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I have installed Toolbox plugins...
When i look in Global Vars in my toolbox there is some Warning: htmlspecialchars() expects parameter 1 to be string, array given in /var/www/html/public_html/admin/toolbox/varinfo.php on line 79

This is my varinfo.php
function print_array($ara, $var) {
$retval = '<table border="1"><tr><th colspan="2" align="left">Array -- $' . $ara . '</th></tr>';
foreach ($var as $key => $value) {
$retval .= '<tr><td valign="top" width="100">' . htmlspecialchars($key) . '</td><td>';

(LINE 79 $retval .= htmlspecialchars($value);

$retval .= '</td></tr>';
}
$retval .= '</table>';
return $retval;
}

Can anyone tell me what makes this warning