我有这段代码抛出错误：
<?php
$val1 = $totalsum;
$res = ( $val1 / $val2) * 100;
$val2 = count($allcontent);
$res = ( $val1 / $val2) * 100;
// 1 digit after the decimal point
$res = round($res, 1); // 66.7
echo "Success: ";
echo $res;
echo "%";
?>
我尝试添加此行：
if ($res === 0)
{
echo "not eligible";
}
但它仍然会给出错误。有任何想法吗？
您想在除法发生之前检查$ val2：
<?php
$val1 = $totalsum;
$val2 = count($allcontent);
if($val2 != 0)
{
$res = ( $val1 / $val2) * 100;
// 1 digit after the decimal point
$res = round($res, 1); // 66.7
echo "Success: ".$res."%";
}
else
{
echo "Count of allcount was 0";
}
?>
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