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php 下用file_exists 检查文件或目录是否存在的方法 - 站长搜索
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php 下用file_exists 检查文件或目录是否存在的方法

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2014-12-21 03:15:03 转载来源: 网络整理/侵权必删

本文为大家讲解的是php 下用file_exists 检查文件或目录是否存在的方法,感兴趣的同学参考下。 其实于php教程 file_exists 函数与 file_exists语法我们早就讲过了,下面我们来看看一下关于它的使用方法与实例吧 说明 bool file_exists ( string $filename ) 如果由 filename 指定的文件或目录存在则返回 TRUE,否则返回 FALSE

本文为大家讲解的是php 下用file_exists 检查文件目录是否在的方法,感兴趣的同学参考下。

其实于php教程 file_exists 函数与 file_exists语法我们早就讲过了,下面我们来看看一下关于它的使用方法与实例吧
说明
bool file_exists ( string $filename )

如果由 filename 指定的文件或目录存在则返回 TRUE,否则返回 FALSE。

其实于php教程 file_exists 函数与 file_exists语法我们早就讲过了,下面我们来看看一下关于它的使用方法与实例吧

路径的文件或目录。

在Windows上,使用/ /计算机名/共享/文件名或 计算机名共享文件名,以检查网络共享文件。
在 Windows 中要用 //computername/share/filename 或者 computernamesharefilename 来检查网络中的共享文件。

这是一个很简单的实例一
 

<?php
$filename = '/phperz.com/aa/to/foo.txt';
if (file_exists($filename)) {
echo "文件$filename exists";
} else {
echo "文件$filename 不存在";
}
?>


输出结果为:

文件/phperz.com/aa/to/foo.txt己存在

再来看看实例二


<?php
echo file_exists("jb51.net.txt");
?>


这个我们就直接用file_exists来返回ture or false

 


标签: php 下用 file exists 检查 文件 目录 是否 在的


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