How can configuration files like sendmail.ini or account details be properly set up in PHP to ensure successful email sending?

To properly set up configuration files like sendmail.ini or account details in PHP for successful email sending, you can use the PHP `ini_set()` function to dynamically set configuration options at runtime. This allows you to specify settings such as the SMTP server, email address, and password without directly editing the configuration files.

// Set SMTP server configuration
ini_set('SMTP', 'smtp.example.com');
ini_set('smtp_port', 25);

// Set email account details
ini_set('sendmail_from', 'your_email@example.com');
ini_set('sendmail_path', '/usr/sbin/sendmail -t -i');