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Edit File: validation.class.php

<?
class validation
{
	function validateAlphabetsAndDigits($val, $label)
	{
		$error = null;
		if (preg_match('/[A-Za-z]/', $val) && preg_match('/[0-9]/', $val))
		{
			return null;
		}
		else
			return 'Please enter a valid '.$label.'. It must contans Digits and Aplhabets! ';
		
	}
	function characters_validation($val, $label)
	{
		$error = null;
		if (ctype_alpha($val) === false)
		{
			$error = 'Please enter a valid '.$label.'. It must be characters only! ';
		}
		return $error;
	}
	function name_validation($name, $field = 'Name', $min_length = 3, $max_length = 33)
	{
		// Full Name must contain letters, dashes and spaces only. We have to eliminate dash at the begining of the name.
		$name = trim($name);
		if (strlen($name) >= $min_length )
		{
			if (strlen($name) <= $max_length )
			{
				if(preg_match("/^[a-zA-Z][a-zA-Z -]+$/", $name) === 0)
					$error = $field.' must contain letters, dashes and spaces only. We do not accept dash at the begining of the '.$field.'! ';
				else $error = null;
			}else $error = $field.' must contain less than '.$max_length.' letters! ';
		}else $error = $field.' must contain at least '.$min_length.' letters! ';
		return $error;
		/*
		if we want to impose the Full Name to start with upper case letter we have to use that:
		if(preg_match("/^[A-Z][a-zA-Z -]+$/", $name) === 0)
		*/
	}
	
	function email_validation($email, $email_label)
	{
		//E-mail validation: We use regexp to validate email.
		$email = trim($email);
		if (strlen($email) >= 1 )
		{
			//if(preg_match("/^[a-zA-Z]\w+(\.\w+)*\@\w+(\.[0-9a-zA-Z]+)*\.[a-zA-Z]{2,4}$/", $email) === 0)
			$isValid = (bool)preg_match("`^[a-z0-9!#$%&'*+\/=?^_\`{|}~-]+(?:\.[a-z0-9!#$%&'*+\/=?^_\`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?$`i", trim($email));
			if(!$isValid)
				$error = 'Please enter a valid '.$email_label.'! ';
			else
				$error = null;
		}
		else
			$error = 'Please enter '.$email_label.'! ';
		
		return $error;
	}
	
	function digits_validation($digits, $digits_label)
	{
		//Value must be digits.
		$digits = trim($digits);
		if (strlen($digits) >= 1 )
		{
			if(preg_match("/^[0-9]+$/", $digits) === 0)
				$error = 'Please enter a valid '.$digits_label.'. It must be Digits only! ';
			else $error = null;
		}else $error = 'Please enter '.$digits_label.'! ';
		
		return $error;
	}
	
	function username_validation($username, $username_label)
	{
		//User must be digits and letters.
		$username = trim($username);
		if (strlen($username) >= 1 )
		{
			if(preg_match("/^[0-9a-zA-Z_@.-]{3,}$/", $username) === 0)
				$error = $username_label.' must be digits and letters and at least 3 characters! ';
			else $error = null;
		}else $error = 'Please enter '.$username_label.'! ';
		
		return $error;
	}
	
	function date_validation($date, $date_label)
	{
		//Date must be with this form: YYYY-MM-DD.
		$date = trim($date);
		if (strlen($date) >= 1 )
		{
			if(preg_match("/^[0-9]{4}-[0-9]{1,2}-[0-9]{1,2}$/", $date) === 0)
				$error = $date_label.' Date must be with this form: YYYY-MM-DD! ';
			else $error = null;
		}else $error = 'Please enter '.$date_label.'! ';
		
		return $error;
	}
	
	function address_validation($address, $required, $address_label)
	{
		//Address must be only letters, numbers or one of the following ". , : /"
		$address = trim($address);
		if (strlen($address_label) == 0) $address_label = 'address';
		
		if (strlen($address) >= 1)
		{
			if(preg_match("/^[a-zA-Z0-9 _.,:\"\']+$/", $address) === 0)
				$error = 'Please enter a valid '.$address_label.'! ';
			else $error = null;
		}elseif ($required == true) 
			$error = 'Please enter '.$address_label.'! ';
		else $error = null;
		
		return $error;
	}
	
	function password_validation($password, $level, $password_label)
	{
		$password = trim($password);
		switch ($level)
		{
			//Password must be at least 8 characters
			case 0:
			if (strlen($password) >= 1 )
			{
				if(preg_match("/^.*(?=.{8,}).*$/", $password) === 0)
					$error = $password_label.' must be at least 8 characters! ';
				else $error = null;
			}else $error = 'Please enter '.$password_label.'! ';
			
			break;
			
			//Password must be at least 8 characters and at least one digit.
			case 1:
			if (strlen($password) >= 1 )
			{
				if(preg_match("/^.*(?=.{8,})(?=.*[0-9]).*$/", $password) === 0)
					$error = $password_label.' must be at least 8 characters and one digit! ';
				else $error = null;
			}else $error = 'Please enter '.$password_label.'! ';
			
			break;
			
			//Password must be at least 8 characters and must contain at least one lower case letter, one upper case letter and one digit(alphanumeric).
			case 2:
			if (strlen($password) >= 1 )
			{
				if(preg_match("/^.*(?=.{8,})(?=.*[0-9])(?=.*[a-z])(?=.*[A-Z]).*$/", $password) === 0)
					$error = 'Password must be at least 8 characters and must contain at least one lower case letter, one upper case letter and one digit! ';
				else $error = null;
			}else $error = 'Please enter '.$password_label.'!! ';
			
			break;
		
			default:
			$error = null;
			break;			
		}
		return $error;
	}
};
?>