PHp-调整PNG图像大小时出现内存错误 [英] PHp - memory error when resizing a PNG image

问题描述

我有一个脚本，可以从上传的图像中创建缩略图.可以与jpgs配合使用，但会给我一个错误

I have a script that creates a thumbnail out of an uploaded image. it works fine with jpgs, but gives me an error

致命错误:允许的内存大小已用完67108864字节(尝试分配26250000字节)

Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 26250000 bytes)

当我上传png图片时.

when I upload a png image.

脚本为:

//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;
}

正如我所说的，它与JPG以及GIF都可以完美配合. 该内存错误仅在PNG中出现，而我只使用了1.2Mb的图像.

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.

我该如何解决? 谢谢 帕特里克

How can i solve this? thanks Patrick

推荐答案

在脚本前使用ini_set('memory_limit', '256M');.

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