Character Functions

				
//**************************************
// Name: Character Functions
// Description:Functions like isalpha(), isdigit(), etc.These functions expect a character, such as 'a', or '?', not an integer. If you want to use integers, first convert the integer using the chr() function.Ported from ctype.h. by John
// By: PHP Code Exchange
//**************************************

<?php
/* Functions: Converted from <ctype.h>.
 * Author: John Millaway
 * 
 * Note: These functions expect a character,
 * such as 'a', or '?', not an integer.
 * If you want to use integers, first convert
 * the integer using the chr() function.
 *
 * Examples:
 * 
 * isalpha('a'); // returns 1
 * isalpha(chr(97)); // same thing
 *
 * isdigit(1); // NO!
 * isdigit('1'); // yes.
 */
function isalnum ($c){ global $ctype__; return ((($ctype__[( ord($c) )]&(01 | 02 | 04 )) != 0)?1:0);}
function isalpha ($c){ global $ctype__; return ((($ctype__[( ord($c) )]&(01 | 02 )) != 0)?1:0);}
function isascii ($c){ global $ctype__; return (((( ord($c) )<=0177) != 0)?1:0);}
function iscntrl ($c){ global $ctype__; return ((($ctype__[( ord($c) )]& 040 ) != 0)?1:0);}
function isdigit ($c){ global $ctype__; return ((($ctype__[( ord($c) )]& 04 ) != 0)?1:0);}
function isgraph ($c){ global $ctype__; return ((($ctype__[( ord($c) )]&(020 | 01 | 02 | 04 )) != 0)?1:0);}
function islower ($c){ global $ctype__; return ((($ctype__[( ord($c) )]& 02 ) != 0)?1:0);}
function isprint ($c){ global $ctype__; return ((($ctype__[( ord($c) )]&(020 | 01 | 02 | 04 | 0200 )) != 0)?1:0);}
function ispunct ($c){ global $ctype__; return ((($ctype__[( ord($c) )]& 020 ) != 0)?1:0);}
function isspace ($c){ global $ctype__; return ((($ctype__[( ord($c) )]& 010 ) != 0)?1:0);}
function isupper ($c){ global $ctype__; return ((($ctype__[( ord($c) )]& 01 ) != 0)?1:0);}
function isxdigit ($c){ global $ctype__; return ((($ctype__[( ord($c) )]&(0100 | 04 )) != 0)?1:0);}
$ctype__ = array(32,32,32,32,32,32,32,32,32,40,40,40,40,40,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,
 -120,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,4,4,4,4,4,4,4,4,4,4,16,16,16,16,16,16,
 16,65,65,65,65,65,65,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,16,16,16,16,16,
 16,66,66,66,66,66,66,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,16,16,16,16,32,
 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0);
?>