wp-admin/includes/post.php:858Determines if a post exists based on title, content, date and type.
$titlestring$contentstringoptional''$datestringoptional''$typestringoptional''$statusstringoptional''intfunction post_exists( $title, $content = '', $date = '', $type = '', $status = '' ) { 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' ) ); $post_type = wp_unslash( sanitize_post_field( 'post_type', $type, 0, 'db' ) ); $post_status = wp_unslash( sanitize_post_field( 'post_status', $status, 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( $type ) ) { $query .= ' AND post_type = %s'; $args[] = $post_type; } if ( ! empty( $status ) ) { $query .= ' AND post_status = %s'; $args[] = $post_status; } if ( ! empty( $args ) ) { return (int) $wpdb->get_var( $wpdb->prepare( $query, $args ) ); } return 0;}Introduced in 2.0.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-admin/includes/post.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.