php缓存使用

<?phpob_start();phpinfo();$phpinfo = ob_get_contents();//文件读写操作ob_clean();$f   =   fopen( "test.htm", "w ");fwrite($f,$phpinfo);fclose($f); 

ob_end_flush — Flush (send) the output buffer and turn off output buffering

ob_clean — Clean (erase) the output buffer

注意这两个的区别，可以测试