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run code in 150+ php & hhvm versions
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<?php $array = array('sort'=>'DESC','attr'=>array('he','ha')); echo http_build_query($array);
Output for 5.1.3 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
sort=DESC&attr%5B0%5D=he&attr%5B1%5D=ha
Output for 5.0.0 - 5.1.2
sort=DESC&attr[0]=he&attr[1]=ha
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: http_build_query() in /in/Tg5PG on line 3
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: http_build_query() in /in/Tg5PG on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: http_build_query() in /in/Tg5PG on line 3