itrebal

function compare_offset ( $a, $b ){  if ( $a ['offset'] > $b ['offset'] ) return 1;  else if ( $a ['offset'] < $b ['offset'] ) return -1;  else {    if ( $a ['index'] > $b ['index'] ) return 1;    if ( $a ['index'] < $b ['index'] ) return -1;  }}function apply_rule ( $rdata, $text ){  $rule = new CRule ( $rdata );  $matches = $rule->get_matches ( $text );  usort ( $matches, compare_offset );  $pos = 0;  $adjust = 0;  for ( $i = 0; $i < count ( $matches ); $i++ ) {    if ( $matches [$i]['offset'] >= $pos ) {      $pos = $matches [$i]['offset'];      $text = substr_replace ( $text, $matches [$i]['replace'], $pos+$adjust, $matches [$i]['strlen'] );      $pos += $matches [$i]['strlen'];      $adjust += strlen ( $matches [$i]['replace'] ) - $matches [$i]['strlen'] ;    }  }      return $text;}