Coupon validate methods

phpvalidate.php

<?php

namespace redeemFunctions;

class ValidateRedeem {
	/*
	  GetWebContent (Verwendet CURL PHP modul)
	  - ruft url auf -> JSON Rückgabe (JSON Decoder!)
	  - 1. Param = URL
	  - 2. Parm = Referenz fuer Statuscode
	*/
	public function getWebContent( $url, &$status ){
		$jsonRetVal = '';
	
		//use curl libs to get json object -> fill into $jsonRetVal                 
		$ch = curl_init(); 
	
		//set url 
		curl_setopt( $ch, CURLOPT_URL, $url ); 
	
		//return the transfer as a string 
		curl_setopt( $ch, CURLOPT_RETURNTRANSFER, 1 ); 
	
		//$output contains the output string 
		$output = curl_exec( $ch ); 
	
		//convert otput as json
		$jsonRetVal = json_decode( $output );
	
		//close curl resource to free up system resources 
		curl_close( $ch );  
	
		//set statusReference by extracting status from json object
		if ( isset( $jsonRetVal->redeemUrl ) ) {
				$status = true;
		} else {
				$status = false;
		}
	
		return $jsonRetVal;
	}
	
	/*
	  VaildateCoupons (Soll GetWebContent nutzen!)
	  - Nimmt String entgegen mit Coupons (fb1123, ggs123456, 12346568, t5q6aw2v) 
	  - Ruft Kiepenkerl UrL auf -> validate
	  - Rueckgabe 2 Dim Array -> Pos "InvalidCodes" als Array mit Codes, Pos "ValidCodes" als assoc Array-> Key CouponCode mit Praefix, Value Redeem URL. 
	*/
	public function validateCoupons( $coupons ){
		$invalidCodes = Array();
		$validCodes = Array();
	
		$validCouponChars = 'abcdezghijklmnopqrstuvwxyz1234567890';
		$couponsLength = strlen( $coupons );
		$foundCoupons = array();
		$stack = '';
		for( $x = 0; $x < $couponsLength; $x++ ) {
			$char = $coupons[ $x ];
			if ( false === strpos( $validCouponChars, strtolower( $char ) ) ) {
				if ( $stack ) {
					$foundCoupons[] = $stack;
				}
				$stack = null;
			} else {
				$stack .= $char;
			}
		}
	
		$requestedCode = strtok( $coupons, ',');
	
		foreach( $foundCoupons AS $coupon ) {
			$status = true; //true = valid, false = invalid
			$url = 'http://renes-workstation.local/~r.veldink/Kiepenkerl2/public/coupon;validate?coupon=' . trim( $coupon );
			$jsonReturn = $this->getWebContent( $url , $status);

			if ( !$status ) {
				$invalidCodes[] = trim( $requestedCode ) ;
				continue;
			}
			
			$validCodes[ trim( $requestedCode ) ] = isset( $jsonReturn->redeemUrl ) ? $jsonReturn->redeemUrl : null;
		}
	
		return Array( 'invalidCodes' => $invalidCodes, 'validCodes' => $validCodes );
	}
}