In PHP, how to find the second (or third, or fourth, or Nth) occurrence of a pat...

smallwei 5:07 am on October 26, 2009 | Answers: 1    
Tags: nth, occurrence (4), pattern, php (40), string (21), strpos

Rate Knowledge:

 Loading ...

• smallwei 5:09 am on October 26, 2009
  

  Use the following functions to get the position return.

  <?php
  
  /**
   *
   * @Find position of Nth occurance of search string
   * @param string $search The search string
   * @param string $string The string to search
   * @param int $offset The Nth occurance of string
   * @return int or false if not found
   *
   */
  function strposOffset($search, $string, $offset)
  {
      /*** explode the string ***/
      $arr = explode($search, $string);
      /*** check the search is not out of bounds ***/
      switch( $offset )
      {
          case $offset == 0:
          return false;
          break;
      
          case $offset > max(array_keys($arr)):
          return false;
          break;
  
          default:
          return strlen(implode($search, array_slice($arr, 0, $offset)));
      }
  }
  
  ?>

  source: PHPRO.ORG