Arifur.bd

Hi, This is very easy issue. Just copy and pest this code in your functions.php at the bottom before closing php tag. ( ?> )

/**
 * Sample implementation of the Custom Header feature.
 *
 *
 * @link https://developer.ww.wp.xz.cn/themes/functionality/custom-headers/
 *
 * @package ecapress
 */

/**
 * Set up the WordPress core custom header feature.
 *
 * @uses tmbd_header_style()
 */
function tmbd_custom_header_setup() {
	add_theme_support( 'custom-header', apply_filters( 'tmbd_custom_header_args', array(
		'default-image'          => '', // If you want use a default Logo url get_template_directory_uri() . '/images/your-logo.png', Like this
		'width'                  => 250, // Set your logo Width
		'height'                 => 60,  // Set Your Logo Height
		'flex-height'            => true,
	) ) );
}
add_action( 'after_setup_theme', 'tmbd_custom_header_setup' );

After add this code you will get image upload option in Appearance Section like this http://awesomescreenshot.com/01d5jjusbb

You can add header image as logo to header.php like so … Where you want show it

<?php if ( get_header_image() ) : ?>
” rel=”home”>
<img src=”<?php header_image(); ?>” width=”<?php echo esc_attr( get_custom_header()->width ); ?>” height=”<?php echo esc_attr( get_custom_header()->height ); ?>” alt=””>

<?php endif; // End header image check. ?>

I Hope it will helpful for you.

Thanks.