set_site_transient()

设置/更新站点瞬态的值。

原型

set_site_transient( string $transient, mixed $value, int $expiration )

描述

你不需要序列化值，如果值需要序列化，那么它将在设置之前被序列化。

参考：

• set_transient()

参数

$transient (string) (Required) 瞬态名称。预计不会被SQL转义。长度不得超过167个字符。

$value (mixed) (Required) 瞬态值。预计不会被SQL转义。

$expiration (int) (Optional)  到期的时间，以秒为单位。默认为0（无到期）。

返回值

(bool)  如果未设置值，则返回false，如果设置了值，则返回true。

源文件

路径：wp-includes/option.php

<?php
...
function set_site_transient( $transient, $value, $expiration = 0 ) {
	/**
	 * Filters the value of a specific site transient before it is set.
	 *
	 * The dynamic portion of the hook name, `$transient`, refers to the transient name.
	 *
	 * @since 3.0.0
	 * @since 4.4.0 The `$transient` parameter was added.
	 *
	 * @param mixed  $value     New value of site transient.
	 * @param string $transient Transient name.
	 */
	$value = apply_filters( "pre_set_site_transient_{$transient}", $value, $transient );
	$expiration = (int) $expiration;
	/**
	 * Filters the expiration for a site transient before its value is set.
	 *
	 * The dynamic portion of the hook name, `$transient`, refers to the transient name.
	 *
	 * @since 4.4.0
	 *
	 * @param int    $expiration Time until expiration in seconds. Use 0 for no expiration.
	 * @param mixed  $value      New value of site transient.
	 * @param string $transient  Transient name.
	 */
	$expiration = apply_filters( "expiration_of_site_transient_{$transient}", $expiration, $value, $transient );
	if ( wp_using_ext_object_cache() ) {
		$result = wp_cache_set( $transient, $value, 'site-transient', $expiration );
	} else {
		$transient_timeout = '_site_transient_timeout_' . $transient;
		$option = '_site_transient_' . $transient;
		if ( false === get_site_option( $option ) ) {
			if ( $expiration )
				add_site_option( $transient_timeout, time() + $expiration );
			$result = add_site_option( $option, $value );
		} else {
			if ( $expiration )
				update_site_option( $transient_timeout, time() + $expiration );
			$result = update_site_option( $option, $value );
		}
	}
	if ( $result ) {
		/**
		 * Fires after the value for a specific site transient has been set.
		 *
		 * The dynamic portion of the hook name, `$transient`, refers to the transient name.
		 *
		 * @since 3.0.0
		 * @since 4.4.0 The `$transient` parameter was added
		 *
		 * @param mixed  $value      Site transient value.
		 * @param int    $expiration Time until expiration in seconds.
		 * @param string $transient  Transient name.
		 */
		do_action( "set_site_transient_{$transient}", $value, $expiration, $transient );
		/**
		 * Fires after the value for a site transient has been set.
		 *
		 * @since 3.0.0
		 *
		 * @param string $transient  The name of the site transient.
		 * @param mixed  $value      Site transient value.
		 * @param int    $expiration Time until expiration in seconds.
		 */
		do_action( 'setted_site_transient', $transient, $value, $expiration );
	}
	return $result;
}
...
?>

其他

英文文档：https://developer.wordpress.org/reference/functions/set_site_transient/