php中的变量都是弱类型的：您可以将变量指定为整型，稍后将其指定为字符型。

Variables in PHP are weakly typed: you can assign a variable as an integer and later as a character.

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支持的变量包括整型、浮点型的数字、字符串、数组和对象。

Supported variables include integers, floating point Numbers, strings, arrays, and objects.

youdao

支持的变量包括整型、浮点型的数字、字符串、数组和对象。

Supported variables include integers, floating point Numbers, strings, arrays, and objects.

youdao