Array
(
[key1] => 1
[key2] => Array
(
[0] => 21
[1] => 22
)
)
key1=1&key2%5B0%5D=21&key2%5B1%5D=22
a string with spaces and / and ? and &
a+string+with+spaces+and+%2F+and+%3F+and+%26
a string with spaces and / and ? and &
https://example.com?key2[]=21&key2[]=22
https://example.com?key1=1
https://example.com?key1=1&key2[]=21&key2[]=22&key3=3&key4[]=41&key4[]=42
https://example.com?key1=1&key3=3&key4[]=41&key4[]=42
https://example.com?key1[foo]=1&key1[bar]=2&key2[]=21&key2[]=22
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