How to use cURL to send form data in a POST request?

To send form data in a POST request using cURL, follow these steps:

Set the Content-Type header to application/x-www-form-urlencoded to indicate that the data being sent is URL-encoded form data.
Combine the form fields and values into a single string in the format field1=value1&field2=value2&.... Make sure to properly URL-encode each field and value.
Use the -d or --data option followed by the form data string to specify the data that should be sent in the request body.
Use the -X POST option to specify the HTTP method as POST.
Specify the URL of the target endpoint after all the options.

Here's an example cURL command to send form data in a POST request:

curl -X POST \
     -H "Content-Type: application/x-www-form-urlencoded" \
     -d "field1=value1&field2=value2" \
     http://example.com/endpoint

Replace field1, field2, value1, value2, and http://example.com/endpoint with your actual form field names, values, and target endpoint URL.

Note: If the form data contains special characters that need to be URL-encoded, such as spaces or ampersands, you can use the --data-urlencode option instead of -d to automatically encode the form data:

curl -X POST \
     -H "Content-Type: application/x-www-form-urlencoded" \
     --data-urlencode "field1=value 1" \
     --data-urlencode "field2=value&2" \
     http://example.com/endpoint

This command automatically URL-encodes the values value 1 and value&2 in the form data.