Change the From: email address in PHP mail()

To change the "From:" email address in the mail() function in PHP, you can use the additional_headers parameter to specify a custom "From:" header.

Here's an example of how to use the additional_headers parameter to specify a custom "From:" email address in the mail() function:

$to = "recipient@example.com";
$subject = "Test email";
$message = "This is a test email.";
$headers = "From: sender@example.com\r\n";

mail($to, $subject, $message, $headers);

This will send an email with the "From:" address set to "sender@example.com".

You can also specify additional headers in the $headers variable, such as the "Cc:" and "Bcc:" headers. For example:

$to = "recipient@example.com";
$subject = "Test email";
$message = "This is a test email.";
$headers = "From: sender@example.com\r\nCc: cc_recipient@example.com\r\nBcc: bcc_recipient@example.com\r\n";

mail($to, $subject, $message, $headers);