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A PHP Error was encountered Severity: Notice Message: Only variable references should be returned by reference Filename: core/Common.php Line Number: 257

An error appear after upgraded Xampp version 3.2.2. This system using Codeigniter 2.1.2.

To solve:-

Change it in your Common.php
if (count($replace) > 0){
    foreach ($replace as $key => $val){
        if (isset($config[$key])){
            $config[$key] = $val;
        }
    }
}

$_config[0] =& $config;
return $_config[0];

Credit to:-
https://stackoverflow.com/questions/30785717/codeigniter-error-variable-references

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