Kohana: Cannot redeclare class - php

Question

Unable to start project in Kohana. I have cloned it from github, than set my database info in config file and get error: Cannot redeclare class.
I have 2 methods autoload functions.
public static function auto_load($class, $directory = 'classes')
{
// Transform the class name according to PSR-0
$class = ltrim($class, '\\');
$file = '';
$namespace = '';
if ($last_namespace_position = strripos($class, '\\'))
{
$namespace = substr($class, 0, $last_namespace_position);
$class = substr($class, $last_namespace_position + 1);
$file = str_replace('\\', DIRECTORY_SEPARATOR, $namespace).DIRECTORY_SEPARATOR;
}
$file .= str_replace('_', DIRECTORY_SEPARATOR, $class);
if ($path = Kohana::find_file($directory, $file))
{
// Load the class file
require_once $path;
// Class has been found
return TRUE;
}
// Class is not in the filesystem
return FALSE;
}
/**
* Provides auto-loading support of classes that follow Kohana's old class
* naming conventions.
*
* This is included for compatibility purposes with older modules.
*
* #param string $class Class name
* #param string $directory Directory to load from
* #return boolean
*/
public static function auto_load_lowercase($class, $directory = 'classes')
{
// Transform the class name into a path
$file = str_replace('_', DIRECTORY_SEPARATOR, strtolower($class));
if ($path = Kohana::find_file($directory, $file))
{
// Load the class file
require_once $path;
// Class has been found
return TRUE;
}
// Class is not in the filesystem
return FALSE;
}
I have tried to add class_exists() before require() but it doesn't work& What I should do to start a project?

Answer 1

Possibly required class is included in some other file already.
I don't know how exactly you check class collision problem, but you should do something like:
function include_quietly($file) {
$conflicts = false;
$txt = file_get_contents($file);
preg_match_all("#class\s+(\w+)\s*{#muis", $txt, $matches, PREG_SET_ORDER);
foreach ($matches as $m) {
if (class_exists($m[1])) {
$conflicts = true;
break;
}
}
if (!$conflicts)
include_once $file;
else
echo "include conflicts in file {$file}\n";
}
include_quietly($path);