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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
apply_filters( "hook_name", "what_to_filter" )
.Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
Line | Code |
---|---|
166 | $phpmailer = new PHPMailer(); |
167 | } |
168 |
|
169 | $mail = compact('to', 'subject', 'message', 'headers'); |
170 | $mail = apply_filters('wp_mail', $mail); |
171 | extract($mail); |
172 |
|
173 | if ( $headers == '' ) { |
174 | $headers = "MIME-Version: 1.0\n" . |
175 | "From: " . apply_filters('wp_mail_from', "wordpress@" . preg_replace('#^www\.#', '', strtolower($_SERVER['SERVER_NAME']))) . "\n" . |
176 | "Content-Type: text/plain; charset=\"" . get_option('blog_charset') . "\"\n"; |
177 | } |
178 |
|
179 | $phpmailer->ClearAddresses(); |
180 | $phpmailer->ClearCCs(); |
181 | $phpmailer->ClearBCCs(); |
182 | $phpmailer->ClearReplyTos(); |
183 | $phpmailer->ClearAllRecipients(); |
184 | $phpmailer->ClearCustomHeaders(); |