3v4l.org

run code in 150+ php & hhvm versions
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<?php var_dump(substr('foo', 0, false)); var_dump(parse_url('foo')); var_dump(parse_url('http://3v4l.org/'));
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
string(0) "" array(1) { ["path"]=> string(3) "foo" } array(3) { ["scheme"]=> string(4) "http" ["host"]=> string(8) "3v4l.org" ["path"]=> string(1) "/" }