后端开发|php教程
php,html5
后端开发-php教程
添加如下几天语句页面变为空白，删除正常
echo “isset($tireqty)”.isset($tireqty).”
“;
echo “isset($nothere)”.isset($nothere).”
“;
echo “isset($tireqty)”.empty($tireqty).”
“;
echo “isset($nothere)”.empty($nothere).”
“;
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下面列出完整代码
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Order processed at".date(H:i, jS F Y)." 帝国美女图片模板源码,vscode查找结果复制,ubuntu 访问 路径,tomcat端口没起来,sqlite如何设置数据库,爬虫工程师用不用英语,php数字大写转换,包年seo推广哪家好,c cms网站管理系统,房屋租赁系统模板lzw "; echo " Your order is as follow: "; echo $tireqty." tireqty "; echo $oilqty." oilqty "; echo $sparkqty." spark plugs "; $totalqty = 0; $totalqty = $tireqty + $oilqty + $sparkqty; echo "Items ordered: ".$totalqty." "; $totalamount = 0.00; $totalamount = $tireqty * TIREPRICE +$oilqty * OILPRICE + $sparkqty * SPARKPRICE; echo "Subtotal: $".number_format($totalamount,2)." "; $taxrate = 0.10; //total sales tax is 10% $totalamount = $totalamount * (1 + $taxrate); echo "Total including tax: $".number_format($totalamount,2)." "Boss Auto Parts
Order Result <?php define(TIREPRICE,100); define(OILPRICE,10); define(SPARKPRICE,4); $tireqty = $_POST[ ireqty]; $oilqty = $_POST[oilqty]; $sparkqty = $_POST[sparkqty]; echo "
//echo “isset($tireqty)”.isset($tireqty).”
“;
//echo “isset($nothere)”.isset($nothere).”
“;
//echo “isset($tireqty)”.empty($tireqty).”
“;
//echo “isset($nothere)”.empty($nothere).”
“;
?>
回复内容：
添加如下几天语句页面变为空白，删除正常
echo “isset($tireqty)”.isset($tireqty).”
“;
echo “isset($nothere)”.isset($nothere).”
“;
echo “isset($tireqty)”.empty($tireqty).”
“;
echo “isset($nothere)”.empty($nothere).”
“;
下面列出完整代码
Order processed at".date(H:i, jS F Y)." "; echo " Your order is as follow: "; echo $tireqty." tireqty "; echo $oilqty." oilqty "; echo $sparkqty." spark plugs "; $totalqty = 0; $totalqty = $tireqty + $oilqty + $sparkqty; echo "Items ordered: ".$totalqty." "; $totalamount = 0.00; $totalamount = $tireqty * TIREPRICE +$oilqty * OILPRICE + $sparkqty * SPARKPRICE; echo "Subtotal: $".number_format($totalamount,2)." "; $taxrate = 0.10; //total sales tax is 10% $totalamount = $totalamount * (1 + $taxrate); echo "Total including tax: $".number_format($totalamount,2)." "Boss Auto Parts
Order Result <?php define(TIREPRICE,100); define(OILPRICE,10); define(SPARKPRICE,4); $tireqty = $_POST[ ireqty]; $oilqty = $_POST[oilqty]; $sparkqty = $_POST[sparkqty]; echo "
//echo “isset($tireqty)”.isset($tireqty).”
“;
//echo “isset($nothere)”.isset($nothere).”
“;
//echo “isset($tireqty)”.empty($tireqty).”
“;
//echo “isset($nothere)”.empty($nothere).”
“;
?>
前面的引号类的变量$nothere没有定义会报错，你没有开启debug模式就不会报错，也不会显示
isset和empty返回的都是bool类型，自然是不会显示的
echo “isset($tireqty)”…如果$tireqty没有定义会出错，因为这里双引号里面的isset是作为字符输出的
error_reporting(E_ALL);
ini_set(“display_errors”, 1);
添加到页面顶端
