当前位置：Gxlcms > PHP教程 > 无损压缩图片心得(二)_PHP教程

无损压缩图片心得(二)_PHP教程

时间：2021-07-01 10:21:17 帮助过：17人阅读

用户之前在发烧网参加的上传图片活动都没有经过无损压缩处理.想用脚本对一月内传上去的图片进行处理,但Amazon_S3服务集群上只能使用他们提供的一些简单的API.所以只能先down 下来,压缩处理后,再传上去覆盖原来的图片.

经过多次调试,最终写了个php的脚本对之进行处理:详见这里.

代码如下:

  1. <span class="lnum">   1:  </span><!--?php</pre-->
  2.   <pre class="code layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">   2:  </span><span class="kwrd">function</span> compress_img ($source) {</li></ol></pre>
  3.   <pre class="alt layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">   3:  </span>    $exts = array(<span class="str">"png"</span>,<span class="str">"bmp"</span>,<span class="str">"gif"</span>,<span class="str">"pnm"</span>,<span class="str">"tiff"</span>);</li></ol></pre>
  4.   <pre class="code layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">   4:  </span>    $start_time = strtotime(<span class="str">"-30 day"</span>);</li></ol></pre>
  5.   <pre class="alt layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">   5:  </span>    exec(<span class="str">"s3cmd ls s3://fever38-us-static/hotdeals/{$source}/ > ./tmp.txt"</span>);</li></ol></pre>
  6.   <pre class="code layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">   6:  </span>    $rs = file(<span class="str">'./tmp.txt'</span>);</li></ol></pre>
  7.   <pre class="alt layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">   7:  </span> </li></ol></pre>
  8.   <pre class="code layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">   8:  </span>    <span class="kwrd">foreach</span>($rs <span class="kwrd">as</span> $line) {</li></ol></pre>
  9.   <pre class="alt layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">   9:  </span>        $r =  array_filter(explode(<span class="str">' '</span>, $line));</li></ol></pre>
  10.   <pre class="code layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">  10:  </span>        <span class="kwrd">if</span>(!empty($r[0])){</li></ol></pre>
  11.   <pre class="alt layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">  11:  </span>            $r[0] = trim($r[0]);</li></ol></pre>
  12.   <pre class="code layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">  12:  </span>            $time = strtotime($r[0]);</li></ol></pre>
  13.   <pre class="alt layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">  13:  </span>        }</li></ol></pre>
  14.   <pre class="code layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">  14:  </span>        <span class="kwrd">if</span>(!empty($time) && $time >= $start_time){</li></ol></pre>
  15.   <pre class="alt layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">  15:  </span>            <span class="kwrd">if</span>(!empty($r[10])){</li></ol></pre>
  16.   <pre class="code layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">  16:  </span>                $img = trim($r[10]);</li></ol></pre>
  17.   <pre class="alt layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">  17:  </span>                $path_info = pathinfo($r[10]);</li></ol></pre>
  18.   <pre class="code layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">  18:  </span>                $ext = trim($path_info[<span class="str">"extension"</span>]);</li></ol></pre>
  19.   <pre class="alt layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">  19:  </span>                $file_name = strtolower(trim($path_info[<span class="str">"basename"</span>]));</li></ol></pre>
  20.   <pre class="code layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">  20:  </span> </li></ol></pre>
  21.   <pre class="alt layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">  21:  </span>                exec(<span class="str">"s3cmd get "</span>.$img);</li></ol></pre>
  22.   <pre class="code layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">  22:  </span>                exec(<span class="str">"cp {$file_name} /mnt/heisoo/s3/{$source}/"</span>);</li></ol></pre>
  23.   <pre class="alt layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">  23:  </span> </li></ol></pre>
  24.   <pre class="code layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">  24:  </span>                <span class="kwrd">if</span> (in_array($ext,$exts)) {</li></ol></pre>
  25.   <pre class="alt layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">  25:  </span>                    system(<span class="str">"/usr/bin/optipng -o5 "</span>.$file_name);</li></ol></pre>
