
了解数据库技术:SQLite与MySQL的比较
set_site_transient ( $transient, $value, $expiration = 0 )
set_site_transient: 这是一个WordPress的函数,用来设置一个临时的网站选项。它通常用于存储需要在多个页面或会话中访问的临时数据: 这个函数需要两个参数:暂存器的名称和要存储的数据。
设置/更新站点瞬态的值。
您不需要序列化值。如果需要序列化该值,则将在设置该值之前对其进行序列化。
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() || wp_installing() ) { $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; }