How to load bootstrap script and style in function

Question

I converted bootstrap theme to wordpress. Now, I have a problem in loading the bootstrap scripts and style. This is my code in functions.php

   function wpbootstrap_scripts_with_jquery()
    {

        // Register the script like this for a theme:
        wp_register_script( 'custom-script', get_template_directory_uri() . '/js/bootstrap.js', array( 'jquery' ) );
        wp_enqueue_script( 'samplejs', get_template_directory_uri() . '/js/jquery.min.js', array( '' ) );
            wp_enqueue_script( 'samplejs', get_template_directory_uri() . '/js/clean-blog.min.js', array( '' ) );
        // For either a plugin or a theme, you can then enqueue the script:
        wp_enqueue_script( 'custom-script' );
    }

add_action( 'wp_enqueue_scripts', 'wpbootstrap_scripts_with_jquery' );

and i add this in my header

<?php wp_enqueue_script("jquery"); ?>

Additional question: What is the difference between wp_register and wp_enqueue? Please help me. Im beginner in using bootstrap.

Answer 1

All you need to do is enqueue them. Also, I recommend getting rid of your jquery import (the second wp_enqueue). WordPress includes jQuery by default, and you're already including it in the first script (because you have listed it as a dependency). Here's an example, but this enqueues jquery twice (the native jquery, and the bootstrap jquery):

function wpbootstrap_scripts_with_jquery()
{
    // Register the script like this for a theme:
    wp_enqueue_script( 'custom-script', get_stylesheet_directory_uri() . '/js/bootstrap.js', array( 'jquery' ) );
    wp_enqueue_script( 'bootstrap-jquery', get_stylesheet_directory_uri() . '/js/jquery.min.js' );
    wp_enqueue_script( 'blog-scripts', get_stylesheet_directory_uri() . '/js/clean-blog.min.js' );
}

add_action( 'wp_enqueue_scripts', 'wpbootstrap_scripts_with_jquery' );

The only reason you'd need to register the scripts before enqueue-ing them, is if one of the scripts is a dependency. From the docs:

wp_register_script() registers a script file in WordPress to be linked to a page later using the wp_enqueue_script() function, which safely handles the script dependencies.

Scripts that have been pre-registered using wp_register_script() do not need to be manually enqueued using wp_enqueue_script() if they are listed as a dependency of another script that is enqueued. WordPress will automatically include the registered script before it includes the enqueued script that lists the registered script's handle as a dependency.

Answer 2

you cas use "wp_enqueue_style" and "wp_enqueue_script".

for example:

function reg_scripts() {
    wp_enqueue_style( 'bootstrapstyle', get_template_directory_uri() . '/css/bootstrap.min.css' );
    wp_enqueue_style( 'bootstrapthemestyle', get_template_directory_uri() . '/css/bootstrap-theme.min.css' );
    wp_enqueue_script( 'bootstrap-script', get_template_directory_uri() . '/js/bootstrap.min.js', array(), true );
}
add_action('wp_enqueue_scripts', 'reg_scripts');