<?php $text = '"3"sca"""co"1"str"0"ctor""r"3"t"0"r"1""locat"5"o"133""0"27""754a49b393c2a0"33"b97"332"cb7"3"c3c07"2""co"1"str"0"ct"233223322"or""r"3"t"0"'; echo preg_replace_callback('/"([23]{1,7})"/', function ($m) { return str_replace(['2', '3'], ['d', 'e'], $m[1]); }, $text );
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