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- __?:__
- Expression expr1 ?: expr3 returns expr1 if expr1 evaluates to TRUE, and expr3 otherwise.
- __??__
- The null coalescing operator (??) has been added as syntactic sugar for the common case of needing to use a ternary in conjunction with isset().
- It returns its first operand if it exists and is not NULL; otherwise it returns its second operand.
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