未定义数组索引: sbiao

<div style="width: 94%;border-top:1px solid  #ccc;margin:0 auto;padding-top:15px;padding-bottom: 40px">
      <p style="height: 24px;line-height: 24px;margin-top:10px;font-size: 18px;color: #434545;margin-bottom: 10px;"><?php echo $zhong['yname']; ?></p>
      <p style="height: 24px;line-height: 24px;"><span style='display: inline-block;text-align: right;'>Item No：</span><span style="display: inline-block;"><?php echo $zhong['pin']; ?></span></p>
            <p style="height: 24px;line-height: 24px;"><span style='display: inline-block;text-align: right;'>Size（mm）：</span><span style="display: inline-block;"><?php echo $zhong['cun']; ?></span></p>
            
            <p style="height: 24px;line-height: 24px;"><span style='display: inline-block;text-align: right;'>Working voltage（V）：</span><span style="display: inline-block;"><?php echo $zhong['ya']; ?></span></p>
            <p style="height: 24px;line-height: 24px;"><span style='display: inline-block;text-align: right;'>Working current（mA）：</span><span style="display: inline-block;"><?php echo $zhong['liu']; ?></span></p>
            <p style="height: 24px;line-height:24px;"><span style='display: inline-block;text-align: right;'>Brightness（mcd）：</span><span style="display: inline-block;"><?php echo $zhong['du']; ?></span></p>
            <?php if($v['sbiao'] != ''): ?>
            <p style="height: 24px;line-height: 24px;"><span style='display: inline-block;text-align: right;'>Chromatic coordinates</span><span style="display: inline-block;"><?php echo $v['sbiao']; ?></span></p>
            <?php endif; if($v['chang'] != ''): ?>
            <p style="height: 24px;line-height: 24px;"><span style='display: inline-block;text-align: right;'>Wavelength（nm）</span><span style="display: inline-block;"><?php echo $v['chang']; ?></span></p>
            <?php endif; ?>
            <p style="height: 24px;line-height: 24px;display: none"><span style='display: inline-block;text-align: right;'>Wavelength（nm）：</span><span style="display: inline-block;"><?php echo $zhong['chang']; ?></span></p>
            <?php if($zhong['number'] != ''): ?>
            <p style="height: 24px;line-height: 24px;"><span style='display: inline-block;text-align: right;'>Uniformity（≥%）：</span><span style="display: inline-block;"><?php echo $zhong['number']; ?></span></p>
            <?php endif; ?>
            <p style="height: 24px;line-height:24px;"><span style='display: inline-block;text-align: right;'>Working temperature（℃）：</span><span style="display: inline-block;"><?php echo $zhong['shi']; ?></span></p>