What is the usage method of php curl_exec?

To execute a cURL session in PHP, use the curl_exec function. Here is a basic method for using the curl_exec function:

1. Create a cURL handle.

$ch = curl_init();

1. Configure cURL options, such as setting the URL, request method, and request headers.

curl_setopt($ch, CURLOPT_URL, 'http://example.com');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

1. Execute the cURL session and retrieve the response data.

$response = curl_exec($ch);

1. Check for any errors and retrieve error information.

if(curl_errno($ch)) {
    echo 'cURL error: ' . curl_error($ch);
}

1. Close the cURL session.

curl_close($ch);

Before using the curl_exec function, ensure that all necessary cURL options have been set correctly and the cURL handle has been initialized. The curl_exec function will execute the cURL request and return the response data, which can be processed as needed.