Lossless compression (II) _ PHP Tutorial

Lossless compression image experience (2 ). The image uploading activities that the user has previously participated in have not undergone lossless compression processing. I want to use a script to process images uploaded in January. However, on the Amazon_S3 service cluster, I can only use the images uploaded by my user on the fever network without lossless compression. I want to use scripts to process images uploaded in January, but the Amazon_S3 service cluster can only use some simple APIs they provide. so we can only go down first, compress the data, and then upload it to overwrite the original image.

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

The code is as follows:

1:
   
   2:  function compress_img ($source) {
  
   3:      $exts = array("png","bmp","gif","pnm","tiff");
  
   4:      $start_time = strtotime("-30 day");
  
   5:      exec("s3cmd ls s3://fever38-us-static/hotdeals/{$source}/ > ./tmp.txt");
  
   6:      $rs = file('./tmp.txt');
  
   7:   
  
   8:      foreach($rs as $line) {
  
   9:          $r =  array_filter(explode(' ', $line));
  
  10:          if(!empty($r[0])){
  
  11:              $r[0] = trim($r[0]);
  
  12:              $time = strtotime($r[0]);
  
  13:          }
  
  14:          if(!empty($time) && $time >= $start_time){
  
  15:              if(!empty($r[10])){
  
  16:                  $img = trim($r[10]);
  
  17:                  $path_info = pathinfo($r[10]);
  
  18:                  $ext = trim($path_info["extension"]);
  
  19:                  $file_name = strtolower(trim($path_info["basename"]));
  
  20:   
  
  21:                  exec("s3cmd get ".$img);
  
  22:                  exec("cp {$file_name} /mnt/heisoo/s3/{$source}/");
  
  23:   
  
  24:                  if (in_array($ext,$exts)) {
  
  25:                      system("/usr/bin/optipng -o5 ".$file_name);
  
  26:                  }
  
  27:                  if ($ext == "jpg" || $ext == "jpeg") {
  
  28:                      system("/usr/bin/jpegoptim -o --strip-all ".$file_name);
  
  29:                  }
  
  30:                  system("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");
  
  31:                  unlink($file_name);
  
  32:              }
  
  33:          }
  
  34:      }
  
  35:   
  
  36:      unlink('./tmp.txt');
  
  37:  }
  
  38:   
  
  39:  compress_img("promotion_main_pic");
  
  40:  compress_img("src_thumb");
  
  41:  compress_img("uploadImage");
  
  42:  compress_img("dialog_image");
  
  43:  compress_img("joinPicture");
  
  44:  ?>
Upload the uploaded image in March January. However, the amazon_s3service cluster can only use it...