diff --git a/src/wp-includes/post.php b/src/wp-includes/post.php
index 7feb284e85b0a..35980b36dfb29 100644
--- a/src/wp-includes/post.php
+++ b/src/wp-includes/post.php
@@ -3345,12 +3345,12 @@ function wp_insert_post( $postarr, $wp_error = false ) {
 
 	unset( $postarr['filter'] );
 
-	$postarr = sanitize_post( $postarr, 'db' );
+	$postarr          = sanitize_post( $postarr, 'db' );
+	$original_postarr = $postarr;
 
 	// Are we updating or creating?
 	$post_ID = 0;
 	$update  = false;
-	$guid    = $postarr['guid'];
 
 	if ( ! empty( $postarr['ID'] ) ) {
 		$update = true;
@@ -3365,29 +3365,26 @@ function wp_insert_post( $postarr, $wp_error = false ) {
 			return 0;
 		}
 
-		$guid            = get_post_field( 'guid', $post_ID );
+		$postarr['guid'] = get_post_field( 'guid', $post_ID );
 		$previous_status = get_post_field( 'post_status', $post_ID );
 	} else {
 		$previous_status = 'new';
 	}
 
-	$post_type = empty( $postarr['post_type'] ) ? 'post' : $postarr['post_type'];
+	if ( empty( $postarr['post_type'] ) ) {
+		$postarr['post_type'] = 'post';
+	}
 
-	$post_title   = $postarr['post_title'];
-	$post_content = $postarr['post_content'];
-	$post_excerpt = $postarr['post_excerpt'];
-	if ( isset( $postarr['post_name'] ) ) {
-		$post_name = $postarr['post_name'];
-	} elseif ( $update ) {
+	if ( ! isset( $postarr['post_name'] ) && $update ) {
 		// For an update, don't modify the post_name if it wasn't supplied as an argument.
-		$post_name = $post_before->post_name;
+		$postarr['post_name'] = $post_before->post_name;
 	}
 
-	$maybe_empty = 'attachment' !== $post_type
-		&& ! $post_content && ! $post_title && ! $post_excerpt
-		&& post_type_supports( $post_type, 'editor' )
-		&& post_type_supports( $post_type, 'title' )
-		&& post_type_supports( $post_type, 'excerpt' );
+	$maybe_empty = 'attachment' !== $postarr['post_type']
+		&& ! $postarr['post_content'] && ! $postarr['post_title'] && ! $postarr['post_excerpt']
+		&& post_type_supports( $postarr['post_type'], 'editor' )
+		&& post_type_supports( $postarr['post_type'], 'title' )
+		&& post_type_supports( $postarr['post_type'], 'excerpt' );
 
 	/**
 	 * Filters whether the post should be considered "empty".
@@ -3413,23 +3410,26 @@ function wp_insert_post( $postarr, $wp_error = false ) {
 		}
 	}
 
-	$post_status = empty( $postarr['post_status'] ) ? 'draft' : $postarr['post_status'];
-	if ( 'attachment' === $post_type && ! in_array( $post_status, array( 'inherit', 'private', 'trash', 'auto-draft' ), true ) ) {
-		$post_status = 'inherit';
+	if ( empty( $postarr['post_status'] ) ) {
+		$postarr['post_status'] = 'draft';
+	}
+
+	if ( 'attachment' === $postarr['post_type'] && ! in_array( $postarr['post_status'], array( 'inherit', 'private', 'trash', 'auto-draft' ), true ) ) {
+		$postarr['post_status'] = 'inherit';
 	}
 
 	if ( ! empty( $postarr['post_category'] ) ) {
 		// Filter out empty terms.
-		$post_category = array_filter( $postarr['post_category'] );
+		$postarr['post_category'] = array_filter( $postarr['post_category'] );
 	}
 
 	// Make sure we set a valid category.
-	if ( empty( $post_category ) || 0 == count( $post_category ) || ! is_array( $post_category ) ) {
+	if ( empty( $postarr['post_category'] ) || 0 == count( $postarr['post_category'] ) || ! is_array( $postarr['post_category'] ) ) {
 		// 'post' requires at least one category.
-		if ( 'post' == $post_type && 'auto-draft' != $post_status ) {
-			$post_category = array( get_option( 'default_category' ) );
+		if ( 'post' == $postarr['post_type'] && 'auto-draft' != $postarr['post_status'] ) {
+			$postarr['post_category'] = array( get_option( 'default_category' ) );
 		} else {
-			$post_category = array();
+			$postarr['post_category'] = array();
 		}
 	}
 
