configure php to send mail using SMTP


I need to configure a script to send mail using php.
I am using a gmail account!
On the config file I need to input:


define('MAILER', "smtp");
define('SMTP_HOST', "");
define('SMTP_PORT', 0);
define('SMTP_USERNAME', "");
define('SMTP_PASSWORD', "my_pass");
define('SMTP_ENCRYPTION', "");

I don't know what to write for: SMTP_HOST, SMTP_PORT, SMTP_ENCRYPTION
Can you please help me!

Qw MAsked:
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Dave BaldwinFixer of ProblemsCommented:
I don't know which library you are using.  PHPMailer has a demo page for sending thru your Gmail account.

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