How does PHP catch debude_once exceptions?

How does PHP capture the include_once error? How does PHP catch errors of include_once and require_once? If the file does not exist or there are compilation and other errors in the file, can it be captured? DEMO: try {& nbsp; include_once (& quot; tttt. php & quot;); how does PHP catch the include_once error?
How does PHP catch errors of include_once and require_once?

If the file does not exist or there are compilation and other errors in the file, can it be captured?

DEMO:
Try {
Include_once ("t/ttt. php ");
} Catch (Exception $ e ){
Echo 'caught exception: '. $ e-> getMessage ();
}


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You can use this method as follows:
If (! File_exists ("t/ttt. php "))
{
Include_once ("t/ttt. php ");
}
The require_once error is a compile-time error, not a RUNTIME error, which cannot be captured.
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You can use file_exists () to check if the file does not exist.
File program errors can be checked using isset, is _ series functions

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Bangding
Not captured
Only read the error report
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At the top of the page, no error reports will be reported, and require_once will be used each time. if this error occurs, you will see the error prompt on the page!
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File_exists before processing...