In the context of PHP SOAP calls, what are some common issues that developers face and how can they be resolved efficiently?

Issue: One common issue developers face with PHP SOAP calls is the "SOAP-ERROR: Parsing WSDL" error, which occurs when the WSDL URL is incorrect or inaccessible. To resolve this issue, ensure that the WSDL URL is correct and accessible.

$options = array(
    'trace' => 1,
    'exceptions' => 1
);

try {
    $client = new SoapClient("http://example.com/service.wsdl", $options);
} catch (SoapFault $e) {
    echo "Error: " . $e->getMessage();
}