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php中魔法常量_FILE_,_LINE_,__FUNCTION__用法

WBOY
Release： 2016-06-13 10:04:00
Original
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本文章主要是讲到了关于魔法常量_FILE_,_LINE_,__FUNCTION__，有需要的同学可以参考一下简单实用的一个实例。


名称
 描述
 
_FILE_
 当前文件名
 
_LINE_
 当前行号
 
_FUNCTION_
 当前函数名
 
_CLASS_
 当前类名
 
_METHOD_
 当前方法名

 

所谓的魔法常量，并不是真的常量，而是根据场合去获取固定值的变量

 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
Related labels：
fi file function line php host about constant article usage magic
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