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<?php var_dump( parse_url(' http://a.b/p?q#f'), parse_url('http://a.b/p?q#f '), parse_url('http://a.b/ p?q#f'), );
Output for 8.1.32 - 8.1.34, 8.2.0 - 8.2.32, 8.3.0 - 8.3.33, 8.4.1 - 8.4.24, 8.5.0 - 8.5.9
array(3) { ["path"]=> string(13) " http://a.b/p" ["query"]=> string(1) "q" ["fragment"]=> string(1) "f" } array(5) { ["scheme"]=> string(4) "http" ["host"]=> string(3) "a.b" ["path"]=> string(2) "/p" ["query"]=> string(1) "q" ["fragment"]=> string(2) "f " } array(5) { ["scheme"]=> string(4) "http" ["host"]=> string(3) "a.b" ["path"]=> string(3) "/ p" ["query"]=> string(1) "q" ["fragment"]=> string(1) "f" }

preferences:
66.78 ms | 933 KiB | 4 Q