Question

rel_canonical()

Outputs rel=canonical for singular queries.

---

description

---

源代码

File: wp-includes/link-template.php

function rel_canonical() {
	if ( ! is_singular() ) {
		return;
	}

	$id = get_queried_object_id();

	if ( 0 === $id ) {
		return;
	}

	$url = wp_get_canonical_url( $id );

	if ( ! empty( $url ) ) {
		echo '<link rel="canonical" href="' . esc_url( $url ) . '" />' . "\n";
	}
}

---

更新日志

Version	description
4.6.0	Adjusted to use wp_get_canonical_url().
2.9.0	Introduced.

---

相关函数

Uses

• wp-includes/link-template.php: wp_get_canonical_url()
• wp-includes/formatting.php: esc_url()
• wp-includes/query.php: is_singular()
• wp-includes/query.php: get_queried_object_id()

---

User Contributed Notes