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  1. embeddedString = embeddedString.replace(/(widths*=s*["'])[0-9]+(["'])/ig, $1 + yourWidth + $2);
  2. embeddedString = embeddedString.replace(/(heights*=s*["'])[0-9]+(["'])/ig, $1 + yourHeight + $2);
  3.    
  4. embeddedString = embeddedString.replace(/widths*=s*["']["']/ig, function($0, $1)
  5. {
  6.     return $1 * 2;
  7. });
  8.    
  9. var originalWidth;
  10. var originalHeight;
  11. embeddedString = embeddedString.replace(/(?:width|height)s*=s*["']([0-9]+)["']s*(?:width|height)s*=s*["']([0-9]+)["']/ig, function($0, $1, $2, $3, $4)
  12. {
  13.     // $0 = original string
  14.     // $1 = either 'width' or 'height'
  15.     // $2 = the value of width or height, depending on above
  16.     // $3 = either 'width' or 'height'
  17.     // $4 = the value of width or height, depending on above
  18.     // here you might want to set another value, eg:
  19.     originalWidth = $2;
  20.     return "";
  21. });
  22.    
  23. width="(.*?)" height="(.*?)"
  24.    
  25. $pattern = '/width="(.*?)" height="(.*?)"/';
  26.      $subject = 'width="500" height="300"';
  27.  
  28.      preg_match($pattern, $subject, $matches);
  29.  
  30.      print_r($matches);
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