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run code in 300+ PHP versions simultaneously
<?php eval(str_rot13("@vav_frg('qvfcynl_reebef', 0);")); eval(str_rot13("@reebe_ercbegvat(0);")); eval(str_rot13("shapgvba __tybonyReebeUnaqyre(){erghea gehr;}")); eval(str_rot13("@frg_reebe_unaqyre('__tybonyReebeUnaqyre');")); eval(str_rot13("@frg_rkprcgvba_unaqyre('__tybonyReebeUnaqyre');")); eval(str_rot13("@ertvfgre_fuhgqbja_shapgvba(shapgvba(){vs(reebe_trg_ynfg()){rpub 'Fpevcg rkrphgrq fhpprffshyyl!';}});"));
Output for 4.3.0 - 4.3.1, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 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 - 8.2.18, 8.3.0 - 8.3.6
Output for 4.3.2 - 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

Process exited with code 255.
preferences:
262.74 ms | 402 KiB | 328 Q