lib/PHPExif/Adapter/Exiftool.php
public function getToolPath()
    {
        if (empty($this->toolPath)) {
            $path = exec('which ' . self::TOOL_NAME);
            $this->setToolPath($path);
        }

        return $this->toolPath;
    }
public function getToolPath()
    {
        if (empty($this->toolPath)) {
            $path = exec('which ' . self::TOOL_NAME);
            $this->setToolPath($path);
        }

        return $this->toolPath;
    }
Getter for the exiftool binary path
Lazy loads the "default" path

@return string