Experience on Lossless Compression of Images (2)_PHP Tutorial-PHP Tutorial-php.cn

Experience on Lossless Compression of Images (2)_PHP Tutorial

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Release： 2016-07-20 11:15:27

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None of the image upload activities that the user participated in before on Fever.com have been processed by lossless compression. I want to use a script to process the images uploaded within one month, but the Amazon_S3 service cluster can only use some simple ones they provide. API. So we can only download it first, compress it, and then upload it to overwrite the original image.

After many debuggings, I finally wrote a php script to process it: see here for details.

The code is as follows:

<span class="lnum">   1:  </span><?php

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<span class="lnum">   2:  </span><span class="kwrd">function</span> compress_img ($source) {

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<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>);

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<span class="lnum">   4:  </span>    $start_time = strtotime(<span class="str">"-30 day"</span>);

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<span class="lnum">   5:  </span>    exec(<span class="str">"s3cmd ls s3://fever38-us-static/hotdeals/{$source}/ > ./tmp.txt"</span>);

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<span class="lnum">   6:  </span>    $rs = file(<span class="str">'./tmp.txt'</span>);

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<span class="lnum">   7:  </span>&#160;

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<span class="lnum">   8:  </span>    <span class="kwrd">foreach</span>($rs <span class="kwrd">as</span> $line) {

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<span class="lnum">   9:  </span>        $r =  array_filter(explode(<span class="str">' '</span>, $line));

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<span class="lnum">  10:  </span>        <span class="kwrd">if</span>(!empty($r[0])){

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<span class="lnum">  11:  </span>            $r[0] = trim($r[0]);

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<span class="lnum">  12:  </span>            $time = strtotime($r[0]);

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<span class="lnum">  13:  </span>        }

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<span class="lnum">  14:  </span>        <span class="kwrd">if</span>(!empty($time) && $time >= $start_time){

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<span class="lnum">  15:  </span>            <span class="kwrd">if</span>(!empty($r[10])){

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<span class="lnum">  16:  </span>                $img = trim($r[10]);

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<span class="lnum">  17:  </span>                $path_info = pathinfo($r[10]);

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<span class="lnum">  18:  </span>                $ext = trim($path_info[<span class="str">"extension"</span>]);

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<span class="lnum">  19:  </span>                $file_name = strtolower(trim($path_info[<span class="str">"basename"</span>]));

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<span class="lnum">  20:  </span>&#160;

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<span class="lnum">  21:  </span>                exec(<span class="str">"s3cmd get "</span>.$img);

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<span class="lnum">  22:  </span>                exec(<span class="str">"cp {$file_name} /mnt/heisoo/s3/{$source}/"</span>);

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<span class="lnum">  23:  </span>&#160;

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<span class="lnum">  24:  </span>                <span class="kwrd">if</span> (in_array($ext,$exts)) {

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<span class="lnum">  25:  </span>                    system(<span class="str">"/usr/bin/optipng -o5 "</span>.$file_name);

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<span class="lnum">  26:  </span>                }

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<span class="lnum">  27:  </span>                <span class="kwrd">if</span> ($ext == <span class="str">"jpg"</span> || $ext == <span class="str">"jpeg"</span>) {

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<span class="lnum">  28:  </span>                    system(<span class="str">"/usr/bin/jpegoptim -o --strip-all "</span>.$file_name);

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<span class="lnum">  29:  </span>                }

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<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>);

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<span class="lnum">  31:  </span>                unlink($file_name);

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<span class="lnum">  32:  </span>            }

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<span class="lnum">  33:  </span>        }

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<span class="lnum">  34:  </span>    }

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<span class="lnum">  35:  </span>&#160;

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<span class="lnum">  36:  </span>    unlink(<span class="str">'./tmp.txt'</span>);

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<span class="lnum">  37:  </span>}

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<span class="lnum">  38:  </span>&#160;

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<span class="lnum">  39:  </span>compress_img(<span class="str">"promotion_main_pic"</span>);

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<span class="lnum">  40:  </span>compress_img(<span class="str">"src_thumb"</span>);

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<span class="lnum">  41:  </span>compress_img(<span class="str">"uploadImage"</span>);

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<span class="lnum">  42:  </span>compress_img(<span class="str">"dialog_image"</span>);

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<span class="lnum">  43:  </span>compress_img(<span class="str">"joinPicture"</span>);

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<span class="lnum">  44:  </span>?>

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