提交表单后，PHP会保留复选框 [英] PHP keep checkbox checked after submitting form
本文介绍了提交表单后，PHP会保留复选框的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
<！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-Typecontent =text / html; charset = utf-8/>
< title>无标题文档< / title>
< / head>
< body>
< form action =name =frmSubmitmethod =post>
< input type =checkboxname =txtCheckvalue =<？php echo $ _POST ['txtCheck'];？> />< br />
< label>名称< / label>< br />
< input type =textname =txtNameid =NameTextBoxvalue =<？php echo $ _POST ['txtName'];？> />
< br />
< label> E Mail< / label>< br />
< input type =textname =txtEmailid =EmailTextBoxvalue =<？php echo $ _POST ['txtEmail'];？> />
< input name =BtnSubmittype =submitonclick =MM_validateForm（'NameTextBox'，''，'R'，'EmailTextBox'，''，'R'）; return document.MM_returnValue value =发送/>
< / form>
< / body>
< / html>
如何在提交表单后保留复选框？
解决方案
更改
< input type =checkboxname = txtCheckvalue =<？php echo $ _POST ['txtCheck'];？> />< br />
至
< input type =checkboxname =txtCheckvalue =your value<？php if（isset（$ _ POST ['txtCheck']））echochecked ='checked'; ？> />< br />
这将保持复选框被选中。
Hi all i have a contact form and captcha is there. i want keep the check is checked after submitting the form. I posted the textbox values and it showing correctly but checkbox is not working. here is my code.
<!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>Untitled Document</title>
</head>
<body>
<form action = "" name="frmSubmit" method="post">
<input type="checkbox" name="txtCheck" value="<?php echo $_POST['txtCheck'];?>" /><br />
<label>Name</label><br />
<input type="text" name="txtName" id="NameTextBox" value="<?php echo $_POST['txtName']; ?>" />
<br />
<label>E Mail</label><br />
<input type="text" name="txtEmail" id="EmailTextBox" value="<?php echo $_POST['txtEmail'];?>" />
<input name="BtnSubmit" type="submit" onclick="MM_validateForm('NameTextBox','','R','EmailTextBox','','R');return document.MM_returnValue" value="Send" />
</form>
</body>
</html>
How to keep check box after submitting the form.?
解决方案
change
<input type="checkbox" name="txtCheck" value="<?php echo $_POST['txtCheck'];?>" /><br />
to
<input type="checkbox" name="txtCheck" value="your value" <?php if(isset($_POST['txtCheck'])) echo "checked='checked'"; ?> /><br />
this will keep checkbox checked..
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