Imagemagick无法读取文件（MAMP）

Question

我已经在我的MAMP开发环境中安装了Imagemagick扩展，并且PHP信息显示正确安装了imagemagick。但是，我收到以下例外：

PHP Fatal error:  Uncaught exception 'ImagickException' with message 
'Unable to read the file:
 /Applications/MAMP/htdocs/image/demo.pdf' 
in /Applications/MAMP/htdocs/image/index.php:8
Stack trace:
#0 /Applications/MAMP/htdocs/image/index.php(8): Imagick->__construct('/Applications/M...')
#1 {main}
  thrown in /Applications/MAMP/htdocs/image/index.php on line 8

源代码：

$pdf_file   = '/Applications/MAMP/htdocs/image/demo.pdf';

echo $pdf_file;

$save_to    = '/Applications/MAMP/htdocs/image/demo.jpg';

$img = new imagick($pdf_file);

//reduce the dimensions - scaling will lead to black color in transparent regions
$img->scaleImage(800,0);

//set new format
$img->setImageFormat('jpg');

//save image file
$img->writeImages($save_to, false);

修改1：

我正在使用brew来管理包。

我的MAMP配置：

Imagick扩展（php.ini）：

[imagick]
extension="/usr/local/Cellar/php55-imagick/3.1.0RC2/imagick.so"

envvars中：

路径：

/Applications/MAMP/Library/bin/envvars

内容：

#if test "x$DYLD_LIBRARY_PATH" != "x" ; then
# DYLD_LIBRARY_PATH="/Applications/MAMP/Library/lib:$DYLD_LIBRARY_PATH"
#else
  #DYLD_LIBRARY_PATH="/Applications/MAMP/Library/lib"
#fi
#export DYLD_LIBRARY_PATH


#DYLD_LIBRARY_PATH="/Applications/MAMP/bin/ImageMagick/ImageMagick-6.8.9/lib:/Applications/MAMP/Library/lib:$DYLD_LIBRARY_PATH"
#export DYLD_LIBRARY_PATH

Answer 1

首先检查你的pdf文件路径：

if (! is_readable('/Applications/MAMP/htdocs/image/demo.pdf')) {
    echo 'file not readable';
    exit();
}

如果文件可读，请查看：https://github.com/delphian/drupal-convert-file/wiki/Installing-ImageMagick-on-Mac-OSX-for-PHP-and-MAMP

Answer 2

来自http://www.php.net/manual/en/imagick.construct.php

当使用pdf文件时，我们可以指定使用哪个页面，这可能反过来帮助imageMagick在使用pdf文件时正确构建

$pdf_file   = '/Applications/MAMP/htdocs/image/demo.pdf';
$img = new Imagick($pdf_file.'[0]'); 
//[0] indicate the number of the wanted page