如何寫無標題的wp_mail

Question

可以寫無標題的wp_mail嗎？

函數的用法是 <?php wp_mail($to, $subject, $message, $headers, $attachments); ?>

問：我可以這樣使用它？<?php wp_mail($to, $subject, $message); ?>

Answer 1

是的，如果你檢查參數$headers下面的文字表示，其(string or array) (optional)

$to 
(string or array) (required) The intended recipient(s). Multiple recipients may be specified using an array or a comma-separated string. 
Default: None 

$subject 
(string) (required) The subject of the message. 
Default: None 

$message 
(string) (required) Message content. 
Default: None 

$headers 
(string or array) (optional) Mail headers to send with the message. (advanced) 
Default: Empty 

$attachments 
(string or array) (optional) Files to attach: a single filename, an array of filenames, or a newline-delimited string list of multiple filenames. (advanced) 
Default: Empty 

來源： http://codex.wordpress.org/Function_Reference/wp_mail#Parameters

Answer 2

是的，你可以用它：

<?php wp_mail($to, $subject, $message); ?> 

$頭和$附件是默認是空的（他們是optionnal）。

Answer 3

是的，你可以使用這樣

<?php wp_mail($to, $subject, $message); ?> 

$頭是一個可選的參數