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Word Sensative substr function

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  1. <?php
  2. /**
  3. * word-sensitive substring function with html tags awareness
  4. * @param text The text to cut
  5. * @param len The maximum length of the cut string
  6. * @returns string
  7. **/
  8. function substrws( $text, $len=180 ) {
  9.  
  10.     if( (strlen($text) > $len) ) {
  11.  
  12.         $whitespaceposition = strpos($text," ",$len)-1;
  13.  
  14.         if( $whitespaceposition > 0 )
  15.             $text = substr($text, 0, ($whitespaceposition+1));
  16.  
  17.         // close unclosed html tags
  18.         if( preg_match_all("|<([a-zA-Z]+)>|",$text,$aBuffer) ) {
  19.  
  20.             if( !empty($aBuffer[1]) ) {
  21.  
  22.                 preg_match_all("|</([a-zA-Z]+)>|",$text,$aBuffer2);
  23.  
  24.                 if( count($aBuffer[1]) != count($aBuffer2[1]) ) {
  25.  
  26.                     foreach( $aBuffer[1] as $index => $tag ) {
  27.  
  28.                         if( empty($aBuffer2[1][$index]) || $aBuffer2[1][$index] != $tag)
  29.                             $text .= '</'.$tag.'>';
  30.                     }
  31.                 }
  32.             }
  33.         }
  34.     }
  35.  
  36.     return $text;
  37. }
  38. ?>

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