VersionPress\Storages\Serialization\IniSerializer::sanitizeSectionsAndKeys_addPlaceholders PHP Method

    private static function sanitizeSectionsAndKeys_addPlaceholders($string)
    {
        $sanitizedChars = self::$sanitizedChars;
        // Replace brackets in section names
        // https://regex101.com/r/bT2nO7/2
        $string = preg_replace_callback("/^\\[(.*)\\]/m", function ($match) use($sanitizedChars) {
            $sectionWithPlaceholders = strtr($match[1], $sanitizedChars);
            return "[{$sectionWithPlaceholders}]";
        }, $string);
        // Replace brackets and quotes in keys
        // https://regex101.com/r/iD5oO0/3
        $string = preg_replace_callback("/^(.*?) = /m", function ($match) use($sanitizedChars) {
            $keyWithPlaceholders = strtr($match[1], $sanitizedChars);
            return $keyWithPlaceholders . (isset($match[2]) ? $match[2] : "") . " = ";
        }, $string);
        return $string;
    }