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关于ob_get_clean的疑义！

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Release： 2016-06-13 11:57:55
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关于ob_get_clean的疑问！！

<?php<br />echo "hello word";<br />$out=ob_get_clean();<br />echo $out." everyone";<br />?>
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这段程序执行结果是 hello word everyone
奇怪的是为什么可以不用声明 ob_start()
------解决方案--------------------
缓冲区默认是打开的
你可用 ob_get_level() 观察到

Related labels：
clean everyone get nbsp
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