wordpress函数post_exists()用法示例

post_exists( string $title,  string $content = '',  string $date = '' )

Determine if a post exists based on title, content, and date

描述

参数

$title

(string)
(Required)
Post title

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$content

(string)
(Optional)
post content

Default value: ”

$date

(string)
(Optional)
post date

Default value: ”

返回值

(int) Post ID if post exists, 0 otherwise.

源代码

File: wp-admin/includes/post.php

function post_exists($title, $content = '', $date = '') {
	global $wpdb;

	$post_title = wp_unslash( sanitize_post_field( 'post_title', $title, 0, 'db' ) );
	$post_content = wp_unslash( sanitize_post_field( 'post_content', $content, 0, 'db' ) );
	$post_date = wp_unslash( sanitize_post_field( 'post_date', $date, 0, 'db' ) );

	$query = "SELECT ID FROM $wpdb->posts WHERE 1=1";
	$args = array();

	if ( !empty ( $date ) ) {
		$query .= ' AND post_date = %s';
		$args[] = $post_date;
	}

	if ( !empty ( $title ) ) {
		$query .= ' AND post_title = %s';
		$args[] = $post_title;
	}

	if ( !empty ( $content ) ) {
		$query .= ' AND post_content = %s';
		$args[] = $post_content;
	}

	if ( !empty ( $args ) )
		return (int) $wpdb->get_var( $wpdb->prepare($query, $args) );

	return 0;
}

更新日志

相关函数

Uses

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