<?

class Validate {

    function email($email)
    {
        $regex = '/^((\"[^\"\f\n\r\t\v\b]+\")|([\w\!\#\$\%\&\'\*\+\-\~\/\^\`\|\{\}]+(\.[\w\!\#\$\%\&\'\*\+\-\~\/\^\`\|\{\}]+)*))@((\[(((25[0-5])|(2[0-4][0-9])|([0-1]?[0-9]?[0-9]))\.((25[0-5])|(2[0-4][0-9])|([0-1]?[0-9]?[0-9]))\.((25[0-5])|(2[0-4][0-9])|([0-1]?[0-9]?[0-9]))\.((25[0-5])|(2[0-4][0-9])|([0-1]?[0-9]?[0-9])))\])|(((25[0-5])|(2[0-4][0-9])|([0-1]?[0-9]?[0-9]))\.((25[0-5])|(2[0-4][0-9])|([0-1]?[0-9]?[0-9]))\.((25[0-5])|(2[0-4][0-9])|([0-1]?[0-9]?[0-9]))\.((25[0-5])|(2[0-4][0-9])|([0-1]?[0-9]?[0-9])))|((([A-Za-z0-9\-])+\.)+[A-Za-z\-]+))$/';
         if ( preg_match($regex, $email) ) {
            return true;
            } else 
        return false; 
    }

    function uploadedfile($elementValue)
    {
        if ((isset($elementValue['error']) && $elementValue['error'] == 0) ||
            (!empty($elementValue['tmp_name']) && $elementValue['tmp_name'] != 'none')) {
                return is_uploaded_file($elementValue['tmp_name']);
        } else {
                return false;
        } 
    }

    function isJPG($file) 
    {
        list($width, $height, $type, $attr) = getimagesize($file);        
        return 2 == $type;
    }

    function isImg($file) 
    {
        list($width, $height, $type, $attr) = getimagesize($file);        
        return in_array($type, array(1, 2, 3, 7, 8) ); // ,3
    }
    
    function maxImgSize($img, $max_width, $max_height)
    {
        list($width, $height, $type, $attr) = @getimagesize($img); 
        //@ TODO if max_width = 0 or max_height = 0
          if ($max_width < $width || $max_height < $height){
                return false;
            }
           return true; 
    }
    
    function url($url)
    {
        $regex = '/^((http|https|ftp):\/\/)?(([A-Z0-9][A-Z0-9_-]*)(\.[A-Z0-9][A-Z0-9_-]*)+)(:(\d+))?\/?/i';
         if ( preg_match($regex, $url) ) {
                return true;
            } else {
                return false; 
            }
    }
       
    function numeric($num)
    {
        $regex = '/(^-?\d\d*\.\d*$)|(^-?\d\d*$)|(^-?\.\d\d*$)/';
         if ( preg_match($regex, $num) ) {
                return true;
            } else {
                return false; 
            }
    }

    function lettersonly($num)
    {
        $regex = '/^[a-zA-Z]+$/';
        if ( preg_match($regex, $num) ) {
            return true;
        } else {
            return false; 
        }
    }

    function digitonly($num)
    {
        $regex = '/^[0-9]+$/';
        if ( preg_match($regex, $num) ) {
            return true;
        } else {
            return false; 
        }
    }

    function nopunctuation($num)
    {
        $regex = '/^[^().\/\*\^\?#!@$%+=,\"\'><~\[\]{}]+$/';
         if ( preg_match($regex, $num) ) {
                return true;
            } else {
                return false; 
            }
    }

    function name($name)
    {
        if (empty($name)) {
            return false;
        }
        return true; 
    }

    function required($value)
    {
        if ($value == '') {
            return false;
        }
        return true;
    }
}

?>