One nice feature of PHP is variable variables.

PHP的一个优秀特性是可变变量。

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A variable that has an initial value. An initial value may be specified when defining a variable. Variables usually should be initialized.

含有初始值的变量。当定义变量时，可指定初始值。变量通常要初始化。

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A variable that has an initial value. An initial value may be specified when defining a variable. Variables usually should be initialized.

含有初始值的变量。当定义变量时，可指定初始值。变量通常要初始化。

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