Introduction to php magic constant examples, php magic constants_PHP tutorial

Introduction to php magic constant examples, php magic constants

Magic constants PHP provides a large number of predefined constants to any script it runs. Our commonly used php magic constants are_ _CLASS__ __FUNCTION__ __LINE__ __FILE__ __DIR__ __METHOD__. This article introduces php magic constants to you through php examples

Example:

<span>class</span><span> MoShu{
 </span><span>public</span> <span>function</span><span> moshu() {
  </span><span>echo</span> '当前类名：' . <span>__CLASS__</span> . "<br />"<span>;
  </span><span>echo</span> '当前方法名：' . <span>__FUNCTION__</span> . "<br />"<span>;
  </span><span>echo</span> '当前文件中所在的行数：' . <span>__LINE__</span> . "<br />"<span>;
  </span><span>echo</span> '当前文件绝对路径：' . <span>__FILE__</span> . "<br />"<span>;
  </span><span>echo</span> '当前文件所在的绝对路径的文件夹：' . __DIR__ . "<br />"<span>;
  </span><span>echo</span> '返回类名::方法名：' . <span>__METHOD__</span> . "<br />"<span>;
 }
}

</span><span>$moshu</span> = <span>new</span><span> moshu();
</span><span>$moshu</span>->moshu();

Copy the code here and run it

The results are as follows:

<span>当前类名：MoShu
当前方法名：moshu
当前文件中所在的行数：</span>10<span>
当前文件绝对路径：D</span>:＼xampp＼htdocs＼test＼moshu.<span>php
当前文件所在的绝对路径的文件夹：D</span>:<span>＼xampp＼htdocs＼test
返回类名</span>::方法名：MoShu::moshu

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