What are some common pitfalls or challenges faced by PHP developers when working with SOAP?

One common challenge faced by PHP developers when working with SOAP is handling complex data structures or arrays. To solve this issue, developers can use the SOAPVar class to create custom SOAP data types and map them to PHP data types.

// Create a custom SOAP data type for handling arrays
$customArrayType = new SOAPVar($yourArray, SOAP_ENC_ARRAY, "Array", "http://www.w3.org/2001/XMLSchema", "array");

// Add the custom data type to the SOAP request
$soapClient->__soapCall("yourFunction", array($customArrayType));