[WordPress] user_meta transient

user_meta_transient.php

<?php
/**
 * Delete a user meta transient.
 */
function delete_user_meta_transient( $user_id, $transient ) {
	global $_wp_using_ext_object_cache;

	$user_id = (int) $user_id;

	do_action( 'delete_user_meta_transient_' . $transient, $user_id, $transient );

	if ( $_wp_using_ext_object_cache ) {
		$result = wp_cache_delete( "{$transient}-{$user_id}", "user_meta_transient-{$user_id}" );
	} else {
		$meta_timeout = '_transient_timeout_' . $transient;
		$meta = '_transient_' . $transient;
		$result = delete_user_meta( $user_id, $meta );
		if ( $result )
			delete_user_meta( $user_id, $meta_timeout );
	}

	if ( $result )
		do_action( 'deleted_user_meta_transient', $transient, $user_id, $transient );
	return $result;
}

/**
 * Get the value of a user meta transient.
 */
function get_user_meta_transient( $user_id, $transient ) {
	global $_wp_using_ext_object_cache;

	$user_id = (int) $user_id;

	if (has_filter('pre_user_meta_transient_' . $transient)) {
		$pre = apply_filters( 'pre_user_meta_transient_' . $transient, $user_id, $transient );
		if ( false !== $pre )
			return $pre;
	}

	if ( $_wp_using_ext_object_cache ) {
		$value = wp_cache_get( "{$transient}-{$user_id}", "user_meta_transient-{$user_id}" );
	} else {
		$meta_timeout = '_transient_timeout_' . $transient;
		$meta = '_transient_' . $transient;
		$value = get_user_meta( $user_id, $meta, true );
		if ( $value && ! defined( 'WP_INSTALLING' ) ) {
			if ( get_user_meta( $user_id, $meta_timeout, true ) < time() ) {
				delete_user_meta_transient( $user_id, $transient );
				return false;
			}
		}
	}

	return 
		has_filter('user_meta_transient_' . $transient)
		? apply_filters('user_meta_transient_' . $transient, $value, $user_id)
		: $value;
}

/**
 * Set/update the value of a user meta transient.
 */
function set_user_meta_transient( $user_id, $transient, $value, $expiration = 0 ) {
	global $_wp_using_ext_object_cache;

	$user_id = (int) $user_id;

	delete_user_meta_transient( $user_id, $transient );
	if (has_filter('pre_set_user_meta_transient_' . $transient)) {
		$value = apply_filters( 'pre_set_user_meta_transient_' . $transient, $value, $user_id, $transient );
	}

	if ( $_wp_using_ext_object_cache ) {
		$result = wp_cache_set( "{$transient}-{$user_id}", $value, "user_meta_transient-{$user_id}", $expiration );
	} else {
		$meta_timeout = '_transient_timeout_' . $transient;
		$meta = '_transient_' . $transient;
		if ( $expiration ) {
			update_user_meta( $user_id, $meta_timeout, time() + $expiration );
		}
		$result = update_user_meta( $user_id, $meta, $value );
	}
	if ( $result ) {
		do_action( 'set_user_meta_transient_' . $transient, $user_id, $transient );
		do_action( 'setted_user_meta_transient', $transient, $user_id, $transient );
	}
	return $result;
}