为什么 PHP exec('convert input.pdf output.jpg') 不起作用？

【问题标题】：Why does PHP exec('convert input.pdf output.jpg') not work?为什么 PHP exec('convert input.pdf output.jpg') 不起作用？
【发布时间】：2016-11-05 12:57:26
【问题描述】：

环境：在带有 Mamp 的 Mac 上使用 brew 安装 ghostscript 和 brew 安装 imagemagick。 不要问为什么......或建议其他执行方式

问题：通过 mamp php 页面运行 php exec 并在 pdf 文件上使用 imagemagick 的转换来输出图像没有任何作用。没有返回错误。在控制台中运行相同的命令时，它可以工作。当使用 php exec 运行 gs 时，它可以在 pdf 文件上提取单个页面。当使用 php exec 运行转换以将图像转换为另一个图像时，它可以工作。即使在命令行中使用 php -r 运行将 pdf 转换为图像也可以。

不起作用：

PHP Exec 转换 pdf：（不起作用）:(

$pdf_command = "convert input.pdf[0] output.jpg --debug all  2>&1";
exec($pdf_command, $output);
print_r($output);  

[0] => 2016-11-05T09:24:54-04:00 0:00.000 0.000u 6.9.3 Configure convert[95804]: utility.c/ExpandFilenames/940/Configure
    [1] =>   Command line: convert {test_pdf.pdf[0]} {outimage.jpg} {-debug} {all}
    [2] => 2016-11-05T09:24:54-04:00 0:00.000 0.000u 6.9.3 Configure convert[95804]: configure.c/GetConfigureOptions/679/Configure
    [3] =>   Searching for configure file: "/usr/local/Cellar/imagemagick/6.9.3-7/share/ImageMagick-6/coder.xml"
    [4] => 2016-11-05T09:24:54-04:00 0:00.000 0.000u 6.9.3 Configure convert[95804]: configure.c/GetConfigureOptions/679/Configure
    [5] =>   Searching for configure file: "/usr/local/Cellar/imagemagick/6.9.3-7/lib/ImageMagick//config-Q16/coder.xml"
    [6] => 2016-11-05T09:24:54-04:00 0:00.000 0.000u 6.9.3 Configure convert[95804]: configure.c/GetConfigureOptions/679/Configure
    [7] =>   Searching for configure file: "/usr/local/Cellar/imagemagick/6.9.3-7/etc/ImageMagick-6/coder.xml"
    [8] => 2016-11-05T09:24:54-04:00 0:00.000 0.000u 6.9.3 Configure convert[95804]: configure.c/GetConfigureOptions/679/Configure
    [9] =>   Searching for configure file: "/usr/local/Cellar/imagemagick/6.9.3-7/share/doc/ImageMagick-6/coder.xml"
    [10] => 2016-11-05T09:24:54-04:00 0:00.000 0.000u 6.9.3 Configure convert[95804]: coder.c/LoadCoderCache/823/Configure
    [11] =>   Loading coder configuration file "/usr/local/Cellar/imagemagick/6.9.3-7/etc/ImageMagick-6/coder.xml" ...
    [12] => 2016-11-05T09:24:54-04:00 0:00.000 0.000u 6.9.3 Module convert[95804]: module.c/OpenModule/1286/Module
    [13] =>   Searching for module "PDF" using filename "pdf.la"
    [14] => 2016-11-05T09:24:54-04:00 0:00.000 0.000u 6.9.3 Module convert[95804]: module.c/GetMagickModulePath/556/Module
    [15] =>   Searching for coder module file "pdf.la" ...
    [16] => 2016-11-05T09:24:54-04:00 0:00.000 0.000u 6.9.3 Module convert[95804]: module.c/OpenModule/1295/Module
    [17] =>   Opening module at path "/usr/local/Cellar/imagemagick/6.9.3-7/lib/ImageMagick//modules-Q16/coders/pdf.la"
    [18] => 2016-11-05T09:24:54-04:00 0:00.000 0.000u 6.9.3 Module convert[95804]: module.c/OpenModule/1322/Module
    [19] =>   Method "RegisterPDFImage" in module "PDF" at address 0x10afcb268
    [20] => 2016-11-05T09:24:54-04:00 0:00.000 0.000u 6.9.3 Module convert[95804]: module.c/OpenModule/1336/Module
    [21] =>   Method "UnregisterPDFImage" in module "PDF" at address 0x10afd144b
    [22] => 2016-11-05T09:24:54-04:00 0:00.000 0.000u 6.9.3 Policy convert[95804]: policy.c/IsRightsAuthorized/574/Policy
    [23] =>   Domain: Path; rights=Read; pattern="test_pdf.pdf" ...
    [24] => 2016-11-05T09:24:54-04:00 0:00.000 0.000u 6.9.3 Blob convert[95804]: blob.c/OpenBlob/2594/Blob
    [25] =>     read 3 magic header bytes
    [26] => 2016-11-05T09:24:54-04:00 0:00.000 0.000u 6.9.3 Cache convert[95804]: cache.c/DestroyPixelCache/999/Cache
    [27] =>   destroy
    [28] => 2016-11-05T09:24:54-04:00 0:00.000 0.000u 6.9.3 Configure convert[95804]: configure.c/GetConfigureOptions/679/Configure
    [29] =>   Searching for configure file: "/usr/local/Cellar/imagemagick/6.9.3-7/share/ImageMagick-6/magic.xml"
