3v4l.org

run code in 300+ PHP versions simultaneously
<?php $string = ' Test1,One line Test2,"Two lines Hello" Test3,One line '; echo preg_replace_callback('~"[^"]*"~', function($m) { return preg_replace('~\R+~', '', $m[0]); }, $string);
Output for 7.1.25 - 7.1.30, 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 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.27, 8.4.1 - 8.4.14
Test1,One line Test2,"Two lines Hello" Test3,One line
preferences:
163.78 ms | 407 KiB | 5 Q