我的程序中有一个错误。如何解决
我已经编写了一个代码，其中，如果有人选择了该项目的复选框前缀，那么他必须输入一个数量值
问题在于，当他选中相应项目的复选框然后单击提交时，而不是输入任何数量值，都会引发错误，但是复选框被取消选择，然后他在数量框中输入了值，即使他没有再次选择相应的复选框，页面被提交。这是我程序中的错误，但我不知道如何解决
请告知我，只要他输入数量值和相应的复选框（如果未选中），则应该引发错误 以下是我的代码
<!DOCTYPE html>
<?php
session_start();
ob_start();
?>
<html lang="en">
<head>
<title>
Power For Light
</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="bootstrap/css/bootstrap.min.css">
<script type="text/javascript" src="jquery.min.js"></script>
<script type="text/javascript" src="bootstrap/js/bootstrap.min.js"></script>
<style type="text/css">
.colht{
height:200px;
border: 5px solid red;
}
.colht1{
height:100px;
border: 5px solid yellow;
}
.navbar-custom {
background-color:#ffffff;
color:#ffffff;
border-radius:0;
padding:10px;
}
.ht{
height:200px;
}
h2,h3{
text-align: center;
}
sup{
color:red;
}
</style>
</head>
<body onload="document.myForm.reset();">
<?php
$bequanerr=$bechkErr="";
$bequan=$ber= $bes="";
$c=0;
//$_SESSION['postid']=rand(10, 30);
if ($_SERVER["REQUEST_METHOD"] == "POST"):
if (!empty($_POST["bechk"])):
$c++;
if(empty($_POST["bequan"])):
echo "Hello";
$bequanerr="Please enter a quantity value";
else:
$bequan=test_input($_POST["bequan"]);
if($bequan <=0):
$bequanerr="Please enter a valid quantity value greater than 0";
else:
if(empty($_POST["ber"])):
$ber=400;
echo "400";
else:
$ber=test_input($_POST["ber"]);
endif;
if(empty($_POST["bes"])):
$bes=0;
else:
$bes=test_input($_POST["bes"]);
endif;
endif;
echo $ber." " . $bes. " " . $bequan;
// check if name only contains letters and whitespace
endif;
endif;
endif;
function test_input($data) {
$data = trim($data);
$data = stripslashes($data);
$data = htmlspecialchars($data);
return $data;
}
?>
<nav class="navbar navbar-inverse">
<div class="container">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#myNavbar">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="index.php"><img src="images/powerforlight.jpg" style= "max-height:50px; margin-top:-14px; "/></a>
</div>
<div class="collapse navbar-collapse" id="myNavbar">
<ul class="nav navbar-nav">
<li class="active"><a href="index.php">Home</a></li>
<li class=""><a href="aboutus.php">About Us</a></li>
<li class="">
<a class="" href="vendorcf.php">Vendor Contact Form</a>
</li>
<li class="">
<a class="" href="contactus.php">Contact Us</a>
</li>
</ul>
</div>
</div>
</nav>
<div class="container">
<div class="row">
<form name="myForm" class="form-horizontal " role="form" method="POST" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>" autocomplete="off">
<div class="panel panel-primary">
<div class="panel-heading text-center">
<h2 class="text-center">Bootstrap Design table</h2>
</div>
<div class="panel-body">
<div class="table-responsive">
<table class="table table-bordered table-hover">
<thead>
<tr>
<th rowspan="2">Household Items</th>
<th colspan="2">Running Wattage
</th>
<th colspan="2">Starting Wattage
</th>
<th rowspan="2">Quantity</th>
<th rowspan="2">Should start Parallely</th>
<th rowspan="2">Should start Serially</th>
</tr>
<tr>
<th>
Typical
</th>
<th> Specific </th>
<th>
Typical
</th>
<th> Specific </th>
</tr>
</thead>
<tbody>
<tr>
<td>
<label class="checkbox-inline"><input type="checkbox" name="bechk" value="be" <?php if (isset($bequan) && $bequan=="be") echo "checked";?>>Blanket, Electric
</label>
</td>
<td name="be1">400</td>
<td><input type="number" name="ber" /> </td>
<td name="be2">0</td>
<td><input type="number" name="bes" /> </td>
<td><input type="number" name="bequan" />
<p style="color:red"> <?php echo $bequanerr;?></p></td>
<td><input type="radio" name= "berad" class="rdo" value="P" <?php if (isset($bs)) echo "checked";?> /> </td>
<td><input type="radio" name= "berad" class="rdo" value="S" <?php if (isset($bs)) echo "checked";?> /> </td>
</tr>
</tbody>
</table>
<div class="control-group">
<!-- Button -->
<div class="controls col-xs-offset-3 col-xs-2">
<input type="submit" value="Submit" id="reg">
</div>
</div>
</div>
</div>
</div>
</form>
</div>
</div>
<?php ob_end_flush(); ?>
</body>
</html>
2 个答案:
答案 0 :(得分：0)
在elseif之后添加一个quantity >= 0语句。如果|| !empty($_POST["bequan"])，则添加一个或多个初始条件
像下面一样
if ($_SERVER["REQUEST_METHOD"] == "POST"):
if (!empty($_POST["bechk"]) || !empty($_POST["bequan"])):
$c++;
if(empty($_POST["bequan"])):
echo "Hello";
$bequanerr="Please enter a quantity value";
else:
$bequan=test_input($_POST["bequan"]);
if($bequan <=0):
$bequanerr="Please enter a valid quantity value greater than 0";
