Structured organization data for WordPress websites

functions.php

<?php

add_action('wp_head', 'fws_create_organisatie_data');
function fws_create_organisatie_data() {
	$data = array(
		'@context' => 'https://schema.org',
		'@type' => 'Organization',
		'name' => 'Bedrijfsnaam',
		'legalName' => 'Volledig bedrijfsnaam',
		'url' => 'https://www.website.nl/',
		'logo' => 'https://www.website.nl/images/logo.jpg',
		'foundingDate' => '2020',
		'address' => array(
			'@type' => 'PostalAddress',
			'streetAddress' => 'Hoofdstraat 1',
			'addressLocality' => 'Amsterdam',
			'addressRegion' => 'Noord-Holland',
			'postalCode' => '1000 AB',
			'addressCountry' => 'NL',
		),
		'contactPoint' = array(
			'@type' => 'ContactPoint',
			'contactType' => 'Customer Service',
			'telephone' => '+31-20-1234567',
			'email' => '[email protected]',
		),
		'sameAs' = array(
			'https://www.facebook.com/bedrijfsnaam',
			'https://www.linkedin.com/company/je-bedrijfsnaam/'
		)
	);
	echo '
<script type="application/ld+json">
'.json_encode($data, JSON_UNESCAPED_SLASHES).'
</script>
	';
}

More details:
https://developers.google.com/search/docs/appearance/structured-data/organization