三元运算符 表达式1 ？ 表达式2 : 表达式3 还有点没明白，求解释？

Answer 1

Ternary operator expression 1? Expression 2: Expression 3 I still don’t understand. Could you please explain? -PHP Chinese website Q&A-Ternary operator expression 1? Expression 2: Expression 3 I still don’t understand. Could you please explain? -PHP Chinese website Q&A

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Answer 2

表达式1成立，则输出的结果是表达式2，否则的话是表达式3；