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   1  <?php
   2  /*
   3  * Smarty plugin
   4  * -------------------------------------------------------------
   5  * File: outputfilter.trimwhitespace.php
   6  * Type: outputfilter
   7  * Name: trimwhitespace
   8  * Version: 1.2
   9  * Date: April 30, 2002
  10  * Purpose: trim leading white space and blank lines from
  11  * template source after it gets interpreted, cleaning
  12  * up code and saving bandwidth. Does not affect
  13  * <PRE></PRE> and <SCRIPT></SCRIPT> blocks.
  14  * Install: Drop into the plugin directory, call
  15  * $smarty->load_filter('output','trimwhitespace');
  16  * from application.
  17  * Author: Monte Ohrt <monte@ispi.net>
  18  * -------------------------------------------------------------
  19  */
  20  function smarty_outputfilter_trimwhitespace($source, &$smarty)
  21  {
  22  // Pull out the script blocks
  23  preg_match_all("!<script[^>]+>.*?</script>!is", $source, $match);
  24  $_script_blocks = $match[0];
  25  $source = preg_replace("!<script[^>]+>.*?</script>!is",
  26  '@@@SMARTY:TRIM:SCRIPT@@@', $source);
  27   
  28  // Pull out the pre blocks
  29  preg_match_all("!<pre>.*?</pre>!is", $source, $match);
  30  $_pre_blocks = $match[0];
  31  $source = preg_replace("!<pre>.*?</pre>!is",
  32  '@@@SMARTY:TRIM:PRE@@@', $source);
  33   
  34  // Pull out the textarea blocks
  35  preg_match_all("!<textarea[^>]+>.*?</textarea>!is", $source, $match);
  36  $_textarea_blocks = $match[0];
  37  $source = preg_replace("!<textarea[^>]+>.*?</textarea>!is",
  38  '@@@SMARTY:TRIM:TEXTAREA@@@', $source);
  39   
  40  // remove all leading spaces, tabs and carriage returns NOT
  41  // preceeded by a php close tag.
  42  $source = preg_replace('/((?<!\?>)\n)[\s]+/m', '\1', $source);
  43   
  44  // replace script blocks
  45  foreach($_script_blocks as $curr_block) {
  46  $source = preg_replace("!@@@SMARTY:TRIM:SCRIPT@@@!",$curr_block,$source,1);
  47  }
  48  // replace pre blocks
  49  foreach($_pre_blocks as $curr_block) {
  50  $source = preg_replace("!@@@SMARTY:TRIM:PRE@@@!",$curr_block,$source,1);
  51  }
  52  // replace textarea blocks
  53  foreach($_textarea_blocks as $curr_block) {
  54  $source = preg_replace("!@@@SMARTY:TRIM:TEXTAREA@@@!",$curr_block,$source,1);
  55  }
  56   
  57  return $source;
  58  }
  59  ?>