PHP String Truncation

string-truncation.php

<?php

/**
* Truncates a string to be no more than $numwords. **Will work with html if $strip_html is true**
* @param  string  $input      The string to be truncated
* @param  int     $numwords   The number of words to be returned
* @param  string  $padding    Ellipsis...
* @param  boolean $strip_html Should be set to true if html is contained within $input
* @return string              The truncated string
*/
function truncate_string($input, $numwords, $padding="...", $strip_html=false) {
  
  $tmp = explode(' ', $input);
  $count_word = sizeof($tmp);

  if($strip_html == true){
    if($count_word > $numwords) {
      ob_start();
      echo $input;
      $old_input = ob_get_clean();
      $new_input = strip_tags($old_input);
      $output = strtok($new_input, " \n");
      while(--$numwords > 0) $output .= " " . strtok(" \n");
      if($output != $new_input) $output .= $padding;
      return $output;

    } else {
      ob_start();
      echo $input;
      $old_input = ob_get_clean();
      $new_input = strip_tags($old_input);
      $output = strtok($new_input, " \n");
      while(--$numwords > 0) $output .= " " . strtok(" \n");
      return $output;
    }
    
  } else {
    if($count_word > $numwords) {
      $output = strtok($input, " \n");
      while(--$numwords > 0) $output .= " " . strtok(" \n");
      if($output != $input) $output .= $padding;
      return $output; 
    } else {
      $output = strtok($input, " \n");
      while(--$numwords > 0) $output .= " " . strtok(" \n");
      return $output;
    }
  }
}

/**
* Truncates $input to a character $length
* @param  string $input   The string to be truncated
* @param  int    $length  The character length to be truncated to
* @param  string $elipsis ...
* @return string          The truncated $input
*/
function truncate_string_character($input, $length, $elipsis='...') {
  if(strlen($input) > $length):
    $output = substr($input, 0, $length);
    $output .= $elipsis;
    return $output;
  else:
    return $input;
  endif;
}