  26.   <pre class="code layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">  26:  </span>                }</li></ol></pre>
  27.   <pre class="alt layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">  27:  </span>                <span class="kwrd">if</span> ($ext == <span class="str">"jpg"</span> || $ext == <span class="str">"jpeg"</span>) {</li></ol></pre>
  28.   <pre class="code layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">  28:  </span>                    system(<span class="str">"/usr/bin/jpegoptim -o --strip-all "</span>.$file_name);</li></ol></pre>
  29.   <pre class="alt layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">  29:  </span>                }</li></ol></pre>
  30.   <pre class="code layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">  30:  </span>                system(<span class="str">"s3cmd put {$file_name} {$img} --guess-mime-type --add-header 'Cache-Control:max-age=31536000' --add-header 'Expires: Thu, 01 Dec 2014 16:00:00 GMT' --acl-public"</span>);</li></ol></pre>
  31.   <pre class="alt layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">  31:  </span>                unlink($file_name);</li></ol></pre>
  32.   <pre class="code layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">  32:  </span>            }</li></ol></pre>
  33.   <pre class="alt layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">  33:  </span>        }</li></ol></pre>
  34.   <pre class="code layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">  34:  </span>    }</li></ol></pre>
  35.   <pre class="alt layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">  35:  </span> </li></ol></pre>
  36.   <pre class="code layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">  36:  </span>    unlink(<span class="str">'./tmp.txt'</span>);</li></ol></pre>
  37.   <pre class="alt layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">  37:  </span>}</li></ol></pre>
  38.   <pre class="code layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">  38:  </span> </li></ol></pre>
  39.   <pre class="alt layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">  39:  </span>compress_img(<span class="str">"promotion_main_pic"</span>);</li></ol></pre>
  40.   <pre class="code layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">  40:  </span>compress_img(<span class="str">"src_thumb"</span>);</li></ol></pre>
  41.   <pre class="alt layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">  41:  </span>compress_img(<span class="str">"uploadImage"</span>);</li></ol></pre>
  42.   <pre class="code layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">  42:  </span>compress_img(<span class="str">"dialog_image"</span>);</li></ol></pre>
  43.   <pre class="alt layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">  43:  </span>compress_img(<span class="str">"joinPicture"</span>);</li></ol></pre>
  44.   <pre class="code layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li><span class="lnum">  44:  </span>?></li></ol></pre>
  45. <style type="text/css">
  46. .csharpcode, .csharpcode pre
  47. {
  48. font-size: small;
  49. color: black;
  50. font-family: consolas, "Courier New", courier, monospace;
  51. background-color: #ffffff;
  52. /*white-space: pre;*/
  53. }
  54. .csharpcode pre { margin: 0em; }
  55. .csharpcode .rem { color: #008000; }
  56. .csharpcode .kwrd { color: #0000ff; }
  57. .csharpcode .str { color: #006080; }
  58. .csharpcode .op { color: #0000c0; }
  59. .csharpcode .preproc { color: #cc6633; }
  60. .csharpcode .asp { background-color: #ffff00; }
  61. .csharpcode .html { color: #800000; }
  62. .csharpcode .attr { color: #ff0000; }
  63. .csharpcode .alt 
  64. {
  65. background-color: #f4f4f4;
  66. width: 100%;
  67. margin: 0em;
  68. }
  69. .csharpcode .lnum { color: #606060; }</style>
  70. <p></p>
  71. <p align="left"><span id="url" itemprop="url">http://www.bkjia.com/PHPjc/440176.html</span><span id="indexUrl" itemprop="indexUrl">www.bkjia.com</span><span id="isOriginal" itemprop="isOriginal">true</span><span id="isBasedOnUrl" itemprop="isBasedOnUrl">http://www.bkjia.com/PHPjc/440176.html</span><span id="genre" itemprop="genre">TechArticle</span><span id="description" itemprop="description">用户之前在发烧网参加的上传图片活动都没有经过无损压缩处理.想用脚本对一月内传上去的图片进行处理,但Amazon_S3服务集群上只能使用他...</span></p>
  72.

人气教程排行

本站所有资源全部来源于网络，若本站发布的内容侵害到您的隐私或者利益，请联系我们删除！