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Get Width and Height From a Filename

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I use this little guy to get the width and height from a filename. Often when I need to show a flash swf file I don't have an easy way to tell the width and the height of the file for display. However is the file name is "some_flash_file 300x250.swf" then this litte guy will help a lot.

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  1. /**
  2. *
  3. *  Function: getWH
  4. *  Description: Return the width and height from a given string
  5. *
  6. *  Param:  $f a string that hopefully has ###x### some where in it
  7. *
  8. *  Caveat: This will not work on every single file name ever conceived by man.
  9. *          ex, something45x77x88x90x13.jpg not only is a stupid name for a file
  10. *              but will foobar this function.
  11. *
  12. **/
  13. function getWH( $f )
  14. {
  15.         // First we get the height by stripping off the numbers that follow an 'x'
  16. 	preg_match( "/^.*x([0-9]+).*$/" , strtolower( $f ) , $matches );
  17. 	$height = $matches[1];
  18.  
  19.         // Next we reverse the string and do the same thing for the width	
  20. 	$f = strrev( $f );
  21. 	preg_match( "/^.*x([0-9]+).*$/" , strtolower( $f ) , $matches );
  22. 	$width = strrev( $matches[1] ); // re-reverse
  23.  
  24.         // Probably there exists a better regular expression to do it in one step.
  25.         // Then again there is probably a regular expression that can cure world hunger
  26.         // Maybe someday I will figure out both!
  27.  
  28. 	$dims[0] = $width;
  29. 	$dims[1] = $height;
  30.  
  31. 	return $dims; // return a simple array
  32. }

URL: http://www.itsgotto.be/cv.php

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