Are pages in PHP mutually called require ()? And? Require_once ()??? Require_once (): the same file is called only once ??? It is usually placed at the beginning of the PHP program. before the PHP program is executed, it will first read require? If an error occurs in the specified imported file, it is fatal. Include ()? And? Include_once ()??? Pages in includ PHP call each other
Require ()? And? Require_once ()
? ? ? Require_once (): the same file is called only once.
? ? ? It is usually placed at the beginning of the PHP program. before the PHP program is executed, it will first read require?
If an error occurs in the specified imported file, it is fatal.
Include ()? And? Include_once ()
? ? ? Include_once ()
? : The same file is called only once.
? ? ? It can be placed in any position of the PHP program. when the PHP program is executed, it will first read?
If an error occurs, the system will prompt the file imported by include.
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