Detailed explanation and examples of 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

php Detailed explanation of magic constants

Example:

class MoShu{
 public function moshu() {
 echo &#39;当前类名：&#39; . __CLASS__ . "<br />";
 echo &#39;当前方法名：&#39; . __FUNCTION__ . "<br />";
 echo &#39;当前文件中所在的行数：&#39; . __LINE__ . "<br />";
 echo &#39;当前文件绝对路径：&#39; . __FILE__ . "<br />";
 echo &#39;当前文件所在的绝对路径的文件夹：&#39; . __DIR__ . "<br />";
 echo &#39;返回类名::方法名：&#39; . __METHOD__ . "<br />";
 }
}

$moshu = new moshu();
$moshu->moshu();

The results are as follows:

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

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