phpmyadmin/libraries/string_type_ctype.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 CType
  14  */
  15 if (! defined('PHPMYADMIN')) {
  16     exit;
  17 }
  18
  19 /**
  20  * Checks if a character is an alphanumeric one
  21  *
  22  * @param string $c character to check for
  23  *
  24  * @return boolean whether the character is an alphanumeric one or not
  25  */
  26 function PMA_STR_isAlnum($c)
  27 {
  28     return ctype_alnum($c);
  29 } // end of the "PMA_STR_isAlnum()" function
  30
  31 /**
  32  * Checks if a character is an alphabetic one
  33  *
  34  * @param string $c character to check for
  35  *
  36  * @return boolean whether the character is an alphabetic one or not
  37  */
  38 function PMA_STR_isAlpha($c)
  39 {
  40     return ctype_alpha($c);
  41 } // end of the "PMA_STR_isAlpha()" function
  42
  43 /**
  44  * Checks if a character is a digit
  45  *
  46  * @param string $c character to check for
  47  *
  48  * @return boolean whether the character is a digit or not
  49  */
  50 function PMA_STR_isDigit($c)
  51 {
  52     return ctype_digit($c);
  53 } // end of the "PMA_STR_isDigit()" function
  54
  55 /**
  56  * Checks if a character is an upper alphabetic one
  57  *
  58  * @param string $c character to check for
  59  *
  60  * @return boolean whether the character is an upper alphabetic one or not
  61  */
  62 function PMA_STR_isUpper($c)
  63 {
  64     return ctype_upper($c);
  65 } // end of the "PMA_STR_isUpper()" function
  66
  67
  68 /**
  69  * Checks if a character is a lower alphabetic one
  70  *
  71  * @param string $c character to check for
  72  *
  73  * @return boolean whether the character is a lower alphabetic one or not
  74  */
  75 function PMA_STR_isLower($c)
  76 {
  77     return ctype_lower($c);
  78 } // end of the "PMA_STR_isLower()" function
  79
  80 /**
  81  * Checks if a character is a space one
  82  *
  83  * @param string $c character to check for
  84  *
  85  * @return boolean whether the character is a space one or not
  86  */
  87 function PMA_STR_isSpace($c)
  88 {
  89     return ctype_space($c);
  90 } // end of the "PMA_STR_isSpace()" function
  91
  92 /**
  93  * Checks if a character is an hexadecimal digit
  94  *
  95  * @param string $c character to check for
  96  *
  97  * @return boolean whether the character is an hexadecimal digit or not
  98  */
  99 function PMA_STR_isHexDigit($c)
 100 {
 101     return ctype_xdigit($c);
 102 } // end of the "PMA_STR_isHexDigit()" function
 103
 104 ?>