Test script for rendering a table for the 'site_logo' & theme mod 'custom_logo' options

test-trac53770.php

<?php

// Add this test script to wp-content/mu-plugins/test-trac53770.php
// Add the function into the theme where the site logo is rendered.

function test_trac53770_logo() {
	$theme   = get_option( 'stylesheet' );
	$mods    = get_theme_mods();
	$options = array(
		'get theme mods' => array(
			'logo_id' => isset( $mods['custom_logo'] ) ? $mods['custom_logo'] : false,
			'heading' => "get_option( 'theme_mods_{$theme}' )['custom_logo']",
		),
		'get_theme_mod' => array( 
			'logo_id' => get_theme_mod( 'custom_logo' ),
			'heading' => 'get_theme_mod( \'custom_logo\' )',
		),
		'site_logo'   => array(
			'logo_id' => get_option( 'site_logo' ),
			'heading' => 'get_option( \'site_logo\' )',
		),
	);
	
	?>
	<div class="trac53770-test" style="text-align: left; background-color: #000; padding: 15px; color: #fff;">
		<p>WordPress <?php echo get_bloginfo( 'version' ); ?> with <? echo $theme; ?></p>
		<table>
			<thead>
				<th>Option</th>
				<th>Logo ID</th>
				<th>Data Type</th>
			</thead>
			<tbody>
	<?php
	foreach ( $options as $option => $config ) :
		$heading = $config['heading'];
		$logo_id = $config['logo_id'];
		?>
		<tr>
			<td><?php echo $heading; ?></td>
			<?php if ( false !== $logo_id ) : ?>
				<td style="text-align: center"><?php echo $logo_id; ?></td>
				<td style="text-align: center"><?php echo gettype( $logo_id ); ?></td>
			<?php else : ?>
				<td style="text-align: center">-</td>
				<td style="text-align: center">-</td>
			<?php endif; ?>
		</tr>
	<?php endforeach ?>
			</tbody>
		</table>
	</div>
	<?php
}