'PHP 8.1.2 realpath returning false

I am currently upgrading my PHP website from 7.4 to 8.1.2 but I'm having an issue with 'realpath'. No matter what directory I put in the variable '$install_folder' just shows as false. It's bizarre as I tested this on my PHP 7.4 website and the code works as it should.

$install_folder = realpath(__DIR__ . '/../../../');

I have tried to cheese the fix by:

$dir = __DIR__; 
$install_folder = realpath($dir . '/../../../');

Any suggestions would be highly appreciated!

php


Solution 1:[1]

Is the php cli interpreter installed on your system? On Debian/Ubuntu based systems this is the phpX-cli package.

IF the cli package is installed, I'd want to see the output of a test script that might shed some light on things.

#/path/to/php8

$dir = __DIR__;
echo $dir;
$install_folder = realpath($dir);
echo $install_folder;

Run this script as a regular user, and then as the user running the web site.

Sources

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Source: Stack Overflow

Solution Source
Solution 1 General Grievance

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