PHP中使用imagick实现把PDF转成图片,
PHP中使用imagick实现把PDF转成图片,
PHP Manual里,对imagick的描述,真的是简洁,每个成员函数,点击打开就看到如下文本:
复制代码 代码如下:
Warning
This function is currently not documented; only its argument list is available.
刚才解决了PHP加载问题后,对图片的处理相当方便,网上随便找了一段:
复制代码 代码如下:
Header("Content-type: image/jpeg");
/**
* 缩小图片尺寸.
*
* @param $image 待处理的二进制图片
* @param $width 处理后图片尺寸的宽度(px)
* @param $height 处理后图片尺寸的高度(px)
* @param $crop 是否裁剪图片
*
* @return 处理好的二进制图片
*/
function resize($image, $width, $height, $crop)
{
$imagick = new Imagick($image);
$w = $imagick->getImageWidth();
$h = $imagick->getImageHeight();
if ($w > $width || $h > $height)
{
if ($crop)
{
$imagick->cropThumbnailImage($width, $height);
}
else
{
$imagick->resizeImage($width, $height, Imagick::FILTER_LANCZOS, 1, true);
}
}
$processed_image = $imagick->getImageBlob();
return $processed_image;
}
$s=resize("123.jpg", 60, 40, 1);
echo $s;
?>
但我要用这个扩展做的,是将PDF转成PNG。PDF哦!
复制代码 代码如下:
/**
* PDF2PNG
* @param $pdf 待处理的PDF文件
* @param $path 待保存的图片路径
* @param $page 待导出的页面 -1为全部 0为第一页 1为第二页
* @return 保存好的图片路径和文件名
*/
function pdf2png($pdf,$path,$page=-1)
{
if(!extension_loaded('imagick'))
{
return false;
}
if(!file_exists($pdf))
{
return false;
}
$im = new Imagick();
$im->setResolution(120,120);
$im->setCompressionQuality(100);
if($page==-1)
$im->readImage($pdf);
else
$im->readImage($pdf."[".$page."]");
foreach ($im as $Key => $Var)
{
$Var->setImageFormat('png');
$filename = $path."/". md5($Key.time()).'.png';
if($Var->writeImage($filename) == true)
{
$Return[] = $filename;
}
}
return $Return;
}
$path="images";//请确保当前目录下有这个文件夹,由于一直要用,所以就不加检测了
$s=pdf2png("test.pdf",$path);
$scount=count($s);
for($i=0;$i
{
echo "
";
}
?>
跟上面的差不多吧?可是总是不成功,readImage那边异常了,查看错误输出:
复制代码 代码如下:
PHP Fatal error: Uncaught exception 'ImagickException' with message 'PostscriptDelegateFailed `test.pdf': No such file or directory'
百度谷歌了好久,最后灵机一动,不是说Postscript么?我找,我装。
这个Postscript,其实是GhostScript。
装好后,一跑,OK啦!

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