phpmyadmin/libraries/stringMb.lib.php

   1 <?php
   2 /* vim: set expandtab sw=4 ts=4 sts=4: */
   3 /** String Functions for phpMyAdmin
   4  *
   5  * If mb_* functions don't exist, we create the ones we need and they'll use the
   6  * standard string functions.
   7  *
   8  * All mb_* functions created by pMA should behave as mb_* functions.
   9  *
  10  * @package PhpMyAdmin
  11  */
  12 if (! defined('PHPMYADMIN')) {
  13     exit;
  14 }
  15
  16 if (!@function_exists('mb_ord')) {
  17     /**
  18      * Perform a regular expression match
  19      *
  20      * Take care: might not work with lookbehind expressions.
  21      *
  22      * @param string $pattern Pattern to search for
  23      * @param string $subject Input string
  24      * @param int    $offset  Start from search
  25      *
  26      * @return int 1 if matched, 0 if doesn't, false on failure
  27      */
  28     function mb_preg_strpos($pattern, $subject, $offset = 0)
  29     {
  30         $matches = array();
  31         $bFind = preg_match(
  32             $pattern, mb_substr($subject, $offset), $matches, PREG_OFFSET_CAPTURE
  33         );
  34         if (1 !== $bFind) {
  35             return false;
  36         }
  37
  38         return $matches[1][1] + $offset;
  39     }
  40
  41     /**
  42      * Get the ordinal value of a string
  43      *
  44      * @param string $string the string for which ord is required
  45      *
  46      * @return int the ord value
  47      */
  48     function mb_ord($string)
  49     {
  50         if (false === $string || null === $string || '' === $string) {
  51             return 0;
  52         }
  53
  54         $str = mb_convert_encoding($string, "UCS-4BE", "UTF-8");
  55         $substr = mb_substr($str, 0, 1, "UCS-4BE");
  56         $val = unpack("N", $substr);
  57         return $val[1];
  58     }
  59
  60     /**
  61      * Get the character of an ASCII
  62      *
  63      * @param int $ascii the ASCII code for which character is required
  64      *
  65      * @return string the character
  66      */
  67     function mb_chr($ascii)
  68     {
  69         return mb_convert_encoding(
  70             pack("N", $ascii),
  71             mb_internal_encoding(),
  72             'UCS-4BE'
  73         );
  74     }
  75
  76 }