错误：允许的内存大小 67108864 字节已耗尽（尝试分配 26250000 字节）
致命错误：当我上传 png 图像时，
。脚本是：
//create thumbnail; $modwidth and height are calculated in another part of the script
//$original is the path to the full sized image
$tn = imagecreatetruecolor($modwidth, $modheight);
switch (strrchr($new_image_name,'.')) {
case ".jpg":
$image = imagecreatefromjpeg($original);
break;
case ".jpeg":
$image = imagecreatefromjpeg($original);
break;
case ".png":
$image = imagecreatefrompng($original);
break;
case ".gif":
$image = imagecreatefromgif($original);
break;
}
imagecopyresampled($tn, $image, 0, 0, $x_pos, $y_pos, $modwidth, $modheight, $width, $height);
switch (strrchr($new_image_name,'.')) {
case ".jpg":
imagejpeg($tn, $target_path, 100);
break;
case ".jpeg":
imagejpeg($tn, $target_path, 100);
break;
case ".png":
imagepng($tn, $target_path, 0);
break;
case ".gif":
imagegif($tn, $target_path);
break;
}
正如我所说，它与 JPG 和 GIF 完美配合。 该内存错误仅出现在 PNG 中，而且我只使用了 1.2Mb 的图像。
我该如何解决这个问题？ 谢谢 帕特里克
I have a script that creates a thumbnail out of an uploaded image. it works fine with jpgs, but gives me an error
Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 26250000 bytes)
when I upload a png image.
The script is:
//create thumbnail; $modwidth and height are calculated in another part of the script
//$original is the path to the full sized image
$tn = imagecreatetruecolor($modwidth, $modheight);
switch (strrchr($new_image_name,'.')) {
case ".jpg":
$image = imagecreatefromjpeg($original);
break;
case ".jpeg":
$image = imagecreatefromjpeg($original);
break;
case ".png":
$image = imagecreatefrompng($original);
break;
case ".gif":
$image = imagecreatefromgif($original);
break;
}
imagecopyresampled($tn, $image, 0, 0, $x_pos, $y_pos, $modwidth, $modheight, $width, $height);
switch (strrchr($new_image_name,'.')) {
case ".jpg":
imagejpeg($tn, $target_path, 100);
break;
case ".jpeg":
imagejpeg($tn, $target_path, 100);
break;
case ".png":
imagepng($tn, $target_path, 0);
break;
case ".gif":
imagegif($tn, $target_path);
break;
}
As I said it works perfectly with JPGs and also with GIFs.
That memory error appears only with PNGs, and I have only used a 1.2Mb image.
How can i solve this?
thanks
Patrick
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在脚本之前使用
ini_set('memory_limit', '256M');。Use
ini_set('memory_limit', '256M');before script.您需要将 php.ini 中的 memory_limit 设置增加到类似这样的值
You need to increase memory_limit setting in php.ini to something like this