@@ -3438,31 +3438,31 @@ function wp_insert_post( $postarr, $wp_error = false ) {
 	 *
 	 * For new posts check the primitive capability, for updates check the meta capability.
 	 */
-	$post_type_object = get_post_type_object( $post_type );
+	$post_type_object = get_post_type_object( $postarr['post_type'] );
 
-	if ( ! $update && 'pending' === $post_status && ! current_user_can( $post_type_object->cap->publish_posts ) ) {
-		$post_name = '';
-	} elseif ( $update && 'pending' === $post_status && ! current_user_can( 'publish_post', $post_ID ) ) {
-		$post_name = '';
+	if ( ! $update && 'pending' === $postarr['post_status'] && ! current_user_can( $post_type_object->cap->publish_posts ) ) {
+		$postarr['post_name'] = '';
+	} elseif ( $update && 'pending' === $postarr['post_status'] && ! current_user_can( 'publish_post', $post_ID ) ) {
+		$postarr['post_name'] = '';
 	}
 
 	/*
 	 * Create a valid post name. Drafts and pending posts are allowed to have
 	 * an empty post name.
 	 */
-	if ( empty( $post_name ) ) {
-		if ( ! in_array( $post_status, array( 'draft', 'pending', 'auto-draft' ) ) ) {
-			$post_name = sanitize_title( $post_title );
+	if ( empty( $postarr['post_name'] ) ) {
+		if ( ! in_array( $postarr['post_status'], array( 'draft', 'pending', 'auto-draft' ) ) ) {
+			$postarr['post_name'] = sanitize_title( $postarr['post_title'] );
 		} else {
-			$post_name = '';
+			$postarr['post_name'] = '';
 		}
 	} else {
 		// On updates, we need to check to see if it's using the old, fixed sanitization context.
-		$check_name = sanitize_title( $post_name, '', 'old-save' );
-		if ( $update && strtolower( urlencode( $post_name ) ) == $check_name && get_post_field( 'post_name', $post_ID ) == $check_name ) {
-			$post_name = $check_name;
+		$check_name = sanitize_title( $postarr['post_name'], '', 'old-save' );
+		if ( $update && strtolower( urlencode( $postarr['post_name'] ) ) == $check_name && get_post_field( 'post_name', $post_ID ) == $check_name ) {
+			$postarr['post_name'] = $check_name;
 		} else { // new post, or slug has changed.
-			$post_name = sanitize_title( $post_name );
+			$postarr['post_name'] = sanitize_title( $postarr['post_name'] );
 		}
 	}
 
@@ -3472,19 +3472,18 @@ function wp_insert_post( $postarr, $wp_error = false ) {
 	 */
 	if ( empty( $postarr['post_date'] ) || '0000-00-00 00:00:00' == $postarr['post_date'] ) {
 		if ( empty( $postarr['post_date_gmt'] ) || '0000-00-00 00:00:00' == $postarr['post_date_gmt'] ) {
-			$post_date = current_time( 'mysql' );
+			$postarr['post_date'] = current_time( 'mysql' );
 		} else {
-			$post_date = get_date_from_gmt( $postarr['post_date_gmt'] );
+			$postarr['post_date'] = get_date_from_gmt( $postarr['post_date_gmt'] );
 		}
-	} else {
-		$post_date = $postarr['post_date'];
 	}
 
 	// Validate the date.
-	$mm         = substr( $post_date, 5, 2 );
-	$jj         = substr( $post_date, 8, 2 );
-	$aa         = substr( $post_date, 0, 4 );
-	$valid_date = wp_checkdate( $mm, $jj, $aa, $post_date );
+	$mm         = substr( $postarr['post_date'], 5, 2 );
+	$jj         = substr( $postarr['post_date'], 8, 2 );
+	$aa         = substr( $postarr['post_date'], 0, 4 );
+	$valid_date = wp_checkdate( $mm, $jj, $aa, $postarr['post_date'] );
+
 	if ( ! $valid_date ) {
 		if ( $wp_error ) {
 			return new WP_Error( 'invalid_date', __( 'Invalid date.' ) );
@@ -3494,33 +3493,31 @@ function wp_insert_post( $postarr, $wp_error = false ) {
 	}
 
