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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 |
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1619 | $subject = __( 'New %1$s User: %2$s' ); |
1620 |
|
1621 | /** |
1622 | * Filters the subject of the welcome email after user activation. |
1623 | * |
1624 | * @since MU |
1625 | * |
1626 | * @param string $subject Subject of the email. |
1627 | */ |
1628 | $subject = apply_filters( 'update_welcome_user_subject', sprintf( $subject, $current_network->site_name, $user->user_login) ); |
1629 | wp_mail( $user->user_email, wp_specialchars_decode( $subject ), $message, $message_headers ); |
1630 |
|
1631 | if ( $switched_locale ) { |
1632 | restore_previous_locale(); |
1633 | } |
1634 |
|
1635 | return true; |
1636 | } |
1637 |
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