Guide to using is_dir() function in PHP_PHP Tutorial-PHP Tutorial-php.cn

Guide to the use of is_dir() function in PHP

PHP provides the built-in function is_dir to check whether the incoming path parameter is a directory and returns true if it is a directory. That is to say, if the parameter passed in is a file or does not exist, it will be false, so the current parameter cannot be said to be either a folder or a file. Another thing to note is that parameters support relative paths and absolute paths.

Function: is_dir()

Function: Determine whether the given file name is a directory

Description:

bool is_dir ( string $filename )

Returns TRUE if the filename exists and is a directory.

If filename is a relative path, its relative path is checked against the current working directory.

Note: The result of this function will be cached. See clearstatcache() for more information.

Example 1

var_dump(is_dir('a_file.txt')) . "n";

var_dump(is_dir('bogus_dir/abc')) . "n";

var_dump(is_dir('..')); //one dir up

$file = "images";

if(is_dir($file))

{

echo ("$file is a directory");

}

else

{

echo ("$file is not a directory");

}

var_dump(is_dir('a_file.txt')) . "n";

var_dump(is_dir('bogus_dir/abc')) . "n";

var_dump(is_dir('..')); //one dir up

The above example will output:

bool(false)

Related labels：

dir is php

source：php.cn

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