To use PHPMailer without relying on Composer, manually include the necessary class files for PHPMailer and the SMTP class. When you create a new PHPMailer instance, ensure that you include 'PHPMailer.php' and 'SMTP.php' through require or include statements in your PHP code. Additionally, import the SMTP class using 'use PHPMailerooleanSMTP;' to avoid class not found errors. Properly setting SMTP options like SMTPDebug requires having both classes available for use.
To use PHPMailer without Composer, you need to manually include required class files. Ensure you include 'SMTP.php' and 'PHPMailer.php' before using the classes.
When initializing a new PHPMailer instance, make sure to import the SMTP class using 'use PHPMailerooleanSMTP;' before usage. This resolves undefined class issues.
If you're getting an error for class SMTP not found, it indicates that the SMTP class file has not been included. Always include the SMTP class when using PHPMailer.
You can set SMTP options like SMTPDebug by accessing constants such as SMTP::DEBUG_SERVER after ensuring the class is loaded correctly.
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