Spanish Validations

validator.php

<?php
/*
Spanish information validator 
*/
class Validator {

	static function validarDni($cif) {
		//Copyright ©2005-2008 David Vidal Serra. Bajo licencia GNU GPL.
		//Este software viene SIN NINGUN TIPO DE GARANTIA; para saber mas detalles
		//puede consultar la licencia en http://www.gnu.org/licenses/gpl.txt(1)
		//Esto es software libre, y puede ser usado y redistribuirdo de acuerdo
		//con la condicion de que el autor jamas sera responsable de su uso.
		//Returns: 1 = NIF ok, 2 = CIF ok, 3 = NIE ok, -1 = NIF bad, -2 = CIF bad, -3 = NIE bad, 0 = ??? bad
		$cif = strtoupper($cif);
		for ($i = 0; $i < 9; $i ++)
			$num[$i] = substr($cif, $i, 1);
		//si no tiene un formato valido devuelve error
		if (!@ereg('((^[A-Z]{1}[0-9]{7}[A-Z0-9]{1}$|^[T]{1}[A-Z0-9]{8}$)|^[0-9]{8}[A-Z]{1}$)', $cif))
			return 0;
		//comprobacion de NIFs estandar
		if (@ereg('(^[0-9]{8}[A-Z]{1}$)', $cif))
			if ($num[8] == substr('TRWAGMYFPDXBNJZSQVHLCKE', substr($cif, 0, 8) % 23, 1))
				return 1;
			else
				return -1;
		
		//algoritmo para comprobacion de codigos tipo CIF
		$suma = $num[2] + $num[4] + $num[6];
		for ($i = 1; $i < 8; $i += 2)
			$suma += substr((2 * $num[$i]),0,1) + substr((2 * $num[$i]),1,1);
		
		$n = 10 - substr($suma, strlen($suma) - 1, 1);
		
		//comprobacion de NIFs especiales (se calculan como CIFs)
		if (@ereg('^[KLM]{1}', $cif))
			if ($num[8] == chr(64 + $n))
				return 1;
			else
				return -1;
				
		//comprobacion de CIFs
		if (@ereg('^[ABCDEFGHJNPQRSUVW]{1}', $cif))
			if ($num[8] == chr(64 + $n) || $num[8] == substr($n, strlen($n) - 1, 1))
				return 2;
			else
				return -2;
		
		//comprobacion de NIEs
		//T
		if (@ereg('^[T]{1}', $cif))
			if ($num[8] == @ereg('^[T]{1}[A-Z0-9]{8}$', $cif))
				return 3;
			else
				return -3;
		
		//XYZ
		if (@ereg('^[XYZ]{1}', $cif))
			if ($num[8] == substr('TRWAGMYFPDXBNJZSQVHLCKE', substr(str_replace(array('X','Y','Z'), array('0','1','2'), $cif), 0, 8) % 23, 1))
				return 3;
			else
				return -3;
			//si todavia no se ha verificado devuelve error
		
		return 0;
	}

	static function validarBI($bi) {
		if (preg_match('/^[0-9]{8,8}$/', $bi)) {
			return true;
		}
		return false;
	}
	
	static function validarPostal($codigo){
		if (preg_match('/^[0-9]{5,5}$/', $codigo)) {
			$codigo = (int)$codigo;
			if($codigo >= 52999){
				return false;
			}
			return true;
		}
		return false;
	}
	
	static function validarPostalPortugal($codigo){
		if (preg_match('/^[0-9]{4}-[0-9]{3}$/', $codigo)) {
			return true;
		}
		return false;
	}

	static function validarEmail($email){
		return filter_var($email, FILTER_VALIDATE_EMAIL);
	}

	static function validarTelefono($tel, $rule = 'all'){
		if(empty($tel)){ return false; }
		if(strlen($tel) != 9) { return false; }