 	if ( empty( $postarr['post_date_gmt'] ) || '0000-00-00 00:00:00' == $postarr['post_date_gmt'] ) {
-		if ( ! in_array( $post_status, array( 'draft', 'pending', 'auto-draft' ) ) ) {
-			$post_date_gmt = get_gmt_from_date( $post_date );
+		if ( ! in_array( $postarr['post_status'], array( 'draft', 'pending', 'auto-draft' ) ) ) {
+			$postarr['post_date_gmt'] = get_gmt_from_date( $postarr['post_date'] );
 		} else {
-			$post_date_gmt = '0000-00-00 00:00:00';
+			$postarr['post_date_gmt'] = '0000-00-00 00:00:00';
 		}
-	} else {
-		$post_date_gmt = $postarr['post_date_gmt'];
 	}
 
-	if ( $update || '0000-00-00 00:00:00' == $post_date ) {
-		$post_modified     = current_time( 'mysql' );
-		$post_modified_gmt = current_time( 'mysql', 1 );
+	if ( $update || '0000-00-00 00:00:00' == $postarr['post_date'] ) {
+		$postarr['post_modified']     = current_time( 'mysql' );
+		$postarr['post_modified_gmt'] = current_time( 'mysql', 1 );
 	} else {
-		$post_modified     = $post_date;
-		$post_modified_gmt = $post_date_gmt;
+		$postarr['post_modified']     = $postarr['post_date'];
+		$postarr['post_modified_gmt'] = $postarr['post_date_gmt'];
 	}
 
-	if ( 'attachment' !== $post_type ) {
-		if ( 'publish' == $post_status ) {
+	if ( 'attachment' !== $postarr['post_type'] ) {
+		if ( 'publish' == $postarr['post_status'] ) {
 			$now = gmdate( 'Y-m-d H:i:59' );
-			if ( mysql2date( 'U', $post_date_gmt, false ) > mysql2date( 'U', $now, false ) ) {
-				$post_status = 'future';
+			if ( mysql2date( 'U', $postarr['post_date_gmt'], false ) > mysql2date( 'U', $now, false ) ) {
+				$postarr['post_status'] = 'future';
 			}
-		} elseif ( 'future' == $post_status ) {
+		} elseif ( 'future' == $postarr['post_status'] ) {
 			$now = gmdate( 'Y-m-d H:i:59' );
-			if ( mysql2date( 'U', $post_date_gmt, false ) <= mysql2date( 'U', $now, false ) ) {
-				$post_status = 'publish';
+			if ( mysql2date( 'U', $postarr['post_date_gmt'], false ) <= mysql2date( 'U', $now, false ) ) {
+				$postarr['post_status'] = 'publish';
 			}
 		}
 	}
@@ -3528,21 +3525,23 @@ function wp_insert_post( $postarr, $wp_error = false ) {
 	// Comment status.
 	if ( empty( $postarr['comment_status'] ) ) {
 		if ( $update ) {
-			$comment_status = 'closed';
+			$postarr['comment_status'] = 'closed';
 		} else {
-			$comment_status = get_default_comment_status( $post_type );
+			$postarr['comment_status'] = get_default_comment_status( $postarr['post_type'] );
 		}
-	} else {
-		$comment_status = $postarr['comment_status'];
 	}
 
-	// These variables are needed by compact() later.
-	$post_content_filtered = $postarr['post_content_filtered'];
-	$post_author           = isset( $postarr['post_author'] ) ? $postarr['post_author'] : $user_id;
-	$ping_status           = empty( $postarr['ping_status'] ) ? get_default_comment_status( $post_type, 'pingback' ) : $postarr['ping_status'];
-	$to_ping               = isset( $postarr['to_ping'] ) ? sanitize_trackback_urls( $postarr['to_ping'] ) : '';
-	$pinged                = isset( $postarr['pinged'] ) ? $postarr['pinged'] : '';
-	$import_id             = isset( $postarr['import_id'] ) ? $postarr['import_id'] : 0;
+	if ( ! isset( $postarr['post_author'] ) ) {
+		$postarr['post_author'] = $user_id;
+	}
+
+	if ( empty( $postarr['ping_status'] ) ) {
+		$postarr['ping_status'] = get_default_comment_status( $postarr['post_type'], 'pingback' );
+	}
+
+	if ( ! empty( $postarr['to_ping'] ) ) {
+		$postarr['to_ping'] = sanitize_trackback_urls( $postarr['to_ping'] );
+	}
 
