Question

做了一些谷歌搜索后，我仍然感到困惑...... 我试图通过隐藏字段将计数的单选按钮值（Javascript）传递给PHP，稍后将插入数据库MySQL。我有一个名为test.html的表单

<html>
<head><script type="text/javascript" src="../js/script.js"></script</head>
<body>
<form name="myform" method="post"
 onSubmit="return validateRadio()" action="">

<table class="tftable" border="1">
<tr><th><div align="center" class="tftable th">Questions</div></th><th colspan="2"><div align="center">Answer</div></th>
</tr>
<tr>
  <td>I like to dance</td>
  <td>
  <label></label>
  <label>
  <input name="bm1" type="radio" value="1" />
  Yes</label>
</td>
<td>
<label></label>
<label>
<input name="bm1" type="radio" value="2" />
No
</label>
</td></table>
<input type="hidden" name="passvalue" id="passvalue" value="">
</form>
</body>
</html>

这是计算单选按钮的script.js ...我要传递的值是answeramount值

function validateRadio()
{
// get all the inputs type
var inputs = myform.elements;
var radios = [];

// find the radio type
for (var i = 0; i < inputs.length; ++i) {
if (inputs[i].type == 'radio') {
radios.push(inputs[i]);
}
}
var countChecked = 0;
for (var j = 0; j < radios.length; j++) {
if (radios[j].checked) {
countChecked++;
}
}
//count number of radio button with value=1
var answeramount = 0;
for (var k = 0; k < radios.length; k++){
if(radios[k].checked && radios[k].value==1){
answeramount++;
}
}
if (countChecked != radios.length / 2){
alert("All questions must be answered.");
return false; // abort submit
} else {
alert("All questions have been answered.");
return true; // proceed to submit
} 
}

请告诉我如何将“answeramount”值传递给php，稍后将插入数据库。感谢

编辑：

这是jsFiddle

Answer 1

您可以使用该简单代码来操纵输入的值：

var field = document.getElementById('#passvalue');
field.value = answeramount;

将此剪切放在计数和警报之间

php方面将是sql脚本的标准POST（有几个教程）您隐藏的输入将是$ _POST [＆＃39; passvalue＆＃39;]

Answer 2

更正您的HTML：阅读评论！

并在您的函数中添加

...
else {
    alert("All questions have been answered.");
    document.getElementById("passvalue").value = answeramount;
    return true; // proceed to submit
}
...

在PHP中，您可以从 $ _ POST [＆＃39; passvalue＆＃39; ]

<?php $passvalue = ( isset( $_POST[ 'passvalue' ] ) ? (int)$_POST[ 'passvalue' ] : 0 ); ?>

更新：更易读的代码：

<?php // check: if the index "passavlue" is set // equivalent to ternary operator [ expression ? <give true> : <give false> ] if( isset( $_POST[ 'passvalue' ] ) ){ // cast the string to integer $passvalue = (int) $_POST[ 'passvalue' ]; } else{ $passvalue = 0; } ?>

Answer 3

$ passvalue = isset（$ _ POST [ 'passvalue']）$ _ POST [ 'passvalue']：？ “”;

passvalue字段应该

input type =“hidden”name =“passvalue”id =“passvalue”value =“echo $ passvalue;”

并在javascript

警告（“所有问题都已得到解答。”）; document.getElementsById（'passvalue'）。Value = answeramount;

将值从javascript传递给PHP（使用隐藏字段）

3 个答案: