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output_buffering,该如何解决

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Jun 13, 2016 am 11:11 AM

buffercleannbspoutput

output_buffering
看缓冲区有好多疑问哟
各位前辈指教
我打开php.ini  看到

; output_buffering
;   Default Value: Off
;   Development Value: 4096
;   Production Value: 4096

output_buffering这个是注释掉的
按我的理解就是没有启动php的缓冲区

但是我在程序中写

echo "123123";
ob_end_clean();

就没有输出到页面上
那就是说应该是 echo是先写入缓冲区的
然后被ob_end_clean干掉了

我的问题就是  如果是注释掉的
缓冲区是开着的  还是关着的？？？    跟环境有关系吗

------解决方案--------------------
output_buffering = 4096

你确定你那里是注释的？？？
这个选项在php.ini中默认是打开的，除非你手动修改过它。
我将这个注释掉之后。

echo 123;
ob_end_clean();

会立刻输出123，并且提示Notice: ob_end_clean(): failed to delete buffer. No buffer to delete in /Users/angryfrog/website/test.php on line 3。

没有buffer可被删除，也就是说根本没有开启缓冲。
除非在头部加上ob_start();才不会输出123.

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