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  * Defines a set of function callbacks that have a pure C version available if
   7  * the "ctype" extension is available, but otherwise have PHP versions to use
   8  * (that are slower).
   9  *
  10  * The SQL Parser code relies heavily on these functions.
  11  *
  12  * @package    PhpMyAdmin-String
  13  * @subpackage Native
  14  */
  15 if (! defined('PHPMYADMIN')) {
  16     exit;
  17 }
  18
  19 /**
  20  * Returns length of string depending on current charset.
  21  *
  22  * @param string $string string to count
  23  *
  24  * @return int string length
  25  */
  26 function PMA_strlen($string)
  27 {
  28     return strlen($string);
  29 }
  30
  31 /**
  32  * Returns substring from string, works depending on current charset.
  33  *
  34  * @param string $string string to count
  35  * @param int    $start  start of substring
  36  * @param int    $length length of substring
  37  *
  38  * @return string the sub string
  39  */
  40 function PMA_substr($string, $start, $length = 2147483647)
  41 {
  42     return substr($string, $start, $length);
  43 }
  44
  45 /**
  46  * Returns postion of $needle in $haystack or false if not found
  47  *
  48  * @param string $haystack the string being checked
  49  * @param string $needle   the string to find in haystack
  50  * @param int    $offset   the search offset
  51  *
  52  * @return integer position of $needle in $haystack or false
  53  */
  54 function PMA_strpos($haystack, $needle, $offset = 0)
  55 {
  56     return strpos($haystack, $needle, $offset);
  57 }
  58
  59 /**
  60  * Make a string lowercase
  61  *
  62  * @param string $string the string being lowercased
  63  *
  64  * @return string the lower case string
  65  */
  66 function PMA_strtolower($string)
  67 {
  68     return strtolower($string);
  69 }
  70
  71 ?>