What is the purpose of the SOAP WSDL file in PHP SOAP implementation?

The SOAP WSDL file in PHP SOAP implementation is used to define the structure of the SOAP messages exchanged between the client and the server. It provides a detailed description of the available web services, including the input and output parameters, data types, and endpoint URLs. The WSDL file acts as a contract between the client and server, ensuring that both parties understand how to communicate effectively. 

// Example code snippet showing how to use a WSDL file in PHP SOAP implementation
$wsdl = "http://example.com/service.wsdl";
$client = new SoapClient($wsdl, array('trace' => 1));

// Call a method from the web service
$response = $client->methodName($parameters);

// Process the response
echo $response;

Keywords

SOAP WSDL file PHP implementation purpose

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