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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 |
---|---|
128 |
|
129 | $user = get_userdata($user_ID); |
130 | return $user; |
131 | } |
132 | endif; |
133 |
|
134 | if ( !function_exists( 'wp_mail' ) ) : |
135 | function wp_mail( $to, $subject, $message, $headers = '' ) { |
136 | // Compact the input, apply the filters, and extract them back out |
137 | extract( apply_filters( 'wp_mail', compact( 'to', 'subject', 'message', 'headers' ) ) ); |
138 |
|
139 | global $phpmailer; |
140 |
|
141 | // (Re)create it, if it's gone missing |
142 | if ( !is_object( $phpmailer ) || !is_a( $phpmailer, 'PHPMailer' ) ) { |
143 | require_once ABSPATH . WPINC . '/class-phpmailer.php'; |
144 | require_once ABSPATH . WPINC . '/class-smtp.php'; |
145 | $phpmailer = new PHPMailer(); |
146 | } |