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I've three files:

index.php 
/include/conf.php 
/include/database.php

conf.php contains variables to connect to the database. database.php includes conf.php and has a function to return an entire table as array. index.php includes /include/database.php and calls get_table('users');

XDebug says me that $db_host, $db_user, $db_pass and $db_name are not defined.

How can I pass the Database related variables through external files?

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5 Answers

up vote 1 down vote accepted

Use PHP Define function

eg:

define("db_host", "localhost");

Or Use

PHP Session variable

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If you are using these variables in a function, use global like 

global $db_host, $db_user, $db_pass, $db_name;

and then you can use these variables. For details, see here.

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Define variable as constant in conf.php and then use this variable anywhere include conf.php

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It's not normal, I use include and I can call variables of the included page ! Try to include both files in the index.php !!

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use include(*path to php page*);

or include_once();

or require();

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