linux環境安裝了lua，但是php中class_exists判斷為false，請問我該如何排查？

luaphp

出錯的代碼如下，class_exists("Lua",false)為false，我在linux下輸入lua，能夠調用lua，請問我該如何進一步排查：public function getTableData($tableName) {    $gameTable = array();    if (class_exists("Lua",false)) {        $lua = new Lua ();        $lua->eval ( <<

CODE
);

 $tablePath = GAME_LUA_PATH . "clientData/?.lua;"; $tablePath .= GAME_LUA_PATH . "serverData/?.lua;"; $gameTable = $lua->getTable ( $tablePath, $tableName ); }else { exit("lua has not been installed"); } return $gameTable;}

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