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<?php var_dump(parse_url('http://solveme.safflower.kr/prob/url_filtering/?do_you_want_flag=yes&b=12.3.3.4:1233', PHP_URL_QUERY));
Output for 7.1.0 - 7.1.33, 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 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
string(36) "do_you_want_flag=yes&b=12.3.3.4:1233"
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 string(36) "do_you_want_flag=yes&b=12.3.3.4:1233"

preferences:
178.79 ms | 402 KiB | 198 Q