PHP不缓存数据头
function nocache_headers() {
// why are these @-silenced when other header calls aren't?
@header( 'Expires: Wed, 11 Jan 1984 05:00:00 GMT' );
@header( 'Last-Modified: ' . gmdate( 'D, d M Y H:i:s' ) . ' GMT' );
@header( 'Cache-Control: no-cache, must-revalidate, max-age=0' );
@header( 'Pragma: no-cache' );
}
