How to remove "add new" button from the editor page of a custom post type in wordpress?

Question

I have a custom post type named "jxta_home". I have removed add new button from the submenu and edit page by using the following code-

<?php
function disable_new_posts() {

    global $submenu;
    unset($submenu['edit.php?post_type=jxta_home'][10]);

    // Hide link on listing page
    if (isset($_GET['post_type']) && $_GET['post_type'] == 'jxta_home')  {
        echo '<style type="text/css">
        .page-title-action, .submitdelete { display:none; }
        </style>';
    } 
}

But the add new button is still showing on the inner editor page. I want to remove it from there too. How can I remove it from the inner editor page?

Answer 1

There is two option once is with css and another is will coding.

Option 1 :

function disable_new_posts() {
// Hide sidebar link
global $submenu;
unset($submenu['edit.php?post_type=jxta_home'][10]);

// Hide link on listing page
if (isset($_GET['post_type']) && $_GET['post_type'] == 'jxta_home') {
    echo '<style type="text/css">
    #favorite-actions, .add-new-h2, .tablenav { display:none; }
    </style>';
 }
}
add_action('admin_menu', 'disable_new_posts');

Option 2 :

You disable the add new capabilities while passing the parameter in the register post type.

The parameter is :

create_posts' => false

Assuming you have the code like below :

$args = array(
    'label'               => __( 'Custom Post Type', 'text_domain' ),
    'description'         => __( 'Custom Post Type', 'text_domain' ),
    'capability_type' => 'custom_post_type',
    'capabilities' => array(
        'create_posts' => false
    )
);
register_post_type( 'custom_post_type', $args );