    [30] => 2016-11-05T09:24:54-04:00 0:00.000 0.000u 6.9.3 Configure convert[95804]: configure.c/GetConfigureOptions/679/Configure
    [31] =>   Searching for configure file: "/usr/local/Cellar/imagemagick/6.9.3-7/lib/ImageMagick//config-Q16/magic.xml"
    [32] => 2016-11-05T09:24:54-04:00 0:00.000 0.000u 6.9.3 Configure convert[95804]: configure.c/GetConfigureOptions/679/Configure
    [33] =>   Searching for configure file: "/usr/local/Cellar/imagemagick/6.9.3-7/etc/ImageMagick-6/magic.xml"
    [34] => 2016-11-05T09:24:54-04:00 0:00.000 0.000u 6.9.3 Configure convert[95804]: configure.c/GetConfigureOptions/679/Configure
    [35] =>   Searching for configure file: "/usr/local/Cellar/imagemagick/6.9.3-7/share/doc/ImageMagick-6/magic.xml"
    [36] => 2016-11-05T09:24:54-04:00 0:00.000 0.000u 6.9.3 Configure convert[95804]: magic.c/LoadMagicCache/789/Configure
    [37] =>   Loading magic configure file "/usr/local/Cellar/imagemagick/6.9.3-7/etc/ImageMagick-6/magic.xml" ...
    [38] => 2016-11-05T09:24:54-04:00 0:00.000 0.000u 6.9.3 Policy convert[95804]: policy.c/IsRightsAuthorized/574/Policy
    [39] =>   Domain: Coder; rights=Read; pattern="PDF" ...
    [40] => 2016-11-05T09:24:54-04:00 0:00.000 0.000u 6.9.3 Policy convert[95804]: policy.c/IsRightsAuthorized/574/Policy
    [41] =>   Domain: Path; rights=Read; pattern="test_pdf.pdf" ...
    [42] => 2016-11-05T09:24:54-04:00 0:00.000 0.000u 6.9.3 Blob convert[95804]: blob.c/OpenBlob/2594/Blob
    [43] =>     read 3 magic header bytes
    [44] => 2016-11-05T09:24:54-04:00 0:00.000 0.000u 6.9.3 Cache convert[95804]: cache.c/DestroyPixelCache/999/Cache
    [45] =>   destroy
    [46] => 2016-11-05T09:24:54-04:00 0:00.000 0.000u 6.9.3 Policy convert[95804]: policy.c/IsRightsAuthorized/574/Policy
    [47] =>   Domain: Path; rights=Read; pattern="test_pdf.pdf" ...
    [48] => 2016-11-05T09:24:54-04:00 0:00.000 0.000u 6.9.3 Blob convert[95804]: blob.c/OpenBlob/2594/Blob
    [49] =>     read 3 magic header bytes
    [50] => 2016-11-05T09:24:54-04:00 0:00.000 0.000u 6.9.3 Resource convert[95804]: resource.c/AcquireUniqueFileResource/502/Resource
    [51] =>   ...
    [52] => 2016-11-05T09:24:54-04:00 0:00.000 0.000u 6.9.3 Resource convert[95804]: resource.c/AcquireUniqueFileResource/553/Resource
    [53] =>   Acquire /var/tmp/magick-95804YtWGdJXpcmM8
    [54] => 2016-11-05T09:24:54-04:00 0:00.000 0.000u 6.9.3 Resource convert[95804]: resource.c/RelinquishUniqueFileResource/1042/Resource
    [55] =>   Relinquish /var/tmp/magick-95804YtWGdJXpcmM8
    [56] => 2016-11-05T09:24:54-04:00 0:00.000 0.000u 6.9.3 Exception convert[95804]: utility.c/ShredFile/1822/Exception
    [57] =>   Failed to remove: /var/tmp/magick-95804YtWGdJXpcmM8.cache
    [58] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Resource convert[95804]: resource.c/AcquireUniqueFileResource/502/Resource
    [59] =>   ...
    [60] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Resource convert[95804]: resource.c/AcquireUniqueFileResource/553/Resource
    [61] =>   Acquire /var/tmp/magick-95804xlBtBwymf2E7
    [62] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Configure convert[95804]: configure.c/GetConfigureOptions/679/Configure
    [63] =>   Searching for configure file: "/usr/local/Cellar/imagemagick/6.9.3-7/share/ImageMagick-6/delegates.xml"
    [64] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Configure convert[95804]: configure.c/GetConfigureOptions/679/Configure
    [65] =>   Searching for configure file: "/usr/local/Cellar/imagemagick/6.9.3-7/lib/ImageMagick//config-Q16/delegates.xml"
    [66] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Configure convert[95804]: configure.c/GetConfigureOptions/679/Configure
