How does PHP determine whether it is a folder or a file?

#How does PHP determine whether it is a folder or a file?

1. Use the "is_file()" function to determine whether it is a file. If it is a file, the return result is true, otherwise it is false;

Usage example

<?php
var_dump(is_file(&#39;a_file.txt&#39;)) . "\n";
var_dump(is_file(&#39;/usr/bin/&#39;)) . "\n";
?>

Result

bool(true)
bool(false)

2. Use the "is_dir()" function to determine whether it is a directory, and the return result is true or false.

Usage example

<?php
var_dump(is_dir(&#39;a_file.txt&#39;));
var_dump(is_dir(&#39;bogus_dir/abc&#39;));

var_dump(is_dir(&#39;..&#39;)); //one dir up
?>

Result

bool(false)
bool(false)
bool(true)

Recommended tutorial: "PHP"

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