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                <?php  | 
            
                            
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                namespace P2A\YourMembership\Core;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                class Request  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public static $API_VERSION = '2.25';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public static $BASE_URL = 'https://api.yourmembership.com';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public static $callID = 1;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private $apiKey;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private $saPasscode;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private $version;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    function __construct(string $apiKey, string $saPasscode)  | 
            
                            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->apiKey = $apiKey;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->saPasscode = $saPasscode;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Create the Base Envelope for an API call to YourMembership  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @method buildBasePayload  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @author PA  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @date   2017-01-09  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return SimpleXMLElement  XML Envelope with necessary credential parameters  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function buildBasePayload() : \SimpleXMLElement  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        /*  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            <YourMembership>  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            <Version>2.25</Version>  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            <ApiKey>3D638C5F-CCE2-4638-A2C1-355FA7BBC917</ApiKey>  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            <CallID>001</CallID>  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            <SaPasscode>************</SaPasscode>  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            <Call Method="Sa.People.Profile.Get">  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                <ID>8D88D43A-B15B-4041-BEA0-89B05B2D9540</ID>  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            </Call>  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            </YourMembership>  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $xml = new \SimpleXMLElement('<YourMembership></YourMembership>'); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $xml->addChild('Version', self::$API_VERSION); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $xml->addChild('ApiKey', $this->apiKey); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $xml->addChild('CallID', self::$callID); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $xml->addChild('SaPasscode', $this->saPasscode); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $xml;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Generates the XML for a API method call within  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @method createCallPayload  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @author PA  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @date   2017-01-09  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param  string            $method    YourMembership API Function Name  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param  array             $arguments Array of Arguments to be passed as part of the YourMembership "Call"  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return \SimpleXMLElement  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function createCallPayload(string $method, array $arguments) : \SimpleXMLElement  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $call = new \SimpleXMLElement('<Call></Call>'); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $call->addAttribute('method',$method); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        foreach ($arguments as $key => $value) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $call->addChild($key,$value);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $call;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function buildXMLPayload(string $method, array $arguments) : \SimpleXMLElement  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $xml = $this->buildBasePayload();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $callPayload = $this->createCallPayload($method,$arguments);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->sxmlAppend($xml,$callPayload);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $xml;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Complete XML envelope  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @method call  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @author PA  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @date   2017-01-09  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param  string     $method    [description]  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param  array      $arguments [description]  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return [type]                [description]  | 
            
                            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function call(string $method, array $arguments) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $xml = $this->buildXMLPayload($method, $arguments);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        self::$callId++; //Update the Call ID as they need to be unique per call  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $xml;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Deep Copy for SimpleXML  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @method sxmlAppend  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @author PA  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @date   2017-01-09  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param  SimpleXMLElement $to  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param  SimpleXMLElement $from  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                     */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    private function sxmlAppend(\SimpleXMLElement $to, \SimpleXMLElement $from)  { | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $toDom = dom_import_simplexml($to);  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $fromDom = dom_import_simplexml($from);  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $toDom->appendChild($toDom->ownerDocument->importNode($fromDom, true));  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                };  | 
            
            
                                                        
            
                                    
            
            
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The PSR-1: Basic Coding Standard recommends that a file should either introduce new symbols, that is classes, functions, constants or similar, or have side effects. Side effects are anything that executes logic, like for example printing output, changing ini settings or writing to a file.
The idea behind this recommendation is that merely auto-loading a class should not change the state of an application. It also promotes a cleaner style of programming and makes your code less prone to errors, because the logic is not spread out all over the place.
To learn more about the PSR-1, please see the PHP-FIG site on the PSR-1.