[WordPress - Access restriction without plugins] #access #restrict #wp #core #collection #bestof #redirect #roles

wp--restrict-access-noplugin--01--restrict-access-to-wp-admin-page.php

<?php
// Use the $pagenow global.
  
if( is_admin() ) {
    add_filter( 'init', 'custom_restrict_pages_from_admin' );
}

function custom_restrict_pages_from_admin() {
  
    global $pagenow;

    $arr = array(
        'update-core.php',
        'edit.php'
    );

    if( custom_check_user_roles() && in_array( $pagenow , $arr ) ) {
        //echo some custom messages or call the functions 
    } else {
        echo 'This page has restricted access to specific roles';
        wp_die();
    }
  
}

function custom_check_user_roles() {
  
    //restrict pages by user role  
	return ( 
      current_user_can( 'administrator' ) || 
      current_user_can( 'editor' ) 
    );

}