HTTP Request wrapper class

Request.class.php

<?php
/**
 * HTTP Request
 * Wrapper Class
 *
 * @author Marcel Pociot
 * @copyright Marcel Pociot 2009-2013
 */
namespace CR;

class Request{
  
	private static $instance;
	private $params = array();
	
	/**
	 * Constructor
	 *
	 */
	public function __construct(){
		$this->setParams();
	}
	protected function __clone(){}
	
	/**
	 * Returns the current instance of the request wrapper
	 *
	 * @return CR_Request instance
	 */
	public static function getInstance(){
		if(self::$instance == null) {
			self::$instance = new self();
		}
		return self::$instance;
	}
	
	/**
	 * Loads all Parameters from
	 * an array given
	 *
	 * @param array $settings
	 * @return boolean
	 */
	public function setParams($parameters = null){
		if(is_array($parameters)){
			$requestParameters = $parameters;
		} else {
			$requestParameters = $_REQUEST;
		}
		
		foreach ($requestParameters as $var => $value) {
			$this->params[$var] = $value;
		}
		
		return true;
	}
	
	/**
	 * Returns the value
	 * from the given variable
	 *
	 * @param string $var
	 * @return mixed
	 */
	public function __get($var){
		if( isset($this->params[$var]) ) {
		    $value = trim($this->params[$var]);
		    
		    if ( !empty($value) OR $value === 0 OR $value === '0') {
		    	return $this->params[$var];
		    }			
		}
		return false;
	}
	
	/**
	 * Fill params with array
	 * @param array $params
	 */
	public function fill(Array $params){
		$this->params = $params;
	}
	
	public function __set($var,$value) {
		$this->params[$var] = $value;
	}
	
	/**
	 * Returns var as integer or 0 instead
	 * @param string variable
	 * @return int
	 */
	public function getInt($var){
		if( key_exists($var, $this->params) ){
			return intval($this->params[$var]);

		}
		return 0;
	}
	
	/**
	 * Returns var as postivie integer or 0 instead
	 * @param string variable
	 * @return int
	 */
	public function getPositiveInt($var){
	    if( key_exists($var, $this->params) ){
			$intval = intval($this->params[$var]);
			if( $intval < 0 ) {
			    $intval = 0;
			}
		}
		return 0;
	}
	

	public function getFloat($var){
		if( isset($this->params[$var]) )
		{
			return floatval($this->params[$var]);
		} 
		return 0;
	}
	
	public function getString($var){
		if( is_string($this->params[$var]) ) {
			return $this->params[$var];
		}
		return false;
	}
	
	public function getTime($var){
		if( strtotime($this->params[$var]) ) {
			return strtotime($this->params[$var]);
		}
		return false;
	}
	
	public function getPassword($var,$minLength) {
		if( strlen($this->params[$var]) >= $minLength ) {
			return $this->params[$var];
		}
		return false;
	}
	
	public function getBool($var) {
		if( isset($this->params[$var]) ) {
			return '1';
		}
		return '0';
	}
	
	public function getArray($var){
		if( is_array($this->params[$var]) ) {
			return $this->params[$var];
		} else {
		    return array();
		}
	}
	
	public function getFromArray($arr, $key){
		if( is_array($this->params[$arr]) AND array_key_exists($key, $this->params[$arr]) ) {
			$value = trim($this->params[$arr][$key]);
			
		    if ( !empty($value)) {
		    	return $value;
		    }		
		} 
		
		return false;
	}	
	/**
	 * Get all request variables that contain
	 * a specific string!
	 *
	 * @param string $var
	 * @return array
	 */
	public function getLike($var) {
		$return = array();
		foreach ($this->params as $varey => $value) {
			if( strstr($varey,$var) ) {
				$return[$varey] = $value;
			}
		}
		return $return;
	}
	
	public function isBase64($var){
        $l = strlen($var);
        if ($l) {
            return $var[$l - 1] == '=' && preg_match('/[A-Za-z=\/\+]+/', $var);
        }
        return false;
	}
	
	public function checkEmail($var){
		$email = strtolower($var);
		if(!preg_match("/^([_[:alnum:]-]+)(\.[_[:alnum:]-]+)*@([[:alnum:]])([[:alnum:]\.-]+)([[:alnum:]])\.([[:alpha:]]{2,4})$/",$email)){
			return false;
		}else{
			return $email;
		}
	}
	
	public function decodeEmail($var){
		if( $this->isBase64($var) ){
			return base64_decode($var);
		} else {
			return $var;
		}
	}
	
	public function getEmail($var){
		if( !isset($this->params[$var]) ){
			return false;
		}

		$email = strtolower($this->params[$var]);
		if(!preg_match("/^([_[:alnum:]-]+)(\.[_[:alnum:]-]+)*@([[:alnum:]])([[:alnum:]\.-]+)([[:alnum:]])\.([[:alpha:]]{2,4})$/",$email)){
			return false;
		}else{
			return $email;
		}
	}
	
	public function getAz09($var){
		if(preg_match("/([^0-9a-z])/",strtolower($this->params[$var]))){
			return false;
		}else{
			return $this->params[$var];
		}
	}
	
	/**
	 * Get an alpha numeric string
	 *
	 * @param string $var
	 * @return string
	 */
	public function getAlNum($var){
        if(ctype_alnum(trim($this->params[$var]))){
            return $this->params[$var];
        }else{
            return false;
        }
    }

	public function hasUpload(){
		if( !$_FILES  ){
			return false;
		}
		
		foreach( $_FILES as $var => $v ){
			if( is_array( $v ) ) {
				if( $v['tmp_name'][0] ){
					return true;
				}
			}else{
				if( $v['tmp_name'] ){
					return true;
				}
			}
		}
		return false;

	}

	public function decr($var) {
		$intval = intval($this->params[$var]) - 1;
		if( $intval <= 0 ) {
		    $intval = 1;
		}
		return $intval;
	}
	
	public function incr($var) {
	    $var = $this->getInt($var);
	    if( $var == 0 ) {
	        $var = 1;
	    }
	    return $var+1;
	}
	
	public function toArray() {
		return $this->params;
	}
	
	public function toObject() {
		return (object)$this->params;
	}
	
	public function getDefault($field, $default = '') {
		if (isset($this->params[$field])) {
			return $this->params[$field];
		} else {
			return $default;
		}
	}
}