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php-helpers

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<?php
 
        function is_ip($ip, $x = '(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)')
                {return (preg_match('/^'.$x.'.'.$x.'.'.$x.'.'.$x.'$/', $ip)) ? TRUE : FALSE;}
 
        function is(&$var)
                {return ((isset($var) && !is_null($var)) ? TRUE : FALSE);}
 
        function is_or(&$var, $default = NULL)
                {return ((is($var))? $var : $default);}
 
        function is_true(&$var1, &$var2 = TRUE)
                {return ((is($var1) && is($var2) && $var1 === $var2) ? TRUE : FALSE);}

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