在php中,$string = 123; 与 $string = "123"; 不加引号和加引号区别是什么？

Answer 1

In php, what is the difference between $string = 123; and $string = "123"; without quotes and with quotes? -PHP Chinese website Q&A-In PHP, what is the difference between $string = 123; and $string = "123"; without quotes and with quotes? -PHP Chinese website Q&A

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Answer 2

不加引号，是数字类型，说明$string这个变量的值是数字类型123，加上引号，是字符串