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<?php $body = 'jasfjkdnjksdfnvv href="http://films.imhonet.ru/element/1341324/" ffr 3432 32 efwfrewqf ff3223423 href="http://imhonet.vk.com/?w=wall-14483947_3270" vfsdvfvfsdv '; var_dump(preg_replace( '/(?<=href=["\'])([^"\'\/]*?(?:\/\/)?[^"\'\/]*?imhonet\.ru\/?[^"\']*)/im',#'/(?<=href=["\'])([^"\']+i '$1?partner_id='.'142342314'.'&auth_hash='.'dsf34rt43ff34rt43r', $body));
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
string(212) "jasfjkdnjksdfnvv href="http://films.imhonet.ru/element/1341324/?partner_id=142342314&auth_hash=dsf34rt43ff34rt43r" ffr 3432 32 efwfrewqf ff3223423 href="http://imhonet.vk.com/?w=wall-14483947_3270" vfsdvfvfsdv "

preferences:
288.99 ms | 406 KiB | 460 Q