note 97885 added to function.realpath
| From: | jpic at osu1 dot php dot net | Date: | Thu, 13 May 2010 19:04:31 +0000 |
| Subject: | note 97885 added to function.realpath | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-169223@lists.php.net to get a copy of this message | ||
There is no native function that does the opposite.
Pure-php implementation:
<?php
function getRelativePath( $path, $compareTo ) {
// clean arguments by removing trailing and prefixing slashes
if ( substr( $path, -1 ) == '/' ) {
$path = substr( $path, 0, -1 );
}
if ( substr( $path, 0, 1 ) == '/' ) {
$path = substr( $path, 1 );
}
if ( substr( $compareTo, -1 ) == '/' ) {
$compareTo = substr( $compareTo, 0, -1 );
}
if ( substr( $compareTo, 0, 1 ) == '/' ) {
$compareTo = substr( $compareTo, 1 );
}
// simple case: $compareTo is in $path
if ( strpos( $path, $compareTo ) === 0 ) {
$offset = strlen( $compareTo ) + 1;
return substr( $path, $offset );
}
$relative = array( );
$pathParts = explode( '/', $path );
$compareToParts = explode( '/', $compareTo );
foreach( $compareToParts as $index => $part ) {
if ( isset( $pathParts[$index] ) && $pathParts[$index] == $part ) {
continue;
}
$relative[] = '..';
}
foreach( $pathParts as $index => $part ) {
if ( isset( $compareToParts[$index] ) && $compareToParts[$index] == $part ) {
continue;
}
$relative[] = $part;
}
return implode( '/', $relative );
}
?>
Some tests forr phpunit:
<?php
static public function getRelativePathProvider( ) {
return array(
array(
'/srv/foo/bar',
'/srv',
'foo/bar',
),
array(
'/srv/foo/bar',
'/srv/',
'foo/bar',
),
array(
'/srv/foo/bar/',
'/srv',
'foo/bar',
),
array(
'/srv/foo/bar/',
'/srv/',
'foo/bar',
),
array(
'/srv/foo/bar',
'/srv/test',
'../foo/bar',
),
array(
'/srv/foo/bar',
'/srv/test/fool',
'../../foo/bar',
),
array(
'/srv/mad/xp/mad/model/static/css/uni-form.css',
'/srv/mad/xp/liria/',
'../mad/model/static/css/uni-form.css',
),
);
}
/**
* @dataProvider getRelativePathProvider
*/
public function testGetRelativePath( $path, $compareTo, $expected ) {
$result = getRelativePath( $path, $compareTo );
$this->assertEquals( $expected, $result );
}
?>
----
Server IP: 130.206.1.5
Probable Submitter: 87.223.74.210
----
Manual Page -- http://www.php.net/manual/en/function.realpath.php
Edit -- https://master.php.net/note/edit/97885
Del: integrated -- https://master.php.net/note/delete/97885/integrated
Del: useless -- https://master.php.net/note/delete/97885/useless
Del: bad code -- https://master.php.net/note/delete/97885/bad+code
Del: spam -- https://master.php.net/note/delete/97885/spam
Del: non-english -- https://master.php.net/note/delete/97885/non-english
Del: in docs -- https://master.php.net/note/delete/97885/in+docs
Del: other reasons-- https://master.php.net/note/delete/97885
Reject -- https://master.php.net/note/reject/97885
Search -- https://master.php.net/manage/user-notes.php