		$regex = '/^[6789][0-9]{8,8}$/i';
		if($rule == 'mobile'){
			$regex = '/^[67][0-9]{8,8}$/i';
		} else if($rule == 'landline'){
			$regex = '/^9[0-9]{8,8}$/i';
		}

		if(!preg_match($regex, $tel)){
			return false;
		}
		return true;
	}

	static function validateFileSize($fileArray, $maxLength) {
		return $fileArray['size'] <= $maxLength;
	}

	static function validateFileExtension($fileArray, $allowedExtensions) {
		$ext = strtolower(end(explode('.', $fileArray['name'])));

	    if (!in_array($ext, $allowedExtensions)) {
	        return false;
	    }
	    
		return true;
	}
	
	/**
	 * Validate a date in many formats
	 * @param mixed $date The date to validate. 
	 *	It can be a DateTime, returns itself
	 *	It can be a string with formats: YYYY-MM-DD, DD/MM/YYYY
	 *	It can be an array with formats: array('year' => xx, 'month' => xx, 'day' => xx)
	 * @return mixed a Datetime object if correct, false if incorrect
	 */
	static function validateDate($date) {
		
		if (gettype($date) == 'object' && get_class($date) === 'DateTime') {
			return $date;
		}

		if (is_string($date) && preg_match('/\d{1,2}\/\d{1,2}\/\d{4}/i', $date)) {
			$date = trim($date);
			list($day, $month, $year) = explode('/', $date);
		} else if (is_string($date) && preg_match('/\d{4}\-\d{1,2}\-\d{1,2}/i', $date)) {
			$date = trim($date);
			list($year, $month, $day) = explode('-', $date);
		} else if (is_array($date)) {
			$year 	= @$date['year'];
			$month 	= @$date['month'];
			$day 	= @$date['day'];
		} else {
			return false;
		}

		if (!checkdate((int)$month, (int)$day, (int)$year)) {
			return false;
		}

		$obj = new \DateTime();
		$obj->setDate((int)$year, (int)$month, (int)$day);
		$obj->setTime(0, 0);

		return $obj;
	}

	static function validateAge($birthday, $minAge = 18, $curDate = null) {

		$birthday = self::validateDate($birthday);

		if ($birthday === false) {
			return false;
		}

		if (!$curDate) {
			$curDate = new DateTime();
		}

		$interval = $birthday->diff($curDate);

		if ($minAge > $interval->y) {
			return false;
		}

		return true;
	}

}

if (false) { // Poor man tests

	ini_set('assert.exception', 1);

	$res = Validator::validateDate('2015-02-10');
	assert(is_object($res));

	$res = Validator::validateDate('1/1/2000');
	assert(is_object($res));

	$res = Validator::validateDate('1/01/2000');
	assert(is_object($res));

	$res = Validator::validateDate(array('year' => 2000, 'month' => 2, 'day' => 23));
	assert(is_object($res));

	$res = Validator::validateDate('31/02/2000');
	assert($res === false);

	$res = Validator::validateDate('2015-02-30');
	assert($res === false);

	$res = Validator::validateDate('2015---1-30');
	assert($res === false);

	$res = Validator::validateDate(array('year' => 2000, 'month' => null, 'day' => 23));
	assert($res === false);

	$res = Validator::validateDate(array('year' => 2000, 'month' => 2));
	assert($res === false);

	$res = Validator::validateDate(array('year' => 2000, 'month' => 2, 'day' => 31));
	assert($res === false);

	$res = Validator::validateAge(new DateTime('2015-05-24'), 18, new DateTime('2016-05-24')); // 1 year old, not older than 18
	assert($res === false);

	$res = Validator::validateAge(new DateTime('2000-05-24'), 18, new DateTime('2016-05-24')); // 16 years old, not older than 18
	assert($res === false);

	$res = Validator::validateAge(new DateTime('1998-05-25'), 18, new DateTime('2016-05-24')); // 17.99 years old, not older than 18
	assert($res === false);

	$res = Validator::validateAge(new DateTime('1998-05-24'), 18, new DateTime('2016-05-24')); // 18 years old, older than 18
	assert($res === true);

	$res = Validator::validateAge(new DateTime('1998-05-23'), 18, new DateTime('2016-05-24')); // 18.1 years old, older than 18
	assert($res === true);

}