Question

get_page_by_title( string $page_title,  string $output = OBJECT,  string|array $post_type = 'page' )

Retrieve a page given its title.

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description

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参数

$page_title

(string) (Required) Page title

$output

(string) (Optional) The required return type. One of OBJECT, ARRAY_A, or ARRAY_N, which correspond to a WP_Post object, an associative array, or a numeric array, respectively.

Default value: OBJECT

$post_type

(string|array) (Optional) Post type or array of post types.

Default value: 'page'

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返回值

(WP_Post|array|null) WP_Post (or array) on success, or null on failure.

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源代码

File: wp-includes/post.php

function get_page_by_title( $page_title, $output = OBJECT, $post_type = 'page' ) {
	global $wpdb;

	if ( is_array( $post_type ) ) {
		$post_type = esc_sql( $post_type );
		$post_type_in_string = "'" . implode( "','", $post_type ) . "'";
		$sql = $wpdb->prepare( "
			SELECT ID
			FROM $wpdb->posts
			WHERE post_title = %s
			AND post_type IN ($post_type_in_string)
		", $page_title );
	} else {
		$sql = $wpdb->prepare( "
			SELECT ID
			FROM $wpdb->posts
			WHERE post_title = %s
			AND post_type = %s
		", $page_title, $post_type );
	}

	$page = $wpdb->get_var( $sql );

	if ( $page ) {
		return get_post( $page, $output );
	}
}

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更新日志

Version	description
2.1.0	Introduced.

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相关函数

Uses

• wp-includes/formatting.php: esc_sql()
• wp-includes/post.php: get_post()
• wp-includes/wp-db.php: wpdb::get_var()
• wp-includes/wp-db.php: wpdb::prepare()

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User Contributed Notes

1. Skip to note content You must log in to vote on the helpfulness of this noteVote results for this note: 0You must log in to vote on the helpfulness of this note Contributed by Codex

   Find Page ID to use with exclude in wp_list_pages

   This example will return the $page object for the page titled “About”. Then the $page->ID element is used to exclude the About page when listing pages.

   
   <?php 
   $page = get_page_by_title( 'About' );
   wp_list_pages( 'exclude=' . $page->ID );
   ?>
   

How To Find WordPress Page ID By Title Then Replace the_content()

In this example, we find the page id of “Sample Page” then replace the page’s the_content() with “Hello World!”

function my_content($content) {
	$page = get_page_by_title( 'Sample Page' );
	if ( is_page($page->ID) )
		$content = "Hello World!";
	return $content;
}
add_filter('the_content', 'my_content');