WordPress Hide Editor

gistfile1.php

<?php
/**
 * Hide Editor
 */
function prefix_hide_editor() {

    // get post id
    if ( isset( $_GET['post'] ) ) :

        $post_id = $_GET['post'];

    elseif ( isset( $_POST['post_ID'] ) ) :

        $post_id = $_POST['post_ID'];

    endif;

    // bail since we have no post id
    if ( ! isset( $post_id ) ) return;

    // get page template
    $template_file = get_post_meta( $post_id, '_wp_page_template', true );

    // exclude page templates
    $exclude_templates = array(
        'tpl-templatename.php'
    );

    // exclude ids
    $exclude_ids = array( get_option( 'page_on_front' ) );

    // exclude custom post types
    $current_screen = get_current_screen();
    $screen_id      = $current_screen->post_type;
    $post_types     = array(
        'post_type'
    );

    if ( in_array( $template_file, $exclude_templates ) ||
         in_array( $post_id, $exclude_ids ) ||
         in_array( $screen_id, $post_types ) ) :
        ?>
        <style type="text/css">
            #postdivrich{ display: none; }
         </style>
        <?php

    endif;

}
add_action( 'admin_head', 'prefix_hide_editor' );