PHP mail functions is one of its core feature. Thus, there is no extra installation required to use PHP mail functions. The only requirement is the installation of a working email system.
PHP mail() function:
PHP mail() function is used to send emails directly from a script.
To: This is a required parameter which specifies the receiver / receivers of an email in one of the following forms.
- [email protected]
- [email protected], [email protected]
- User1 <[email protected]>
- User1 <[email protected]>, User2 <[email protected]>
Subject: This is a required parameter which specifies the subject of a mail to send.
Message: This is a required parameter which specifies the message to be sent.
Headers: This is an optional parameter which specifies any additional headers, including From, Cc, and Bcc.
Parameters: This is an optional parameter which specifies any additional parameter to the sendmail program. When using -f sendmail option, it can be used to set the envelope sender address.
Features of PHP mail() function:
- Any newline character can not be used in the subject
- From header must be included in the header parameter while sending a mail.
- While using additional headers, all the headers should be separated with a CRLF (\r\n).
- In the message parameter, LF (\n) should be used for line separation.
- A maximum of 70 characters can be used in the lines of the message.