若要打印出完整的sql语句，可将以下代码复制到AppServiceProvider中的boot方法中：
或者在自己定义的middleware里面，确保中间件在sql前面。
\DB::listen(
function ($sql) {
foreach ($sql->bindings as $i => $binding) {
if ($binding instanceof \DateTime) {
$sql->bindings[$i] = $binding->format('\'Y-m-d H:i:s\'');
} else {
if (is_string($binding)) {
$sql->bindings[$i] = "'$binding'";
}
}
}
// Insert bindings into query
$query = str_replace(array('%', '?'), array('%%', '%s'), $sql->sql);
$query = vsprintf($query, $sql->bindings);
// Save the query to file
$logFile = fopen(
storage_path('logs' . DIRECTORY_SEPARATOR . date('Y-m-d') . '_query.log'),
'a+'
);
fwrite($logFile, date('Y-m-d H:i:s') . ': ' . $query . PHP_EOL);
fclose($logFile);
}
);