php-relativePath

Calculate a relative path to path

Get the Relative path.

This package make you get a relative path to a target.

Equivalent to GNU realpath (Directory to Dir)

This package intended to same to GNU coreuitls realpath --relative-to=DIR.

realpath option --relative-to=DIR is supposed to be Relative DIR to DIR.

This package is same to GNU realpath, to calc DIR to DIR , not FILE to FILE.

Installing from github.

composer config repositories.takuya/php-relative-path vcs https://github.com/takuya/php-relative-path
composer config minimum-stability dev
composer require takuya/php-relative-path

Installing from packagist.

composer require takuya/php-relative-path
composer install

Usage example.

This package provides a function relative_path() to your composer project.

<?php

require_once 'vendor/autoload.php';
$ret = relative_path('/etc/nginx/sites-available', '/etc/nginx/sites-enabled');
var_dump($ret);#=>'../sites-available'

example:02 file path

<?php

require_once 'vendor/autoload.php';
$from = '/etc/nginx/sites-available/example.com';
$to   = '/etc/nginx/sites-enabled/example.com';
$ret = relative_path( dirname($from),  dirname($to));
var_dump($ret.DIRECTORY_SEPARATOR.basename($from));#=>'../sites-available/example.com'

Notice : relative_path expects DIR.

symlink( relative )

symlink_relative function is available.

<?php
require_once 'vendor/autoload.php';
$real = '/etc/nginx/sites-available/example.com';
$link  = '/etc/nginx/sites-enabled/example.com';
symlink_relative($link,$real);

Relative path is mainly used in symbolic link. so shortcut helper function is provided.

run tests

composer install
composer dumpautoload
rm tests/sample-data.json
./vendor/bin/phpunit

tests results sample.

Test No.01 :        ./tests/Units relative-to ./tests              is Units
Test No.02 :          tests/Units relative-to ./tests              is Units
Test No.03 :        ./tests/Units relative-to tests                is Units
Test No.04 :          tests/Units relative-to tests                is Units
Test No.05 :              ./tests relative-to ./tests/Units        is ..
Test No.06 :                tests relative-to ./tests/Units        is ..
Test No.07 :              ./tests relative-to tests/Units          is ..
Test No.08 :                tests relative-to tests/Units          is ..
Test No.09 :        /usr/bin/bash relative-to /usr/local/bin       is ../../bin/bash
Test No.10 :        /usr/bin/bash relative-to /usr/local/bin/      is ../../bin/bash
Test No.11 :             /usr/bin relative-to /usr/local/bin/      is ../../bin
Test No.12 :                /usr/ relative-to /usr/local/bin/      is ../..
Test No.13 :                 /usr relative-to /usr/local/bin/      is ../..
Test No.14 :                    / relative-to /usr/local/bin       is ../../..
Test No.15 :         /usr/bin/php relative-to /usr/local/bin/      is ../../bin/php
Test No.16 :        /usr/bin/bash relative-to /usr/local/bin/      is ../../bin/bash

You will have doubts about ../../bin/bash and /../../php .

You may shout loud complaint This package is no use. But that is bad, Result is correct, intended to be DIR.

/usr/bin/bash relative-to /usr/local/bin/ is ../../bin/bash is correct. DIR to DIR relative path.

In precisely /usr/bin/bash is interpreted as DIR(/usr/bin/bash/), and relative path is ../../bin/bash/.

if you want to create relative symlink use helper function symlink_relative.