How can the absence of a mail server affect the functionality of the mail() function in PHP?

If the mail server is absent or not properly configured, the mail() function in PHP will not be able to send emails successfully. To solve this issue, you can specify a different SMTP server to use for sending emails within the PHP code. 

// Specify the SMTP server to use for sending emails
ini_set("SMTP","mail.example.com");

// Send email using the specified SMTP server
$to = "recipient@example.com";
$subject = "Test Email";
$message = "This is a test email.";
$headers = "From: sender@example.com";

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

Keywords

mail server mail() functionality PHP absence

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