 	/*
 	 * The 'wp_insert_post_parent' filter expects all variables to be present.
@@ -3555,14 +3554,14 @@ function wp_insert_post( $postarr, $wp_error = false ) {
 	}
 
 	$post_password = isset( $postarr['post_password'] ) ? $postarr['post_password'] : '';
-	if ( 'private' == $post_status ) {
+	if ( 'private' == $postarr['post_status'] ) {
 		$post_password = '';
 	}
 
 	if ( isset( $postarr['post_parent'] ) ) {
-		$post_parent = (int) $postarr['post_parent'];
+		$postarr['post_parent'] = (int) $postarr['post_parent'];
 	} else {
-		$post_parent = 0;
+		$postarr['post_parent'] = 0;
 	}
 
 	/**
@@ -3575,37 +3574,65 @@ function wp_insert_post( $postarr, $wp_error = false ) {
 	 * @param array $new_postarr Array of parsed post data.
 	 * @param array $postarr     Array of sanitized, but otherwise unmodified post data.
 	 */
-	$post_parent = apply_filters( 'wp_insert_post_parent', $post_parent, $post_ID, compact( array_keys( $postarr ) ), $postarr );
+	$postarr['post_parent'] = apply_filters( 'wp_insert_post_parent', $postarr['post_parent'], $post_ID, $postarr, $original_postarr );
 
 	/*
 	 * If the post is being untrashed and it has a desired slug stored in post meta,
 	 * reassign it.
 	 */
-	if ( 'trash' === $previous_status && 'trash' !== $post_status ) {
+	if ( 'trash' === $previous_status && 'trash' !== $postarr['post_status'] ) {
 		$desired_post_slug = get_post_meta( $post_ID, '_wp_desired_post_slug', true );
 		if ( $desired_post_slug ) {
 			delete_post_meta( $post_ID, '_wp_desired_post_slug' );
-			$post_name = $desired_post_slug;
+			$postarr['post_name'] = $desired_post_slug;
 		}
 	}
 
 	// If a trashed post has the desired slug, change it and let this post have it.
-	if ( 'trash' !== $post_status && $post_name ) {
-		wp_add_trashed_suffix_to_post_name_for_trashed_posts( $post_name, $post_ID );
+	if ( 'trash' !== $postarr['post_status'] && $postarr['post_name'] ) {
+		wp_add_trashed_suffix_to_post_name_for_trashed_posts( $postarr['post_name'], $post_ID );
 	}
 
 	// When trashing an existing post, change its slug to allow non-trashed posts to use it.
-	if ( 'trash' === $post_status && 'trash' !== $previous_status && 'new' !== $previous_status ) {
-		$post_name = wp_add_trashed_suffix_to_post_name_for_post( $post_ID );
+	if ( 'trash' === $postarr['post_status'] && 'trash' !== $previous_status && 'new' !== $previous_status ) {
+		$postarr['post_name'] = wp_add_trashed_suffix_to_post_name_for_post( $post_ID );
 	}
 
-	$post_name = wp_unique_post_slug( $post_name, $post_ID, $post_status, $post_type, $post_parent );
+	$postarr['post_name'] = wp_unique_post_slug( $postarr['post_name'], $post_ID, $postarr['post_status'], $postarr['post_type'], $postarr['post_parent'] );
 
 	// Don't unslash.
 	$post_mime_type = isset( $postarr['post_mime_type'] ) ? $postarr['post_mime_type'] : '';
 
 	// Expected_slashed (everything!).
-	$data = compact( 'post_author', 'post_date', 'post_date_gmt', 'post_content', 'post_content_filtered', 'post_title', 'post_excerpt', 'post_status', 'post_type', 'comment_status', 'ping_status', 'post_password', 'post_name', 'to_ping', 'pinged', 'post_modified', 'post_modified_gmt', 'post_parent', 'menu_order', 'post_mime_type', 'guid' );
+	$data = array_intersect_key(
+		$postarr,
+		array_fill_keys(
+			array(
+				'post_author',
+				'post_date',
+				'post_date_gmt',
+				'post_content',
+				'post_content_filtered',
+				'post_title',
+				'post_excerpt',
+				'post_status',
+				'post_type',
+				'comment_status',
+				'ping_status',
+				'post_password',
+				'post_name',
+				'to_ping',
+				'pinged',
+				'post_modified',
+				'post_modified_gmt',
+				'post_parent',
+				'menu_order',
+				'post_mime_type',
+				'guid',
+			),
+			''
+		)
+	);
 
