#li3 > Lithium Documentation > lithium/console/command/Library::

Extends

Helper method for `console\command\Library::extract()` to gather replacements to perform on the newly extracted files

It looks for a json file specified by `$this->replacementsFile` which defaults to _replacements.json. Running eval on a php file to get the `$replacements` would be more flexible than using json, but definitely much more of a security hole if the library is not trusted.

Parameters

string $base File path to the extracted library

Returns

array A multi-dimensional array. Keys on the top level are filenames or glob-style paths. Those hold an array with keys being the search param and values being the replacement values

Source

						protected function _findReplacements($base = null) {
		$replacements = null;
		if (file_exists($base . '/' . $this->replacementsFile)) {
			$replacementsFilename = $base . '/' . $this->replacementsFile;
			$replacements = json_decode(file_get_contents($replacementsFilename), true);
			if ($replacements !== false) {
				unlink($base . '/' . $this->replacementsFile);
			}
		}
		return $replacements;
	}