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What is the difference between include_once "/include/a. php" and include_once "./include/a. php? Solution

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Author: User
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Include_once & quot;./include/a. php & quot; and include_once & quot; ../include/a. php & quot; what is the difference ??? Include_once & quot;./include/a include_once "./include/a. php" and include_once "../include/a. php" What is the difference ???
What is the difference between include_once "./include/a. php" and include_once ".../include/a. php ???

------ Solution --------------------
Is it a tongue twister?
Depending on the location of the referenced file, different file paths are introduced. different paths have different natural functions.
One is/include/a. php under the current directory.
One is/include/a. php under the root directory.

/Include. php
/Include/a. php
/Include/a. php

If the currently referenced file is in include. php under include/include
Include_once "./include/a. php"
Then it will reference include/a. php

Include_once "../include/a. php"
It will reference include/a. php

/Include. php
/Include/a. php
/Include/a. php
If the reference is in the root directory include. php
The above two references will point to the same file./include/a. php

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