這(zhè)些(xiē)類型聲明(míng)隻能(néng)在類中使用(yòng)。
self ¶
The value must be an instanceof the same class as the one in which the type declaration is used.
parent ¶
值必須是 instanceof 使用(yòng)了(le)類型聲明(míng)的父級類。
static ¶
static is a return-only type which requires that the value returned must be an instanceof the same class as the one the method is called in. 自(zì) PHP 8.0.0 起可用(yòng)。
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