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<?php $name = 'base_url'; $value = 'new_value'; $config = '$config["base_url"] = "old_value";'; $config = preg_replace('/\[\''.$name.'\'\]\s*=\s*(\'|\")(.*)\\1;/', "['".$name."'] = '$value';", $config); echo '<pre>', var_dump($config), '</pre>';

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