<?php
/*
*
* @class Base_Char
* @author zhangys
* @date 2012/06/25
*/
class Base_Var_Char
{
public static function isUpper ( $char )
{
$ascii = ord ( $char );
if( $ascii > 64 and $ascii < 91 ) return true;
return false;
}
public static function isLower ( $char )
{
$ascii = ord ( $char );
if( $ascii > 96 and $ascii < 123 ) return true;
return false;
}
public static function toUpper ( $char )
{
if ( self::isUpper ( $char ) ) return $char;
$ascii = ord ( $char );
return chr ( $ascii - 32 );
}
public static function toLower ( $char )
{
if ( self::isLower ( $char ) ) return $char;
$ascii = ord ( $char );
return chr ( $ascii + 32 );
}
}
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