PHP - ejecutar archivos de texto sql

<?php

$conn =new mysqli('localhost', 'root', '' , 'blog_samples');

$query = '';

$sqlScript = file('database-script.sql');

foreach ($sqlScript as $line)   {

        $startWith = substr(trim($line), 0 ,2);

        $endWith = substr(trim($line), -1 ,1);

        if (empty($line) || $startWith == '--' || $startWith == '/*' || $startWith == '//') {

                continue;

        }

        $query = $query . $line;

        if ($endWith == ';') {

                mysqli_query($conn,$query) or die('<div class="error-response sql-import-response">Problem in executing the SQL query <b>' . $query. '</b></div>');

                $query= '';

        }

}

echo '<div class="success-response sql-import-response">SQL file imported successfully</div>';

?>