preg_replace-bug.php

<?php

$content ='
"${folder}\\\\";
if (!isset($data[\'file\'])) { die("This doesn\'t appear to be a language constant file".nl); }
$translation = trim($value,"\' \\t\\n\\r\\0\\x0B");  
			\'es_ni\'=>\'Spanish (Nicaragua)\',
			\'es_pa\'=>\'Spanish (Panama)\',
			\'es_pe\'=>\'Spanish (Peru)\',
			\'es_pr\'=>\'Spanish (Puerto Rico)\',
			\'es_py\'=>\'Spanish (Paraguay)\',
			\'es_sv\'=>\'Spanish (El Salvador)\',
			\'es_us\'=>\'Spanish (United States)\',
			\'es_uy\'=>\'Spanish (Uruguay)\',
			\'es_ve\'=>\'Spanish (Venezuela)\',
			\'et_ee\'=>\'Estonian (Estonia)\',
			\'eu_es\'=>\'Basque (Spain)\',
			\'fa_ir\'=>\'Farsi (Iran)\',
			\'fi_fi\'=>\'Finnish (Finland)\',
			\'fo_fo\'=>\'Faroese (Faroe Islands)\',
			\'fr_be\'=>\'French (Belgium)\',
			\'fr_ca\'=>\'French (Canada)\',
			\'fr_ch\'=>\'French (Switzerland)\',
			\'fr_fr\'=>\'French (France)\',
			\'fr_lu\'=>\'French (Luxembourg)\',
			\'fr_mc\'=>\'French (Principality of Monaco)\',
			\'gl_es\'=>\'Galician (Spain)\',
			\'gu_in\'=>\'Gujarati (India)\',
			\'he_il\'=>\'Hebrew (Israel)\',
			\'hi_in\'=>\'Hindi (India)\',
			\'hr_ba\'=>\'Croatian (Bosnia and Herzegovina)\',
			\'hr_hr\'=>\'Croatian (Croatia)\',
			\'hu_hu\'=>\'Hungarian (Hungary)\',
			\'hy_am\'=>\'Armenian (Armenia)\',
			\'id_id\'=>\'Indonesian (Indonesia)\',
			\'is_is\'=>\'Icelandic (Iceland)\',
			\'it_ch\'=>\'Italian (Switzerland)\',
			\'it_it\'=>\'Italian (Italy)\',
			\'ja_jp\'=>\'Japanese (Japan)\',
			\'ka_ge\'=>\'Georgian (Georgia)\',
			\'kk_kz\'=>\'Kazakh (Kazakhstan)\',
			\'kn_in\'=>\'Kannada (India)\',
			\'ko_kr\'=>\'Korean (Korea)\',
			\'kok_in\'=>\'Konkani (India)\',
			\'ky_kg\'=>\'Kyrgyz (Kyrgyzstan)\',
			\'lt_lt\'=>\'Lithuanian (Lithuania)\',
			\'lv_lv\'=>\'Latvian (Latvia)\',
			\'mi_nz\'=>\'Maori (New Zealand)\',
			\'mk_mk\'=>\'FYRO Macedonian (Former Yugoslav Republic of Macedonia)\',
			\'mn_mn\'=>\'Mongolian (Mongolia)\',
			\'mr_in\'=>\'Marathi (India)\',
			\'ms_bn\'=>\'Malay (Brunei Darussalam)\',
			\'ms_my\'=>\'Malay (Malaysia)\',
			\'mt_mt\'=>\'Maltese (Malta)\',
			\'nb_no\'=>\'Norwegian (Bokm?l) (Norway)\',
			\'nl_be\'=>\'Dutch (Belgium)\',
			\'nl_nl\'=>\'Dutch (Netherlands)\',
			\'nn_no\'=>\'Norwegian (Nynorsk) (Norway)\',
			\'ns_za\'=>\'Northern Sotho (South Africa)\',
			\'pa_in\'=>\'Punjabi (India)\',
			\'pl_pl\'=>\'Polish (Poland)\',
			\'ps_ar\'=>\'Pashto (Afghanistan)\',
			\'pt_br\'=>\'Portuguese (Brazil)\',
			\'pt_pt\'=>\'Portuguese (Portugal)\',
';


$content = preg_replace('/(?(?=")"(\\\\"|[^"])*"|\'(\\\\\'|[^\'])*\')/', '""', $content);

var_export($content);