    [67] =>   Searching for configure file: "/usr/local/Cellar/imagemagick/6.9.3-7/etc/ImageMagick-6/delegates.xml"
    [68] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Configure convert[95804]: configure.c/GetConfigureOptions/679/Configure
    [69] =>   Searching for configure file: "/usr/local/Cellar/imagemagick/6.9.3-7/share/doc/ImageMagick-6/delegates.xml"
    [70] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Configure convert[95804]: delegate.c/LoadDelegateCache/1498/Configure
    [71] =>   Loading delegate configuration file "/usr/local/Cellar/imagemagick/6.9.3-7/etc/ImageMagick-6/delegates.xml" ...
    [72] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Resource convert[95804]: resource.c/AcquireUniqueFileResource/502/Resource
    [73] =>   ...
    [74] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Resource convert[95804]: resource.c/AcquireUniqueFileResource/553/Resource
    [75] =>   Acquire /var/tmp/magick-95804sJWpHcGjyE2T
    [76] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Resource convert[95804]: resource.c/RelinquishUniqueFileResource/1042/Resource
    [77] =>   Relinquish /var/tmp/magick-95804sJWpHcGjyE2T
    [78] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Exception convert[95804]: utility.c/ShredFile/1822/Exception
    [79] =>   Failed to remove: /var/tmp/magick-95804sJWpHcGjyE2T.cache
    [80] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Policy convert[95804]: policy.c/IsRightsAuthorized/574/Policy
    [81] =>   Domain: Delegate; rights=Execute; pattern="gs" ...
    [82] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Resource convert[95804]: resource.c/RelinquishUniqueFileResource/1042/Resource
    [83] =>   Relinquish /var/tmp/magick-95804xlBtBwymf2E7
    [84] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Exception convert[95804]: utility.c/ShredFile/1822/Exception
    [85] =>   Failed to remove: /var/tmp/magick-95804xlBtBwymf2E7.cache
    [86] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Resource convert[95804]: resource.c/RelinquishUniqueFileResource/1042/Resource
    [87] =>   Relinquish /var/tmp/magick-95804YtWGdJXpcmM8
    [88] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Exception convert[95804]: utility.c/ShredFile/1822/Exception
    [89] =>   Failed to remove: /var/tmp/magick-95804YtWGdJXpcmM8.cache
    [90] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Cache convert[95804]: cache.c/DestroyPixelCache/999/Cache
    [91] =>   destroy
    [92] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Module convert[95804]: module.c/OpenModule/1286/Module
    [93] =>   Searching for module "JPEG" using filename "jpeg.la"
    [94] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Module convert[95804]: module.c/GetMagickModulePath/556/Module
    [95] =>   Searching for coder module file "jpeg.la" ...
    [96] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Module convert[95804]: module.c/OpenModule/1295/Module
    [97] =>   Opening module at path "/usr/local/Cellar/imagemagick/6.9.3-7/lib/ImageMagick//modules-Q16/coders/jpeg.la"
    [98] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Module convert[95804]: module.c/OpenModule/1322/Module
    [99] =>   Method "RegisterJPEGImage" in module "JPEG" at address 0x10b00ce20
    [100] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Module convert[95804]: module.c/OpenModule/1336/Module
    [101] =>   Method "UnregisterJPEGImage" in module "JPEG" at address 0x10b0107f7
    [102] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Policy convert[95804]: policy.c/IsRightsAuthorized/574/Policy
    [103] =>   Domain: Path; rights=Read; pattern="outimage.jpg" ...
    [104] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Locale convert[95804]: locale.c/GetLocaleOptions/825/Locale
