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Home Backend Development PHP Tutorial PHP:file_get_contents字符串结果查询

PHP:file_get_contents字符串结果查询

Jun 06, 2016 pm 08:47 PM
php

1.txt的内容:

这是测试文件

PHP代码如下:

<code><?PHP //无法得出结果
    echo strpos(file_get_contents("1.txt"), "测试");
    //输出正确结果:6
    echo strpos("这是测试文件", "测试");
?>
</code>
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以上代码执行的时候,并没有能成功找到"测试"在1.txt文件中的位置。

回复内容:

1.txt的内容:

这是测试文件

PHP代码如下:

<code><?PHP //无法得出结果
    echo strpos(file_get_contents("1.txt"), "测试");
    //输出正确结果:6
    echo strpos("这是测试文件", "测试");
?>
</code>
Copy after login
Copy after login

以上代码执行的时候,并没有能成功找到"测试"在1.txt文件中的位置。

一看到txt就知道是编码问题了,测试是在PHP文件中,所以是PHP文件的编码(应该是UTF-8),txt文件肯定是用默认的记事本造的,是GBK编码的了。

  1. 分解测试,先把file_get_contents("1.txt")的内容搞到一个变量里,看一下究竟是什么。
  2. getcwd()函数看一下你的PHP文件的工作目录。
    执行php脚本的工作目录,恐怕并不像你想象的那样,总是在php脚本同一个目录下的。
    最简单的,一行Shell命令就打破这个错误认知:/usr/bin/env php /some/other/dir/script.php
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