php - Why is var_dump((int)(PHP_INT_MAX + 1)) a negative number? -

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i pulled result here:

and interestingly, result of var_dump((int)(php_int_max + 1)) displayed negative number (in case of specific example, display int(-9223372036854775808)). again, key here candidate know value displayed negative number.

is int negative because adding 1 overflow integer bits , change bit representing sign of int? what's reason?


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