    [105] =>   Searching for locale file: "/usr/local/Cellar/imagemagick/6.9.3-7/share/ImageMagick-6/locale.xml"
    [106] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Locale convert[95804]: locale.c/GetLocaleOptions/825/Locale
    [107] =>   Searching for locale file: "/usr/local/Cellar/imagemagick/6.9.3-7/lib/ImageMagick//config-Q16/locale.xml"
    [108] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Locale convert[95804]: locale.c/GetLocaleOptions/825/Locale
    [109] =>   Searching for locale file: "/usr/local/Cellar/imagemagick/6.9.3-7/etc/ImageMagick-6/locale.xml"
    [110] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Locale convert[95804]: locale.c/GetLocaleOptions/825/Locale
    [111] =>   Searching for locale file: "/usr/local/Cellar/imagemagick/6.9.3-7/share/doc/ImageMagick-6/locale.xml"
    [112] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Configure convert[95804]: locale.c/LoadLocaleCache/1176/Configure
    [113] =>   Loading locale configure file "/usr/local/Cellar/imagemagick/6.9.3-7/share/ImageMagick-6/locale.xml" ...
    [114] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Locale convert[95804]: locale.c/GetLocaleOptions/825/Locale
    [115] =>   Searching for locale file: "/usr/local/Cellar/imagemagick/6.9.3-7/share/ImageMagick-6/english.xml"
    [116] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Locale convert[95804]: locale.c/GetLocaleOptions/825/Locale
    [117] =>   Searching for locale file: "/usr/local/Cellar/imagemagick/6.9.3-7/lib/ImageMagick//config-Q16/english.xml"
    [118] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Locale convert[95804]: locale.c/GetLocaleOptions/825/Locale
    [119] =>   Searching for locale file: "/usr/local/Cellar/imagemagick/6.9.3-7/etc/ImageMagick-6/english.xml"
    [120] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Locale convert[95804]: locale.c/GetLocaleOptions/825/Locale
    [121] =>   Searching for locale file: "/usr/local/Cellar/imagemagick/6.9.3-7/share/doc/ImageMagick-6/english.xml"
    [122] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Configure convert[95804]: locale.c/LoadLocaleCache/1176/Configure
    [123] =>   Loading locale configure file "/usr/local/Cellar/imagemagick/6.9.3-7/share/ImageMagick-6/english.xml" ...
    [124] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Exception convert[95804]: blob.c/OpenBlob/2702/Exception
    [125] =>   unable to open image `outimage.jpg': No such file or directory
    [126] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Cache convert[95804]: cache.c/DestroyPixelCache/999/Cache
    [127] =>   destroy
    [128] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Policy convert[95804]: policy.c/IsRightsAuthorized/574/Policy
    [129] =>   Domain: Coder; rights=Read; pattern="JPG" ...
    [130] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Policy convert[95804]: policy.c/IsRightsAuthorized/574/Policy
    [131] =>   Domain: Path; rights=Read; pattern="outimage.jpg" ...
    [132] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Exception convert[95804]: blob.c/OpenBlob/2702/Exception
    [133] =>   unable to open image `outimage.jpg': No such file or directory
    [134] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Cache convert[95804]: cache.c/DestroyPixelCache/999/Cache
    [135] =>   destroy
    [136] => 2016-11-05T09:24:54-04:00 0:00.120 0.110u 6.9.3 Exception convert[95804]: convert.c/ConvertImageCommand/3249/Exception
    [137] =>   missing an image filename `all'
    [138] => convert: unable to open image `outimage.jpg': No such file or directory @ error/blob.c/OpenBlob/2702.
    [139] => convert: missing an image filename `all' @ error/convert.c/ConvertImageCommand/3249.

