我很好奇我如何通过一种方式来检测用户从表单选项中选择的内容。根据它们的选择,将改变输入字段文本的处理方式。
期望效果:
选项 A :接受文字,因此立即处理,
选项 B :在继续表单处理之前接受要验证的电子邮件。
选项 C :接受电子邮件,以便在继续表单处理之前验证其电子邮件。
最后,所有三个选项都附加到文本文件中。到目前为止,我只能用它来验证电子邮件。
提前致谢。
HTML表单:
<form method="post" class="subscription-form form-inline" id="subscribe" role="form">
<h4 class="subscription-success"><i class="icon_check"></i> Thank you for requesting... </h4>
<h4 class="subscription-error">Something Wrong!</h4>
<select id="iam" name="usertype" class="form-control input-box">
<option data-placeholder = "Enter A username" selected value="A">Enter A account username</option>
<option data-placeholder = "enter B email" value="B"> Enter B email </option>
<option data-placeholder = "enter C email" value="C"> Enter C email </option>
</select>
<input type="email" name="email" id="subscriber-email" placeholder="Your Email" class="form-control input-box">
<button type="submit" name="submit" id="subscribe-button" class="btn btn-default standard-button">Submit</button>
</form>
JS - 到目前为止只检测选择和更改占位符文本:
$('#iam').on('change', function() {
var placeholder = $(this).find(':selected').data('placeholder');
$('#subscriber-email').attr('placeholder', placeholder);
});
PHP - 到目前为止只验证电子邮件并将结果附加到文件:
<?php
// Note: filter_var() requires PHP >= 5.2.0
if ( isset($_POST['email']) && filter_var($_POST['email'], FILTER_VALIDATE_EMAIL) ) {
$selected_val = $_POST['usertype']; // Storing Selected Value In Variable
$e_mail = $_POST['email'] . " - is a - " . $selected_val . " ," . "\n";
file_put_contents('email-list.txt', $e_mail, FILE_APPEND | LOCK_EX);
}
?>
答案 0 :(得分:0)
如果你想在php中验证它,你需要做的就是将选项值设置为你要验证的类型而不是x,y并相应地处理它。如果您需要这些值(x和y),您可以将值设置为x,email和y等格式;电子邮件,在php中拆分并获取原始值和验证器方法。
如果您希望在javascript中这样做,它会变得有点棘手。这应该有助于您开始根据所选选项设置类型。正确的名称和ID由您自己决定。
<html>
<head>
<Script>
function createInputField(e){
var tS = (e || document.getElementById('inputFieldSelector')); //The type list
var tC = document.getElementById('inputFieldContainer'); //The field container we append our input to
if (tS && tC){
while (tC.firstChild) tC.removeChild(tC.firstChild); //Empty the container
var tO = tS.options[tS.selectedIndex]; //Selected option
var tE = document.createElement('input'); //The dynamic input field
tE.id = 'inputField';
tE.type = (tO.getAttribute('data-type') || 'text');
tE.placeholder = tO.getAttribute('data-placeholder');
tC.appendChild(tE);
}
}
function validateInputField(){
var tE = document.getElementById('inputField');
if (tE){
if (tE.type == 'number' && (tE.value.trim() === '' || isNaN(tE.value))){
alert('This is no number..');
return false;
}
else if (tE.type == 'email' && tE.value.indexOf('@') === -1){
alert('What email is that?');
return false;
}
}
return true
}
</Script>
</head>
<body onload = 'createInputField()'>
<form onsubmit = 'return validateInputField()'>
<select id = 'inputFieldSelector' onchange = 'createInputField(this)'>
<option data-placeholder = 'Enter Text' data-type = 'text' value = 'Influencer'>Today I want text</option>
<option data-placeholder = 'Enter EMail' data-type = 'email' value = 'B'>I feel like entering an email</option>
<option data-placeholder = 'Enter Number' data-type = 'number' value = 'C'>How about a number?</option>
</select>
<div id = 'inputFieldContainer'>
<!--In here we are going to create the input field according to the selection.-->
</div>
<button type = 'submit'>Submit</button>
</form>
</body>
</html>
答案 1 :(得分:0)
由于我对JS和PHP的新手理解很少,我创建了3个输入字段 - 名称/用户名/电子邮件。对于类型A,需要提交名称和用户名组合。适用于B型和B型C我需要提交名称和电子邮件组合。因此,当从选项和提交的可见字段中选择类型A时,我会隐藏电子邮件字段。当选择类型B或C时,我隐藏了用户名字段,并保持名称和电子邮件字段可见并提交其内容。