开启OB缓存无效？？？求解。
是这样的，php.ini的ob是关闭的，我直接运行下面的代码提示错误：
<?php
echo "ok";
header("content-type:text/html;charset=utf-8");
echo "ook";
?>
ok
Warning:
Cannot modify header information - headers already sent by (output started at C:\php\apache\htdocs\static\test.php:1) in C:\php\apache\htdocs\static\test.php on line 4
ook
<?php
ob_start();
echo "ok";
header("content-type:text/html;charset=utf-8");
echo "ook";
?>
ok
Warning: Cannot modify header information - headers already sent by (output started at C:\php\apache\htdocs\static\test.php:1) in C:\php\apache\htdocs\static\test.php on line 4
ook
