Php magic constant _ FILE _, _ LINE _ ,__ FUNCTION _ usage _ PHP Tutorial

In php, the magic constants _ FILE _, _ LINE _ ,__ FUNCTION _ are used. This article mainly describes the magic constants _ FILE _, _ LINE _ ,__ FUNCTION __. if you need them, you can refer to a simple and practical example. Name Description _ FILE _ current FILE name _ LI this article mainly describes the magic constants _ FILE _, _ LINE _ ,__ FUNCTION __, if you need it, you can refer to a simple and practical example.

Name
Description

_ FILE _
Current file name

_ LINE _
Current row number

_ FUNCTION _
Current function name

_ CLASS _
Current class name

_ METHOD _
Current method name

The so-called magic constant is not a real constant, but a variable that gets a fixed value based on the occasion.

The code is as follows:
Echo _ FILE __; Echo' '; Echo _ LINE __; Echo' '; Function funcTest () { Echo _ FUNCTION __; } FuncTest (); ?> Output D: AppServwwwBasic7demo15. php 5 FuncTest

Bytes. Name Description _ FILE _ current FILE name _ LI...