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<?php $str = "123456789 123456789\n123 123 123"; var_dump(wordwrap($str, 25, "\n"));
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 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 - 8.2.19, 8.3.0 - 8.3.7
string(31) "123456789 123456789 123 123 123"

preferences:
182.88 ms | 404 KiB | 189 Q