 	$emoji_fields = array( 'post_title', 'post_content', 'post_excerpt' );
 
@@ -3618,7 +3645,7 @@ function wp_insert_post( $postarr, $wp_error = false ) {
 		}
 	}
 
-	if ( 'attachment' === $post_type ) {
+	if ( 'attachment' === $postarr['post_type'] ) {
 		/**
 		 * Filters attachment post data before it is updated in or added to the database.
 		 *
@@ -3627,7 +3654,7 @@ function wp_insert_post( $postarr, $wp_error = false ) {
 		 * @param array $data    An array of sanitized attachment post data.
 		 * @param array $postarr An array of unsanitized attachment post data.
 		 */
-		$data = apply_filters( 'wp_insert_attachment_data', $data, $postarr );
+		$data = apply_filters( 'wp_insert_attachment_data', $data, $original_postarr );
 	} else {
 		/**
 		 * Filters slashed post data just before it is inserted into the database.
@@ -3637,7 +3664,7 @@ function wp_insert_post( $postarr, $wp_error = false ) {
 		 * @param array $data    An array of slashed post data.
 		 * @param array $postarr An array of sanitized, but otherwise unmodified post data.
 		 */
-		$data = apply_filters( 'wp_insert_post_data', $data, $postarr );
+		$data = apply_filters( 'wp_insert_post_data', $data, $original_postarr );
 	}
 	$data  = wp_unslash( $data );
 	$where = array( 'ID' => $post_ID );
@@ -3681,16 +3708,16 @@ function wp_insert_post( $postarr, $wp_error = false ) {
 	}
 
 	if ( empty( $data['post_name'] ) && ! in_array( $data['post_status'], array( 'draft', 'pending', 'auto-draft' ) ) ) {
-		$data['post_name'] = wp_unique_post_slug( sanitize_title( $data['post_title'], $post_ID ), $post_ID, $data['post_status'], $post_type, $post_parent );
+		$data['post_name'] = wp_unique_post_slug( sanitize_title( $data['post_title'], $post_ID ), $post_ID, $data['post_status'], $postarr['post_type'], $postarr['post_parent'] );
 		$wpdb->update( $wpdb->posts, array( 'post_name' => $data['post_name'] ), $where );
 		clean_post_cache( $post_ID );
 	}
 
-	if ( is_object_in_taxonomy( $post_type, 'category' ) ) {
-		wp_set_post_categories( $post_ID, $post_category );
+	if ( is_object_in_taxonomy( $postarr['post_type'], 'category' ) ) {
+		wp_set_post_categories( $post_ID, $postarr['post_category'] );
 	}
 
-	if ( isset( $postarr['tags_input'] ) && is_object_in_taxonomy( $post_type, 'post_tag' ) ) {
+	if ( isset( $postarr['tags_input'] ) && is_object_in_taxonomy( $postarr['post_type'], 'post_tag' ) ) {
 		wp_set_post_tags( $post_ID, $postarr['tags_input'] );
 	}
 
@@ -3739,8 +3766,8 @@ function wp_insert_post( $postarr, $wp_error = false ) {
 
 	// Set or remove featured image.
 	if ( isset( $postarr['_thumbnail_id'] ) ) {
-		$thumbnail_support = current_theme_supports( 'post-thumbnails', $post_type ) && post_type_supports( $post_type, 'thumbnail' ) || 'revision' === $post_type;
-		if ( ! $thumbnail_support && 'attachment' === $post_type && $post_mime_type ) {
+		$thumbnail_support = current_theme_supports( 'post-thumbnails', $postarr['post_type'] ) && post_type_supports( $postarr['post_type'], 'thumbnail' ) || 'revision' === $postarr['post_type'];
+		if ( ! $thumbnail_support && 'attachment' === $postarr['post_type'] && $post_mime_type ) {
 			if ( wp_attachment_is( 'audio', $post_ID ) ) {
 				$thumbnail_support = post_type_supports( 'attachment:audio', 'thumbnail' ) || current_theme_supports( 'post-thumbnails', 'attachment:audio' );
 			} elseif ( wp_attachment_is( 'video', $post_ID ) ) {