AbstractAdapter.php

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<?php

namespace League\Flysystem\Adapter;

use League\Flysystem\AdapterInterface;

abstract class AbstractAdapter implements AdapterInterface
{
    protected $pathPrefix;

    protected $pathSeparator = '/';

    public function setPathPrefix($prefix)
    {
        $prefix = (string) $prefix;

        if ($prefix === '') {
            $this->pathPrefix = null;
            return;
        }

        $this->pathPrefix = rtrim($prefix, '\\/') . $this->pathSeparator;
    }

    public function getPathPrefix()
    {
        return $this->pathPrefix;
    }

    public function applyPathPrefix($path)
    {
        return $this->getPathPrefix() . ltrim($path, '\\/');
    }

    public function removePathPrefix($path)
    {
        return substr($path, strlen($this->getPathPrefix()));
    }
}