Detailed explanation of the use of file_exists function in php, phpfileexists_PHP tutorial

Detailed explanation of the use of file_exists function in php, phpfileexists

Explanation:
bool file_exists ( string $filename )

Returns TRUE if the file or directory specified by filename exists, otherwise returns FALSE.

On Windows, use //computername/share/filename or computernamesharefilename to check for network shared files.

In Windows, use //computername/share/filename or \computernamesharefilename to check shared files on the network.

Example 1

<&#63;php
$filename = '/jb51.net/aa/to/foo.txt';
if (file_exists($filename)) {
echo "文件$filename exists";
} else {
echo "文件$filename 不存在";
}
&#63;>

The output result is:
The file /jb51.net/aa/to/foo.txt already exists

Example 2

<&#63;php
echo file_exists("jb51.net.txt");
&#63;>

Use file_exists directly to return true or false.

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