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int(32)
string(12) "Hello world!"
float(32.5)
array(3) { [0]=> string(3) "red" [1]=> string(5) "green" [2]=> string(4) "blue" }
array(4) { [0]=> int(32) [1]=> string(12) "Hello world!" [2]=> float(32.5) [3]=> array(3) { [0]=> string(3) "red" [1]=> string(5) "green" [2]=> string(4) "blue" } }
int(32) string(12) "Hello world!"