elseif(empty($_POST["bechk"])):
$bequanerr="Please check the check box";
else:
if(empty($_POST["ber"])):
$ber=400;
echo "400";
else:
$ber=test_input($_POST["ber"]);
endif;
if(empty($_POST["bes"])):
$bes=0;
else:
$bes=test_input($_POST["bes"]);
endif;
endif;
echo $ber." " . $bes. " " . $bequan;
// check if name only contains letters and whitespace
endif;
endif;
endif;
答案 1 :(得分：0)
请使用这个
<!DOCTYPE html>
<?php
session_start();
ob_start();
?>
<html lang="en">
<head>
<title>
Power For Light
</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="bootstrap/css/bootstrap.min.css">
<script type="text/javascript" src="jquery.min.js"></script>
<script type="text/javascript" src="bootstrap/js/bootstrap.min.js"></script>
<style type="text/css">
.colht{
height:200px;
border: 5px solid red;
}
.colht1{
height:100px;
border: 5px solid yellow;
}
.navbar-custom {
background-color:#ffffff;
color:#ffffff;
border-radius:0;
padding:10px;
}
.ht{
height:200px;
}
h2,h3{
text-align: center;
}
sup{
color:red;
}
</style>
</head>
<body onload="document.myForm.reset();">
<?php
$bequanerr = $bechkErr = "";
$bequan = $ber = $bes = $bechk = $berad = "";
$c = 0;
//$_SESSION['postid']=rand(10, 30);
if ($_SERVER["REQUEST_METHOD"] == "POST"):
$berad = $_POST['berad'];
if (!empty($_POST["bechk"])):
$bechk = $_POST["bechk"];
$c++;
if (empty($_POST["bequan"])):
echo "Hello";
$bequanerr = "Please enter a quantity value";
else:
$bequan = test_input($_POST["bequan"]);
if ($bequan <= 0):
$bequanerr = "Please enter a valid quantity value greater than 0";
else:
if (empty($_POST["ber"])):
$ber = 400;
echo "400";
else:
$ber = test_input($_POST["ber"]);
endif;
if (empty($_POST["bes"])):
$bes = 0;
else:
$bes = test_input($_POST["bes"]);
endif;
endif;
echo $ber . " " . $bes . " " . $bequan;
// check if name only contains letters and whitespace
endif;
endif;
endif;
function test_input($data) {
$data = trim($data);
$data = stripslashes($data);
$data = htmlspecialchars($data);
return $data;
}
?>
<nav class="navbar navbar-inverse">
<div class="container">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#myNavbar">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="index.php"><img src="images/powerforlight.jpg" style= "max-height:50px; margin-top:-14px; "/></a>
</div>
<div class="collapse navbar-collapse" id="myNavbar">
<ul class="nav navbar-nav">
<li class="active"><a href="index.php">Home</a></li>
<li class=""><a href="aboutus.php">About Us</a></li>
<li class="">
<a class="" href="vendorcf.php">Vendor Contact Form</a>
</li>
<li class="">
<a class="" href="contactus.php">Contact Us</a>
</li>
</ul>
</div>
</div>
</nav>
<div class="container">
<div class="row">
<form name="myForm" class="form-horizontal " role="form" method="POST" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]); ?>" autocomplete="off">
<div class="panel panel-primary">
<div class="panel-heading text-center">
<h2 class="text-center">Bootstrap Design table</h2>
</div>
<div class="panel-body">
<div class="table-responsive">
<table class="table table-bordered table-hover">
<thead>
<tr>
<th rowspan="2">Household Items</th>
<th colspan="2">Running Wattage
</th>
<th colspan="2">Starting Wattage
</th>
<th rowspan="2">Quantity</th>
<th rowspan="2">Should start Parallely</th>
<th rowspan="2">Should start Serially</th>
</tr>
<tr>
<th>
Typical
</th>
<th> Specific </th>
<th>
Typical
</th>
<th> Specific </th>
</tr>
</thead>
<tbody>
<tr>
<td>
<label class="checkbox-inline"><input type="checkbox" name="bechk" value="be" <?php if (isset($bechk) && $bechk == "be") echo "checked"; ?>>Blanket, Electric
</label>
</td>
<td name="be1">400</td>
<td><input type="number" name="ber" /> </td>
<td name="be2">0</td>
<td><input type="number" name="bes" /> </td>
<td><input type="number" name="bequan" value="<?php echo $bequan; ?>"/>
<p style="color:red"> <?php echo $bequanerr; ?></p></td>
<td><input type="radio" name= "berad" class="rdo" value="P" <?php if (isset($berad) && $berad == "P") echo "checked"; ?> /> </td>
<td><input type="radio" name= "berad" class="rdo" value="S" <?php if (isset($berad) && $berad == "S") echo "checked"; ?> /> </td>
</tr>
</tbody>
</table>
<div class="control-group">
<!-- Button -->
<div class="controls col-xs-offset-3 col-xs-2">
<input type="submit" value="Submit" id="reg">
</div>
</div>
</div>
</div>
</div>
</form>
</div>
</div>
<?php ob_end_flush(); ?>
</body>
</html>
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