Filter hook 'pre_get_main_site_id'

Hook Information

Hook Parameters

Usage Examples

<?php
// Hook into pre_get_main_site_id
add_filter('pre_get_main_site_id', 'my_custom_filter', 10, 2);

function my_custom_filter($main_site_id, $network) {
    // Your custom filtering logic here
    return $main_site_id;
}

Source Code Context

<?php
 225  		 * @since 4.9.0
 226  		 *
 227  		 * @param int|null   $main_site_id If a positive integer is returned, it is interpreted as the main site ID.
 228  		 * @param WP_Network $network      The network object for which the main site was detected.
 229  		 */
 230  		$main_site_id = (int) apply_filters( 'pre_get_main_site_id', null, $this );
 231  
 232  		if ( 0 < $main_site_id ) {
 233  			return $main_site_id;
 234  		}
 235  

PHP Documentation

<?php
/**
		 * Filters the main site ID.
		 *
		 * Returning a positive integer will effectively short-circuit the function.
		 *
		 * @since 4.9.0
		 *
		 * @param int|null   $main_site_id If a positive integer is returned, it is interpreted as the main site ID.
		 * @param WP_Network $network      The network object for which the main site was detected.
		 */