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wp-content/plugins/wordpress-seo/inc/wpseo-non-ajax-functions.php

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+<?php
+/**
+ * WPSEO plugin file.
+ *
+ * @package WPSEO\Internals
+ */
+
+if ( ! defined( 'WPSEO_VERSION' ) ) {
+	header( 'Status: 403 Forbidden' );
+	header( 'HTTP/1.1 403 Forbidden' );
+	exit();
+}
+
+/**
+ * Initializes the admin bar.
+ *
+ * @return void
+ */
+function wpseo_initialize_admin_bar() {
+	$admin_bar_menu = new WPSEO_Admin_Bar_Menu();
+	$admin_bar_menu->register_hooks();
+}
+add_action( 'wp_loaded', 'wpseo_initialize_admin_bar' );
+
+/**
+ * Allows editing of the meta fields through weblog editors like Marsedit.
+ *
+ * @param array $required_capabilities Capabilities that must all be true to allow action.
+ * @param array $capabilities          Array of capabilities to be checked, unused here.
+ * @param array $args                  List of arguments for the specific capabilities to be checked.
+ *
+ * @return array Filtered capabilities.
+ */
+function allow_custom_field_edits( $required_capabilities, $capabilities, $args ) {
+	if ( ! in_array( $args[0], [ 'edit_post_meta', 'add_post_meta' ], true ) ) {
+		return $required_capabilities;
+	}
+
+	// If this is provided, it is the post ID.
+	if ( empty( $args[2] ) ) {
+		return $required_capabilities;
+	}
+
+	// If this is provided, it is the custom field.
+	if ( empty( $args[3] ) ) {
+		return $required_capabilities;
+	}
+
+	// If the meta key is part of the plugin, grant capabilities accordingly.
+	if ( strpos( $args[3], WPSEO_Meta::$meta_prefix ) === 0 && current_user_can( 'edit_post', $args[2] ) ) {
+		$required_capabilities[ $args[0] ] = true;
+	}
+
+	return $required_capabilities;
+}
+
+add_filter( 'user_has_cap', 'allow_custom_field_edits', 0, 3 );