发送一封电子邮件。
to
电子邮件收件人,或收件人列表。
本字符串的格式必须符合 RFC 2822。例如:
user@example.com |
user@example.com, anotheruser@example.com |
User <user@example.com> |
User <user@example.com>, Another User <anotheruser@example.com> |
subject
电子邮件的主题。
小心 |
本项不能包含任何换行符,否则邮件可能无法正确发送。 |
message
所要发送的消息。
行之间必须以一个 LF(\n)分隔。每行不能超过 70 个字符。
小心 | |
(Windows 下)当 PHP 直接连接到 SMTP 服务器时,如果在一行开头发现一个句号,则会被删掉。要避免此问题,将单个句号替换成两个句号。
|
additional_headers
(可选项)String to be inserted at the end of the email header.
This is typically used to add extra headers (From, Cc, and Bcc). Multiple extra headers should be separated with a CRLF (\r\n).
注意: When sending mail, the mail must contain a From header. This can be set with the
additional_headers
parameter, or a default can be set in php.ini.Failing to do this will result in an error message similar to Warning: mail(): "sendmail_from" not set in php.ini or custom "From:" header missing.
注意: If messages are not received, try using a LF (\n) only. Some poor quality Unix mail transfer agents replace LF by CRLF automatically (which leads to doubling CR if CRLF is used). This should be a last resort, as it does not comply with RFC 2822.
additional_parameters
(optional)
The additional_parameters
parameter
can be used to pass an additional parameter to the program configured
to use when sending mail using the sendmail_path
configuration setting. For example, this can be used to set the
envelope sender address when using sendmail with the
-f sendmail option.
The user that the webserver runs as should be added as a trusted user to the sendmail configuration to prevent a 'X-Warning' header from being added to the message when the envelope sender (-f) is set using this method. For sendmail users, this file is /etc/mail/trusted-users.
Returns TRUE if the mail was successfully accepted for delivery, FALSE otherwise.
It is important to note that just because the mail was accepted for delivery, it does NOT mean the mail will actually reach the intended destination.
版本 | 说明 |
---|---|
4.3.0 (Windows only) | All custom headers (like From, Cc, Bcc and Date) are supported, and are not case-sensitive. (As custom headers are not interpreted by the MTA in the first place, but are parsed by PHP, PHP < 4.3 only supported the Cc header element and was case-sensitive). |
4.2.3 |
The additional_parameters parameter is disabled in
safe_mode and the
mail() function will expose a warning message
and return FALSE when used.
|
4.0.5 |
The additional_parameters parameter was added.
|
例 3. Sending mail with an additional command line parameter.
The
|
例 4. Sending HTML email It is also possible to send HTML email with mail().
|
注意: The Windows implementation of mail() differs in many ways from the Unix implementation. First, it doesn't use a local binary for composing messages but only operates on direct sockets which means a MTA is needed listening on a network socket (which can either on the localhost or a remote machine).
Second, the custom headers like From:, Cc:, Bcc: and Date: are not interpreted by the MTA in the first place, but are parsed by PHP.
As such, the
to
parameter should not be an address in the form of "Something <someone@example.com>". The mail command may not parse this properly while talking with the MTA.
注意: Email with attachments and special types of content (e.g. HTML) can be sent using this function. This is accomplished via MIME-encoding - for more information, see this Zend article or the PEAR Mime Classes.
注意: It is worth noting that the mail() function is not suitable for larger volumes of email in a loop. This function opens and closes an SMTP socket for each email, which is not very efficient.
For the sending of large amounts of email, see the PEAR::Mail, and PEAR::Mail_Queue packages.