wp_network_admin_email_change_notification( string $option_name, string $new_email, string $old_email, int $network_id )

Compatibility

Present in every tracked release (6.7.7 to 7.1.0), and compiles on PHP 7.4 through 8.6-dev.

Parameters

$option_namestring

The relevant database option name.

$new_emailstring

The new network admin email address.

$old_emailstring

The old network admin email address.

$network_idint

ID of the network.

Performance profile

How much work a call to wp_network_admin_email_change_notification() does, and what it touches: the algorithmic scaling, the Zend instruction count per call across PHP versions, the hooks it hands control to, and the core code that calls it. Measured from the compiled opcodes, not a stopwatch, so every number is identical on any machine running the same PHP version, and every function in core is ranked by cost.

Cost class

Expensive

Sends mail via wp_mail().

Scaling

Constant

No loop in the body: the same number of instructions runs whatever you pass in.

Instructions

17–85

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 86.

Plugin surface

2 hooks

Third-party callbacks on 'send_network_admin_email_change_email', 'network_admin_email_change_email' run inside this call, and their cost is not bounded by anything here.

Called by

0

Nothing in core calls this; the cost is only what you spend yourself.

What it touches

• hookthird-party callbacksapply_filters()called directly
• optionnetwork optionget_site_option()called directly
• mailsends mailwp_mail()called directly

Further down the call graph this can also reach cache, serialize, query and transient. Those are the worst case, several calls deep and usually down an error path, not what a normal call pays.

What one call costs · 2 distinct outcomes

One number would be a lie: the work depends on which branch runs. These are every distinct cost wp_network_admin_email_change_notification() can have, taken from its control-flow graph on PHP 8.5.

Hooks and filters fired · 2

2 hooks fire while wp_network_admin_email_change_notification() runs, in this order:

1. 1
   apply_filters( send_network_admin_email_change_email )filterline 2830 (+18 into the body)

   Filters whether to send the network admin email change notification email.

2. 2
   apply_filters( network_admin_email_change_email )filterline 2883 (+71 into the body)

   Filters the contents of the email notification sent when the network admin email address is changed.

Uses · 6

• apply_filters()Calls the callback functions that have been added to a filter hook.
• __()Retrieves the translation of $text.
• wp_specialchars_decode()Converts a number of HTML entities into their special characters.
• get_site_option()Retrieve an option value for the current network based on name of option.
• home_url()Retrieves the URL for the current site where the front end is accessible.
• wp_mail()Sends an email, similar to PHP's mail function.

Source code

View on Trac ↗View on GitHub ↗

2812function wp_network_admin_email_change_notification( $option_name, $new_email, $old_email, $network_id ) {2813	$send = true;2814 2815	// Don't send the notification to the default 'admin_email' value.2816	if ( '[email protected]' === $old_email ) {2817		$send = false;2818	}2819 2820	/**2821	 * Filters whether to send the network admin email change notification email.2822	 *2823	 * @since 4.9.02824	 *2825	 * @param bool   $send       Whether to send the email notification.2826	 * @param string $old_email  The old network admin email address.2827	 * @param string $new_email  The new network admin email address.2828	 * @param int    $network_id ID of the network.2829	 */2830	$send = apply_filters( 'send_network_admin_email_change_email', $send, $old_email, $new_email, $network_id );2831 2832	if ( ! $send ) {2833		return;2834	}2835 2836	/* translators: Do not translate OLD_EMAIL, NEW_EMAIL, SITENAME, SITEURL: those are placeholders. */2837	$email_change_text = __(2838		'Hi,2839 2840This notice confirms that the network admin email address was changed on ###SITENAME###.2841 2842The new network admin email address is ###NEW_EMAIL###.2843 2844This email has been sent to ###OLD_EMAIL###2845 2846Regards,2847All at ###SITENAME###2848###SITEURL###'2849	);2850 2851	$email_change_email = array(2852		'to'      => $old_email,2853		/* translators: Network admin email change notification email subject. %s: Network title. */2854		'subject' => __( '[%s] Network Admin Email Changed' ),2855		'message' => $email_change_text,2856		'headers' => '',2857	);2858	// Get network name.2859	$network_name = wp_specialchars_decode( get_site_option( 'site_name' ), ENT_QUOTES );2860 2861	/**2862	 * Filters the contents of the email notification sent when the network admin email address is changed.2863	 *2864	 * @since 4.9.02865	 *2866	 * @param array $email_change_email {2867	 *     Used to build wp_mail().2868	 *2869	 *     @type string $to      The intended recipient.2870	 *     @type string $subject The subject of the email.2871	 *     @type string $message The content of the email.2872	 *         The following strings have a special meaning and will get replaced dynamically:2873	 *         - ###OLD_EMAIL### The old network admin email address.2874	 *         - ###NEW_EMAIL### The new network admin email address.2875	 *         - ###SITENAME###  The name of the network.2876	 *         - ###SITEURL###   The URL to the site.2877	 *     @type string $headers Headers.2878	 * }2879	 * @param string $old_email  The old network admin email address.2880	 * @param string $new_email  The new network admin email address.2881	 * @param int    $network_id ID of the network.2882	 */2883	$email_change_email = apply_filters( 'network_admin_email_change_email', $email_change_email, $old_email, $new_email, $network_id );2884 2885	$email_change_email['message'] = str_replace( '###OLD_EMAIL###', $old_email, $email_change_email['message'] );2886	$email_change_email['message'] = str_replace( '###NEW_EMAIL###', $new_email, $email_change_email['message'] );2887	$email_change_email['message'] = str_replace( '###SITENAME###', $network_name, $email_change_email['message'] );2888	$email_change_email['message'] = str_replace( '###SITEURL###', home_url(), $email_change_email['message'] );2889 2890	wp_mail(2891		$email_change_email['to'],

Changelog

Introduced in 4.9.0. Unchanged from 6.7.7 through 7.1.0.

1. 6.7.7
2. 6.8.8
3. 6.9.7
4. 7.0.4
5. 7.1.0

Signature, return type and hooks compared across 5 parsed releases.

About this page

Parsed data

Generated from the wordpress-develop 6.7.7 tag, from src/wp-includes/ms-functions.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.

Corrections

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