Posts: Introduce get_post_types_by_support().

Similar to `get_post_types()`, this new function returns a list of post type names that support a specific feature.

Props wpsmith, barryceelen, swissspidy.
Fixes #34010.
Built from https://develop.svn.wordpress.org/trunk@36652


git-svn-id: http://core.svn.wordpress.org/trunk@36619 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/post.php

@@ -1638,6 +1638,28 @@ function post_type_supports( $post_type, $feature ) {
 	return ( isset( $_wp_post_type_features[$post_type][$feature] ) );
 }
 
+/**
+ * Get a list of post type names that support a specific feature.
+ *
+ * @since 4.5.0
+ *
+ * @global array $_wp_post_type_features
+ *
+ * @param array|string $args     Single feature or an array of features the post types should support.
+ * @param string       $operator Optional. The logical operation to perform. 'or' means
+ *                               only one element from the array needs to match; 'and'
+ *                               means all elements must match; 'not' means no elements may
+ *                               match. Default 'and'.
+ * @return array A list of post type names.
+ */
+function get_post_types_by_support( $args, $operator = 'and' ) {
+	global $_wp_post_type_features;
+
+	$features = array_fill_keys( (array) $args, true );
+
+	return array_keys( wp_filter_object_list( $_wp_post_type_features, $features, $operator ) );
+}
+
 /**
  * Update the post type for the post ID.
  *

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.5-alpha-36651';
+$wp_version = '4.5-alpha-36652';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.