phpmyadmin/libraries/string_native.lib.php

   1 <?php
   2 /* vim: set expandtab sw=4 ts=4 sts=4: */
   3 /**
   4  * Specialized String Functions for phpMyAdmin
   5  *
   6  * Copyright 2002 Robin Johnson <robbat2@users.sourceforge.net>
   7  * http://www.orbis-terrarum.net/?l=people.robbat2
   8  *
   9  * Defines a set of function callbacks that have a pure C version available if
  10  * the "ctype" extension is available, but otherwise have PHP versions to use
  11  * (that are slower).
  12  *
  13  * The SQL Parser code relies heavily on these functions.
  14  *
  15  * @version $Id$
  16  */
  17
  18 /**
  19  * Returns length of string depending on current charset.
  20  *
  21  * @uses    strlen()
  22  * @param   string   string to count
  23  * @return  int      string length
  24  * @access  public
  25  * @author  nijel
  26  * @todo rename to PM_STR_len()
  27  */
  28 function PMA_strlen($string)
  29 {
  30     return strlen($string);
  31 }
  32
  33 /**
  34  * Returns substring from string, works depending on current charset.
  35  *
  36  * @uses    substr()
  37  * @param   string   string to count
  38  * @param   int      start of substring
  39  * @param   int      length of substring
  40  * @return  int      substring
  41  * @access  public
  42  * @author  nijel
  43  * @todo rename to PM_STR_sub()
  44  */
  45 function PMA_substr($string, $start, $length = 2147483647)
  46 {
  47     return substr($string, $start, $length);
  48 }
  49
  50 /**
  51  * returns postion of $needle in $haystack or false if not found
  52  *
  53  * @uses    strpos()
  54  * @param   string  $needle
  55  * @param   string  $haystack
  56  * @return  integer position of $needle in $haystack or false
  57  */
  58 function PMA_STR_pos($haystack, $needle, $offset = 0)
  59 {
  60     return strpos($haystack, $needle, $offset);
  61 }
  62
  63 /**
  64  * returns right most postion of $needle in $haystack or false if not found
  65  *
  66  * @uses    strrpos()
  67  * @param   string  $needle
  68  * @param   string  $haystack
  69  * @return  integer position of $needle in $haystack or false
  70  * @todo    add workaround for PHP < 5.0.0 only first char of $needle is used
  71  */
  72 function PMA_STR_rPos($haystack, $needle, $offset = 0)
  73 {
  74     return strrpos($haystack, $needle, $offset);
  75 }
  76
  77 ?>