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PHP Interview Questions
What is PHP mail() Function ?
The PHP mail() function is used to sending emails in user or client.  Email messages is very common for  web applications  (or) web sites, for example : sending a welcome email when a user create a new account on your website,  newsletters, registration purpose,  feedback or comments and contact from etc. 
Syntax :
mail($to, $subject, $message, $headers, $parameters);