PHP is interacting with third-party interfaces through XML messages (sending XML, getting XML, and parsing XML steps)

　　

Developer side: Send requests and receive results

<?PHP//The following demo, the implementation of the following functions://1-developers need to determine whether a user exists, to request a third-party interface. 2-Communication with a third-party interface that transmits data in an XML format. The developer sends the user information in XML format to the third-party interface//3-third party interface gets the developer's XML data, through the data query, and then sends the result in the XML format to the developer. First detect if curl is supportedif(!extension_loaded("Curl")) {    Trigger_error("Sorry, please turn on the Curl function module!) ",E_user_error);}//Constructing XML$xmldata= "<?xml version= ' 1.0 ' encoding= ' UTF-8 '?><group><name> Zhang San </name><age>22</age> </group> ";//initial One Curl session$curl=curl_init ();//Set URLcurl_setopt ($curl, Curlopt_url, "http://localhost/demo/dealxml.php");//Set Send mode: Postcurl_setopt ($curl, Curlopt_post,true);//Set Send datacurl_setopt ($curl, Curlopt_postfields,$xmldata);//TRUE to return the information obtained by CURL_EXEC () as a string instead of a direct outputcurl_setopt ($curl, Curlopt_returntransfer,TRUE);//perform a Curl session (the returned data is XML)$return _xml= Curl_exec ($curl);//Turn off the Curl resource and release the system resourcesCurl_close ($curl);//Echo $return _xml;//exit;//prohibit referencing external XML entitiesLibxml_disable_entity_loader (true);//Convert the XML to a SimpleXML object, convert the SimpleXML object to JSON, and then convert the JSON to an array. $value _array= Json_decode (Json_encode (simplexml_load_string($return _xml, ' SimpleXMLElement ', libxml_nocdata),true);Echo"<pre>";Print_r($value _array);?>

Third-party interface: receives the request and returns the processing result

<?PHP//receive the transmitted data$fileContent=file_get_contents("Php://input"); ## # Convert XML to an array//prohibit referencing external XML entitiesLibxml_disable_entity_loader (true);//Convert the XML to a SimpleXML object, convert the SimpleXML object to JSON, and then convert the JSON to an array. $value _array= Json_decode (Json_encode (simplexml_load_string($fileContent, ' SimpleXMLElement ', libxml_nocdata),true);## # Get the value for business processing$name=$value _array[' Name '];$age=$value _array[' Age '];//determine if the user exists by querying## # Add the query results to the array$value _array[' result '] = 1;## # Convert the array to XML format, return$xml= "<?xml version= ' 1.0 ' encoding= ' UTF-8 '?><group>";foreach($value _array  as $key=$val){    if(Is_numeric($val)){        $xml. = "<".$key." > ".$val." </".$key." > "; }Else{        $xml. = "<".$key." ><! [cdata[].$val."]] ></".$key." > "; }}$xml. = "</group>";Echo $xml;?>

PHP is interacting with third-party interfaces through XML messages (sending XML, getting XML, and parsing XML steps)