Add upstream

wp-content/plugins/jetpack/modules/protect/transient-cleanup.php

@@ -0,0 +1,58 @@
+<?php
+/*
+Adapted from Purge Transients by Seebz
+https://github.com/Seebz/Snippets/tree/master/Wordpress/plugins/purge-transients
+*/
+if ( ! function_exists( 'jp_purge_transients' ) ) {
+
+	/**
+	 * Jetpack Purge Transients.
+	 *
+	 * @access public
+	 * @param string $older_than (default: '1 hour') Older Than.
+	 * @return void
+	 */
+	function jp_purge_transients( $older_than = '1 hour' ) {
+		global $wpdb;
+		$older_than_time = strtotime( '-' . $older_than );
+		if ( $older_than_time > time() || $older_than_time < 1 ) {
+			return false;
+		}
+		$sql = $wpdb->prepare( "
+		SELECT REPLACE(option_name, '_transient_timeout_jpp_', '') AS transient_name
+		FROM {$wpdb->options}
+		WHERE option_name LIKE '\_transient\_timeout\_jpp\__%%'
+		AND option_value < %d
+		", $older_than_time );
+		$transients = $wpdb->get_col( $sql );
+		$options_names = array();
+		foreach ( $transients as $transient ) {
+			$options_names[] = '_transient_jpp_' . $transient;
+			$options_names[] = '_transient_timeout_jpp_' . $transient;
+		}
+		if ( $options_names ) {
+			$option_names_string = implode( ', ', array_fill( 0, count( $options_names ), '%s' ) );
+			$delete_sql = "DELETE FROM {$wpdb->options} WHERE option_name IN ($option_names_string)";
+			$delete_sql = call_user_func_array( array( $wpdb, 'prepare' ), array_merge( array( $delete_sql ), $options_names ) );
+			$result = $wpdb->query( $delete_sql );
+			if ( ! $result ) {
+				return false;
+			}
+		}
+		return;
+	}
+}
+
+/**
+ * Jetpack Purge Transients Activation.
+ *
+ * @access public
+ * @return void
+ */
+function jp_purge_transients_activation() {
+	if ( ! wp_next_scheduled( 'jp_purge_transients_cron' ) ) {
+		wp_schedule_event( time(), 'daily', 'jp_purge_transients_cron' );
+	}
+}
+add_action( 'admin_init', 'jp_purge_transients_activation' );
+add_action( 'jp_purge_transients_cron', 'jp_purge_transients' );