Various validation class

Created by Jose Chafardet, last update on 30/10/2008 11:37

This is yet again a small class i wrote (still working on it) that validates some input data (not perfect tho, i know, but im still working on it).

//==================
// Define class name
class Validation {
	//===========
	// Properties
	//==================
	// Public properties
	public $str;
	public $length;
	//========
	// Methods
	//============================
	// Public method alpha_numeric
	public function alpha_numeric($str, $length) {
		if (empty ( $str )) {
			return false;
		}
		if (strlen ( $str ) < $length) {
			return false;
		}
		return (! preg_match ( "/^([-a-z0-9])+$/i", $str )) ? FALSE : TRUE;
	} // end public method alpha_numeric
	//======================================================
	// Public method valid_email
	// validates to accept only valid email addresses,
	// requiring an @ a . and at the very least 2 TLD leters
	public function valid_email($str) {
		if (empty ( $str )) {
			return false;
		}
		return (! preg_match (
"/^([a-z0-9\+_\-]+)(\.[a-z0-9\+_\-]+)*@([a-z0-9\-]+\.)+[a-z]{2,6}$/ix"
, $str )) ? FALSE : TRUE;
	} // end public method valid_email
	//========================================
	// Public method numeric
	// validates to accept only numeric values
	public function numeric($str, $length) {
		if (empty ( $str )) {
			return false;
		}
		if (strlen ( $str ) < $length) {
			return false;
		}
		return (! preg_match ( "/^([0-9])+$/i", $str )) ? FALSE : TRUE;
	} // end public method numeric
	//========================================
	// public method latin_chars
	public function latin_chars($str) {
		$html_entities = array (
			"&"	=>	"&",
			"á"	=>	"�",
			"Â"	=>	"�",
			"â"	=>	"�",
			"Æ"	=>	"�",
			"æ"	=>	"�",
			"À"	=>	"�",
			"à"	=>	"�",
			"Å"	=>	"�",
			"å"	=>	"�",
			"Ã"	=>	"�",
			"ã"	=>	"�",
			"Ä"	=>	"�",
			"ä"	=>	"�",
			"Ç"	=>	"�",
			"ç"	=>	"�",
			"É"	=>	"�",
			"é"	=>	"�",
			"Ê"	=>	"�",
			"ê"	=>	"�",
			"È"	=>	"�",
			"í"	=>	"�",
			"Í"	=>	"�",
			"ó"	=>	"�",
			"Ó"	=>	"�",
			"ö"	=>	"�",
			"ú" =>	"�",
			"Ú"	=>	"�",
			"û"	=>	"�",
			"Ù"	=>	"�",
			"ù"	=>	"�",
			"Ü"	=>	"�",
			"ü"	=>	"�",
			"Ý"	=>	"�",
			"ý"	=>	"�",
			"ÿ"	=>	"�",
			"Ÿ"	=>	"&Yuml;",
			"ñ"	=>	"�",
			"Ñ"	=>	"�",
		);
		foreach ($html_entities as $key => $value) {
			$str = str_replace($key, $value, $str);
    	}// end foreach
    	return $str;
	} // end public method latin_chars
	//=============================
	// Public method sanitize_mysql
	// sanitize data input
	public function sanitize($str) {
		$str = mysql_real_escape_string ( $str );
		return $str;
	} // end public method sanitize_mysql
} // end class

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