PHP is_dir () Function usage Guide _php tutorial

Guidelines for using the Is_dir () function in PHP

PHP provides built-in function is_dir to check if the passed-in Path parameter is a directory and returns true if it is a directory. This means that the parameter passed in is either a file or not, so the current parameter cannot be said to be a folder or a file. It is also important to note that the parameters support relative paths and absolute paths.

Function: Is_dir ()

Function: Determine if a given file name is a directory

Description

BOOL Is_dir (String $filename)

Returns TRUE if the file name exists and is a directory.

If filename is a relative path, the relative path is checked according to the current working directory.

Note: The result of this function is cached. See Clearstatcache () for more information.

Example 1

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Var_dump (Is_dir (' A_file.txt ')). "\ n"; Var_dump (Is_dir (' bogus_dir/abc ')). "\ n"; Var_dump (Is_dir (' ... ')); One dir up ?>

The example above will output:

BOOL (FALSE)

BOOL (FALSE)

BOOL (TRUE)

Example 2

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$file = "Images"; if (Is_dir ($file)) { Echo ("$file is a directory"); } Else { Echo ("$file is not a directory"); } ?>

Output:

If the directory exists images, the output is:

Images is a directory

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