以下所有作品：

命令行：（有效）

convert input.pdf[0] output.jpg

命令行：（有效）

php -r 'exec("convert input.pdf[0] output.jpg");'

PHP Exec gs：（有效）

$gs_command = "gs -sDEVICE=pdfwrite -dNOPAUSE -dBATCH -dSAFER ";
$gs_command .= "-dFirstPage=1 -dLastPage=1 ";
$gs_command .= "-sOutputFile=output.pdf input.pdf ";
exec($gs_command, $output);

PHP Exec 转换图片：（有效）

$im_command = "convert input.jpg output.jpg";
exec($im_command, $output);

【问题讨论】：

  • 您是否尝试为input.pdf 传递绝对路径？为什么你认为空的命令输出意味着错误？您应该检查退出状态（exec 的第三个参数）。
  • 顺便说一下，它是-debug 而不是--debug。
  • 尝试在调用 convert 之前设置 PATH 并包括 /usr/local/bin 其中 homebrew 放置其所有二进制文件。

标签： php macos pdf imagemagick ghostscript


【解决方案1】：

原来 Apache 没有到 'gs' 的路径。

两种解决方案：

  1. 确保 Apache 具有指向 gs 位置的 EnvironmentVariables 路径。示例：'/usr/local/bin'
  2. 更新委托以使用绝对路径调用 ghostscript。
    • 更新 {{imagemagick-install-dir}}/delegates.xml
    • command=""gs" 到 command=""/usr/local/bin/gs"

参考：http://www.imagemagick.org/discourse-server/viewtopic.php?t=29096#p129955

【讨论】：

    【解决方案2】：

    仅使用 image magick convert 命令，如果您尝试使用 pdf 文件创建图像，则必须删除所有参数，首先将其转换，在第二步中您可以进行任何类型的额外转换

    1. 转换 input.pdf[0] output.jpg

    2. 转换 output.jpg -resize 100x129 output_thumb.jpg

    【讨论】：

      猜你喜欢
      • 1970-01-01
      • 2011-08-02
      • 1970-01-01
      • 1970-01-01
      • 1970-01-01
      • 1970-01-01
      • 1970-01-01
      • 1970-01-01
      • 2015-10-20
      相关资源
      最近更新 更多
      热门标签
      Java Python linux javascript Mysql C# Docker 算法 前端 SpringBoot Redis Vue spring 设计模式 .net core .net kubernetes c++ 数据库 数据结构 大数据 js 机器学习 微服务 Android Go 程序员 面试 JVM ASP.net core 云原生 人工智能 后端 PHP git CSS golang k8s Nginx Django mybatis 深度学习 多线程 React 架构 devops 爬虫 云计算 Spring Boot LeetCode