{"record":{"id":"3181ed2b65245a17","repo":"bcit-ci/CodeIgniter","slug":"session-configured-driver-driver-was-not-found","errorCode":null,"errorMessage":"Session: Configured driver '$driver' was not found. Aborting.","messagePattern":"Session: Configured driver '\\$driver' was not found\\. Aborting\\.","errorType":"exception","errorClass":"UnexpectedValueException","httpStatus":null,"severity":"error","filePath":"system/libraries/Session/Session.php","lineNumber":252,"sourceCode":"\t\tif ( ! class_exists($class, FALSE) && file_exists($file_path = APPPATH.'libraries/Session/drivers/'.$class.'.php'))\n\t\t{\n\t\t\trequire_once($file_path);\n\t\t\tif (class_exists($class, FALSE))\n\t\t\t{\n\t\t\t\treturn $class;\n\t\t\t}\n\t\t}\n\n\t\tif ( ! class_exists('CI_'.$class, FALSE))\n\t\t{\n\t\t\tif (file_exists($file_path = APPPATH.'libraries/Session/drivers/'.$class.'.php') OR file_exists($file_path = BASEPATH.'libraries/Session/drivers/'.$class.'.php'))\n\t\t\t{\n\t\t\t\trequire_once($file_path);\n\t\t\t}\n\n\t\t\tif ( ! class_exists('CI_'.$class, FALSE) && ! class_exists($class, FALSE))\n\t\t\t{\n\t\t\t\tthrow new UnexpectedValueException(\"Session: Configured driver '\".$driver.\"' was not found. Aborting.\");\n\t\t\t}\n\t\t}\n\n\t\tif ( ! class_exists($prefix.$class, FALSE) && file_exists($file_path = APPPATH.'libraries/Session/drivers/'.$prefix.$class.'.php'))\n\t\t{\n\t\t\trequire_once($file_path);\n\t\t\tif (class_exists($prefix.$class, FALSE))\n\t\t\t{\n\t\t\t\treturn $prefix.$class;\n\t\t\t}\n\n\t\t\tlog_message('debug', 'Session: '.$prefix.$class.\".php found but it doesn't declare class \".$prefix.$class.'.');\n\t\t}\n\n\t\treturn 'CI_'.$class;\n\t}\n\n\t// ------------------------------------------------------------------------","sourceCodeStart":234,"sourceCodeEnd":270,"githubUrl":"https://github.com/bcit-ci/CodeIgniter/blob/3658d731eaabe6117298a105ffb5b9dd59e190ce/system/libraries/Session/Session.php#L234-L270","documentation":"Error \"Session: Configured driver '$driver' was not found. Aborting.\" thrown in bcit-ci/CodeIgniter.","triggerScenarios":"Thrown at system/libraries/Session/Session.php:252 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"3658d731eaabe6117298a105ffb5b9dd59e190ce","analyzedAt":"2026-08-17T02:34:56.929Z","schemaVersion":2},"datasetVersion":"2026-08-17T04:17:16.089Z"}