ช่วยดูโค้ดหน่อยครับ php มัน error ในการแสดงกราฟคัรบ ใน appserv ไม่เป็น ขึ้น server จริง error ทันที

<?php
    // css
    $graphs[] = '<style type="text/css">';
    $graphs[] = 'div#demo{border:2px solid #666;background-color:#EFEFEF;width:'.$graph_width.'px;height:'.$graph_height.'px;position:relative;}';
    $graphs[] = 'div#demo *{margin:0;padding:0;font-family:Helvetica,Geneva,sans-serif;font-size:9px;}';
    $graphs[] = 'div#demo > dl.graph-grid{margin-left:'.($label_width + $padding_width).'px;}';
    $graphs[] = 'div#demo > dl.graph-grid > dd{border-bottom:1px solid #C4C4C4;float:left;height:'.($graph_height / $grid_rows).'px;width:'.$gw.'px;}';
    $graphs[] = 'div#demo > dl.graph-grid > dt{position:absolute;height:'.$graph_height.'px;top:0;border-left:1px solid #C4C4C4;}';
    $graphs[] = 'div#demo > dl.graph-grid > dt > span{border-right:1px dotted #C4C4C4;float:left;width:'.(($gw - $grid_cols) / $grid_cols).'px;height:'.($graph_height - $padding_width).'px;position:relative;}';
    $graphs[] = 'div#demo > dl.graph-grid > dt > span > span{position:absolute;bottom:0;left:0;margin-bottom:-1.2em;margin-left:'.($gw / $grid_cols / 2).'px;width:'.($gw / $grid_cols).'px;text-align:center;}';
    $graphs[] = 'div#demo > dl.graph-data{position:absolute;top:0;margin:'.$padding_width.'px;}';
    $graphs[] = 'div#demo > dl.graph-data > dd{display:table;margin-bottom:10px;clear:both;}';
    $graphs[] = 'div#demo span.label-row{float:left;width:'.$label_width.'px;line-height:'.$bar_height.'px;}';
    $graphs[] = 'div#demo span.bar-graph{border-color:#E96AE8 #9A2B99 #000000 #E96AE8;border-width:1px;border-style:solid;float:left;}';
    $graphs[] = 'div#demo span.value-graph{float:right;margin-right:5px;height:'.$bar_height.'px;line-height:'.$bar_height.'px;}';
    $graphs[] = '</style>';
    // วาดกราฟ
    $graphs[] = '<div id="demo">';
    $graphs[] = '<dl class="graph-grid">';
    for ($i = 1; $i < $grid_rows; $i++) {
        $graphs[] = '<dd></dd>';
    }
    $graphs[] = '<dt>';
    for ($i = 0; $i < $grid_cols; $i++) {
        $graphs[] = '<span><span>'.((1 + $i) * $_v).'</span></span>';
    }
    $graphs[] = '</dt>';
    $graphs[] = '</dl>';
    $graphs[] = '<dl class="graph-data">';
    foreach ($datas AS $items) {
        $w = (($gw - 2) * $items[1]) / $max_value;
        $graphs[] = '<dd><span class="label-row">'.$items[0].'</span><span><span class="bar-graph" style="width:'.$w.'px;background-color:#D438D2;"><span class="value-graph">'.$items[1].'</span></span></span></dd>';
    }
    $graphs[] = '</dl>';
    $graphs[] = '</div>';
    echo implode("\n", $graphs);
?>