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初学PHP,include的奇怪有关问题，求指点

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Jun 13, 2016 pm 12:22 PM

commonnbsponcephpsystem

初学PHP,include的奇怪问题，求指点
require_once '../../system/common.php';
页面头部会莫名其妙多了一串乱码字符串。
怎么调都没用，而common.php中并没有找到echo的内容。
后来不经意间把common.php，文件名字改成common1.php
require_once '../../system/common1.php';
竟然不会乱码了，名字改回common.php又会乱码了。这是怎么回事呢，虽然现在临时用common1.php,可以解决了，但是百思不得其解，求前辈帮忙指点下。
------解决思路----------------------
bom 头搜索一下

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