Detailed explanation of the use of file_exists() function in php

file_exists — Check whether the file or directory exists

Description:
bool file_exists ( string $filename )

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

Example

Example one

<?php
$filename = &#39;/www/aa/to/foo.txt&#39;;
if (file_exists($filename)) {
echo "文件$filename exists";
} else {
echo "文件$filename 不存在";
}
?>

The output result is:
File/www/aa/to/foo.txt already exists

Example two

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

Use file_exists directly to return true or false.

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