Maximum execution time of 30 seconds exceeded

<?php
$baz='543216';
$mysqli = new mysqli('localhost', 'root', '', 'db_543216');
if ( $mysqli->connect_errno ) {
    die("Connect error (". $mysqli->connect_errno .") ". $mysqli->connect_error);
}
echo "<pre>";

$filename = '../imedia/DB/'.$baz.'/artiklisl.xml';
if (file_exists($filename)) {if ( $xml = simplexml_load_file($filename)){
 $sql = "INSERT INTO artiklisl (ID,IDA,IDJ,kolicina) VALUES (?,?,?,? )";
  $stmt = $mysqli->prepare($sql);
$stmt->bind_param('ssss',$ID,$IDA,$IDJ,$kolicina);
 $total = 0;
   foreach ( $xml->xpath('//Table1') as $ele ) {
            $ID         = $ele->ID;
            $IDA        = $ele->IDA;
            $IDJ        = $ele->IDJ;
            $kolicina   = $ele->kolicina;
            $stmt->execute();
            $total += $stmt->affected_rows;
        } echo "artiklisl Failed Total rows inserted = $total", PHP_EOL;
    } else {
        echo("artiklisl Failed to load $filename.");
    };
} else {
    echo("artiklisl File $filename was not found.");
}
?>



ther is SQL for create MYSQL table

CREATE TABLE `artiklisl` (
  `ID` int(11) DEFAULT NULL,
  `IDA` int(11) DEFAULT NULL,
  `IDJ` int(11) DEFAULT NULL,
  `kolicina` float DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
artikliSL.xml