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<?php var_dump(bindec('11')); var_dump(base_convert('11', 2, 10));
Output for 5.6.38, 7.0.0 - 7.0.31, 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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
int(3) string(1) "3"

preferences:
177.6 ms | 403 KiB | 210 Q