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<?php $query_string = [ 'one' => 1, 'two' => '', 'three' => null, // gets omitted 'four' => ' ', // gets encoded 'five' => "&test=test" // gets encoded ]; echo http_build_query($query_string); echo "\n---\n"; echo http_build_query($query_string, '', '&amp;'); echo "\n\n\n\n\n";
Output for 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 - 8.3.4, 8.3.6
one=1&two=&four=+&five=%26test%3Dtest --- one=1&amp;two=&amp;four=+&amp;five=%26test%3Dtest
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 one=1&two=&four=+&five=%26test%3Dtest --- one=1&amp;two=&amp;four=+&amp;five=%26test%3Dtest
preferences:
161.32 ms | 402 KiB | 174 Q