Usage of magic constants _FILE_,_LINE_,__FUNCTION__ in php_PHP tutorial

This article mainly talks about the magic constants _FILE_, _LINE_, __FUNCTION__. Students in need can refer to a simple and practical example.

Name
Description

_FILE_
Current file name

_LINE_
Current line number

_FUNCTION_
Current function name

_CLASS_
Current class name

_METHOD_
Current method name

The so-called magic constants are not real constants, but variables that obtain fixed values ​​according to the situation

The code is as follows

代码如下	复制代码
echo __FILE__; echo ' ';   echo __LINE__; echo ' ';   function funcTest() {     echo __FUNCTION__; } funcTest(); ?>   output D:AppServwwwBasic7demo15.php 5 funcTest

Copy code

echo __FILE__;

echo '
'; echo __LINE__; echo '
'; function funcTest() {

echo __FUNCTION__; }

funcTest(); ?> output D:AppServwwwBasic7demo15.php 5 funcTest http://www.bkjia.com/PHPjc/631294.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/631294.htmlTechArticleThis article mainly talks about the magic constants _FILE_, _LINE_, __FUNCTION__. Students in need can refer to the simple A practical example. Name Description _FILE_ Current file name _LI...