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   1  <?php
   2  /**
   3  * @version $Id: str_pad.php,v 1.1 2006/09/03 09:25:13 harryf Exp $
   4  * @package utf8
   5  * @subpackage strings
   6  */
   7  
   8  //---------------------------------------------------------------
   9  /**
  10  * Replacement for str_pad. $padStr may contain multi-byte characters.
  11  *
  12  * @author Oliver Saunders <oliver (a) osinternetservices.com>
  13  * @param string $input
  14  * @param int $length
  15  * @param string $padStr
  16  * @param int $type ( same constants as str_pad )
  17  * @return string
  18  * @see http://www.php.net/str_pad
  19  * @see utf8_substr
  20  * @package utf8
  21  * @subpackage strings
  22  */
  23  function utf8_str_pad($input, $length, $padStr = ' ', $type = STR_PAD_RIGHT) {
  24      
  25      $inputLen = utf8_strlen($input);
  26      if ($length <= $inputLen) {
  27          return $input;
  28      }
  29      
  30      $padStrLen = utf8_strlen($padStr);
  31      $padLen = $length - $inputLen;
  32      
  33      if ($type == STR_PAD_RIGHT) {
  34          $repeatTimes = ceil($padLen / $padStrLen);
  35          return utf8_substr($input . str_repeat($padStr, $repeatTimes), 0, $length);
  36      }
  37      
  38      if ($type == STR_PAD_LEFT) {
  39          $repeatTimes = ceil($padLen / $padStrLen);
  40          return utf8_substr(str_repeat($padStr, $repeatTimes), 0, floor($padLen)) . $input;
  41      }
  42      
  43      if ($type == STR_PAD_BOTH) {
  44          
  45          $padLen/= 2;
  46          $padAmountLeft = floor($padLen);
  47          $padAmountRight = ceil($padLen);
  48          $repeatTimesLeft = ceil($padAmountLeft / $padStrLen);
  49          $repeatTimesRight = ceil($padAmountRight / $padStrLen);
  50          
  51          $paddingLeft = utf8_substr(str_repeat($padStr, $repeatTimesLeft), 0, $padAmountLeft);
  52          $paddingRight = utf8_substr(str_repeat($padStr, $repeatTimesRight), 0, $padAmountLeft);
  53          return $paddingLeft . $input . $paddingRight;
  54      }
  55      
  56      trigger_error('utf8_str_pad: Unknown padding type (' . $type . ')',E_USER_ERROR);
  57  }