我在顶部提供了预标记，这样当我点击ragister按钮时，我可以看到值的变化，除了爱好之外，所有值都是正确的，因为它给出了"on"为什么这样，请告诉我，我是php的新手，请尽可能详细地解释我。
<?php
$error_array = array();
$fname = $lname = $email = $dob = $Mchecked = $Fchecked = $hobbies ="";
if(isset($_POST["sbt_save"]))
{
echo '<pre>'; print_r($_POST); echo "</pre>";
if($_POST['fname']=="")
{
$err ="Please Enter your first name"."<br>";
array_push($error_array,$err);
}
else
{
$fname = test_input($_POST['fname']);
}
if($_POST['lname']=="")
{
$err ="Please Enter your last name"."<br>";
array_push($error_array,$err);
}
else
{
$lname = test_input($_POST["lname"]);
}
if($_POST['email']=="")
{
$err ="Please Enter your email"."<br>";
array_push($error_array,$err);
}
else
{
$email = test_input($_POST["email"]);
}
if($_POST['dob']=="")
{
$err ="Please Enter your date of birth"."<br>";
array_push($error_array,$err);
}
else
{
$dob = test_input($_POST["dob"]);
}
if(!isset($_POST["gender"]))
{
$err ="Please select gender"."<br>";
array_push($error_array,$err);
}
else
{
$gender = $_POST["gender"];
if ($gender == "Male")
{
$Mchecked = "checked";
}
else if ($gender == "Female")
{
$Fchecked = "checked";
}
}
if(!isset($_POST['hobbies']))
{
$err ="Please Enter your hobbies"."<br>";
array_push($error_array,$err);
}
else
{
$hobbies = test_input($_POST['hobbies']);
}
}
function test_input($data)
{
$data = trim($data);
$data = stripslashes($data);
$data = htmlspecialchars($data);
return $data;
}
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Ragistration Form</title>
<link rel="stylesheet" type="text/css" href="ragistration_form.css">
<script src="jquery-2.2.1.min.js"></script>
<script>
/*
$(document).ready(function(event)
{
$(".sbt_button").click(function(event)
{
var error_arr = [];
var email_value = $("#email").val();
var position_of_at = email_value.indexOf('@');
var position_of_dot = email_value.lastIndexOf('.');
if($("#fname").val() == null || $("#fname").val() == "")
{
var err = "First Name";
error_arr.push(err);
}
if($("#lname").val() == null || $("#lname").val() == "")
{
var err = "Last Name ";
error_arr.push(err);
}
if(position_of_at == -1 || position_of_dot == -1 || (position_of_at + 2) >= position_of_dot )
{
var err = "Email ";
error_arr.push(err);
}
if($("#dob").val() == null || $("#dob").val() == "")
{
var err = "Date of Birth ";
error_arr.push(err);
}
if(!$("input[type='radio']").is(":checked"))
{
var err = "Gender ";
error_arr.push(err);
}
if(!$("input[type='checkbox']").is(":checked"))
{
var err = "Hobbies ";
error_arr.push(err);
}
if(error_arr.length !=0)
{
event.preventDefault();
alert(error_arr);
}
});
});
*/
</script>
</head>
<body>
<form class="form" name="myForm" action="" method="post">
<table>
<tr>
<p class="heading">Ragistration Form</p>
</tr>
<?php
if($error_array !="")
{
foreach($error_array as $value)
{
echo "<tr><td> ". $value. "</td></tr>";
}
}
?>
<tr>
<td class="field_Name">First Name :<b style="color:red">*</b></td>
<td><input type="text" name="fname" id="fname" class="inputfield_Name" /></td>
</tr>
<tr>
<td class="field_Name">Last Name :<b style="color:red">*</b></td>
<td><input type="text" name="lname" id="lname" class="inputfield_Name" /></td>
</tr>
<tr>
<td class="field_Name">Email :<b style="color:red">*</b></td>
<td><input type="text" name="email" id="email" class="inputfield_Name" /></td>
</tr>
<tr>
<td class="field_Name">Date of Birth :<b style="color:red">*</b></td>
<td><input type="date" name="dob" id="dob" class="inputfield_Name" /></td>
</tr>
<tr>
<td class="field_Name">Gender :<b style="color:red">*</b></td>
<td><input type="radio" name="gender" value="Male"class="inputfield_Name" <?php echo $Mchecked;?>/>Male
<input type="radio" name="gender" value="Female" <?php echo $Fchecked;?> />Female</td>
</tr>
<tr>
<td class="field_Name">About Yourself :</td>
<td><textarea name="abt" class="inputfield_Name"$></textarea></td>
</tr>
<tr>
<td class="field_Name">Hobbies :<b style="color:red">*</b></td>
<td><input name="hobbies" type="checkbox" id="hobbies" class="inputfield_Name" />Cricket
<input name="hobbies" type="checkbox" />Singing
<input name="hobbies" type="checkbox" />Travling</td>
<tr>
<td></td>
<td>
<input name="hobbies" type="checkbox" class="inputfield_Name"/>Writing
<input name="hobbies" type="checkbox" />Teaching
<input name="hobbies" type="checkbox" />Driving
</td>
</tr>
<tr>
<td>
</td>
<td><input type="submit" value="Ragister" name="sbt_save" class="sbt_button"/></td>
</td>
</tr>
</table>
</form>
</body>
</html>
您需要向复选框元素添加值属性：
<tr>
<td class="field_Name">Hobbies :<b style="color:red">*</b></td>
<td><input name="hobbies" value="cricket" type="checkbox" id="hobbies" class="inputfield_Name" />Cricket
<input name="hobbies" value="singing" type="checkbox" />Singing
<input name="hobbies" value="travelling" type="checkbox" />Travling</td>
<tr>
<td></td>
<td>
<input name="hobbies" value="writing" type="checkbox" class="inputfield_Name"/>Writing
<input name="hobbies" value="teaching" type="checkbox" />Teaching
<input name="hobbies" value="driving" type="checkbox" />Driving
</td>
</tr>