pathinfo

(PHP 4 >= 4.0.3, PHP 5, PHP 7, PHP 8)

pathinfo — Returns information about a file path

Descrição

pathinfo(string $path, int $flags = PATHINFO_ALL): array|string

pathinfo() returns information about path: either an associative array or a string, depending on flags.

Nota:
For information on retrieving the current path info, read the section on predefined reserved variables.

Nota:
pathinfo() operates naively on the input string, and is not aware of the actual filesystem, or path components such as "..".

Nota:
On Windows systems only, the \ character will be interpreted as a directory separator. On other systems it will be treated like any other character.

Cuidado

pathinfo() is locale aware, so for it to parse a path containing multibyte characters correctly, the matching locale must be set using the setlocale() function.

Parâmetros

path

The path to be parsed.

flags

If present, specifies a specific element to be returned; one of PATHINFO_DIRNAME, PATHINFO_BASENAME, PATHINFO_EXTENSION or PATHINFO_FILENAME.

If flags is not specified, returns all available elements.

Valor Retornado

If the flags parameter is not passed, an associative array containing the following elements is returned: dirname, basename, extension (if any), and filename.

Nota:
If the path has more than one extension, PATHINFO_EXTENSION returns only the last one and PATHINFO_FILENAME only strips the last one. (see first example below).

Nota:
If the path does not have an extension, no extension element will be returned (see second example below).

Nota:
If the basename of the path starts with a dot, the following characters are interpreted as extension, and the filename is empty (see third example below).

If flags is present, returns a string containing the requested element.

Exemplos

Exemplo #1 pathinfo() Example

<?php
$path_parts = pathinfo('/www/htdocs/inc/lib.inc.php');

echo $path_parts['dirname'], "\n";
echo $path_parts['basename'], "\n";
echo $path_parts['extension'], "\n";
echo $path_parts['filename'], "\n";
?>

O exemplo acima produzirá:

/www/htdocs/inc
lib.inc.php
php
lib.inc

Exemplo #2 pathinfo() example showing difference between null and no extension

<?php
$path_parts = pathinfo('/path/emptyextension.');
var_dump($path_parts['extension']);

$path_parts = pathinfo('/path/noextension');
var_dump($path_parts['extension']);
?>

O exemplo acima produzirá algo semelhante a:

string(0) ""

Notice: Undefined index: extension in test.php on line 6
NULL

Exemplo #3 pathinfo() example for a dot-file

<?php
print_r(pathinfo('/some/path/.test'));
?>

O exemplo acima produzirá algo semelhante a:

Array
(
    [dirname] => /some/path
    [basename] => .test
    [extension] => test
    [filename] =>
)

Exemplo #4 pathinfo() example with array dereferencing

The flags parameter is not a bitmask. Only a single value may be provided. To select only a limited set of parsed values, use array destructuring like so:

<?php
['basename' => $basename, 'dirname' => $dirname] = pathinfo('/www/htdocs/inc/lib.inc.php');

var_dump($basename, $dirname);
?>

O exemplo acima produzirá algo semelhante a:

string(11) "lib.inc.php"
string(15) "/www/htdocs/inc"

Veja Também

dirname() - Retorna o caminho/path do diretório pai
basename() - Retorna a última parte do caminho
parse_url() - Parse a URL and return its components
realpath() - Returns canonicalized absolute pathname

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User Contributed Notes 4 notes

down

Lori ¶

5 years ago

Simple example of pathinfo and array destructuring in PHP 7:
<?php
[ 'basename' => $basename, 'dirname' => $dirname ] = pathinfo('/www/htdocs/inc/lib.inc.php');

var_dump($basename, $dirname);

// result:
// string(11) "lib.inc.php"
// string(15) "/www/htdocs/inc"
?>

down

Pietro Baricco ¶

11 years ago

Use this function in place of pathinfo to make it work with UTF-8 encoded file names too

<?php
function mb_pathinfo($filepath) {
    preg_match('%^(.*?)[\\\\/]*(([^/\\\\]*?)(\.([^\.\\\\/]+?)|))[\\\\/\.]*$%im',$filepath,$m);
    if($m[1]) $ret['dirname']=$m[1];
    if($m[2]) $ret['basename']=$m[2];
    if($m[5]) $ret['extension']=$m[5];
    if($m[3]) $ret['filename']=$m[3];
    return $ret;
}
?>

down

n0dalus ¶

18 years ago

If a file has more than one 'file extension' (seperated by periods), the last one will be returned.
For example:
<?php
$pathinfo = pathinfo('/dir/test.tar.gz');
echo 'Extension: '.$pathinfo['extension'];
?>
will produce:
Extension: gz

and not tar.gz

down

urvi ¶

1 year ago

about the path, there are one thing you should note :
On Windows, both slash (/) and backslash (\) are used as directory separator character. In other environments, it is the forward slash (/).  (this explain is from basename() function part https://www.php.net/manual/en/function.basename.php)
example:
<?php
$path = "https://urvidutta.com /a\b\c\filename.pdf";

echo pathinfo($pdfUrl, PATHINFO_BASENAME);  //get basename
//output
//on window:  result is filename.pdf
//on Linux: result is a\b\c\filename.pdf (that is may not your expect)

//so in order to get same result in different system.  i will do below first.
$path = str_replace($path, '\\', '/'); //convert '\'  to '/'
?>

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