PHP keep checkbox checked after submitting form

Question

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.?

Yogesh Suthar · Accepted Answer · 2012-09-22 06:47:39Z

27

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..

answered Sep 22, 2012 at 6:47

Yogesh Suthar

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3 Comments

Lewis Over a year ago

What if the checkbox is within an array? name="txtCheck[]"

GeoGyro Over a year ago

<?php if (in_array("your_value", $_POST['txtCheck'])) echo "checked='checked'"; ?>

dragonn Over a year ago

thanks what happens if i do not want to keep all of them selected in the array. only the one that were selected

smottt · Accepted Answer · 2012-09-22 06:44:42Z

1

If the submitted value is not empty, then add the checked="checked" attribute to the checkbox:

<input type="checkbox" name="txtCheck" value="1" <?php if (!empty($_POST['txtCheck'])): ?> checked="checked"<?php endif; ?> />

You can however leave the value attribute intact.

answered Sep 22, 2012 at 6:44

smottt

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Comments

Sibu · Accepted Answer · 2012-09-22 06:46:29Z

0

<input type="checkbox" name="txtCheck" <?php if($_POST['txtCheck']>0){ ?>checked="checked" <? }?> />

answered Sep 22, 2012 at 6:46

Sibu

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Comments

Jeremy J Starcher · Accepted Answer · 2012-09-22 06:46:38Z

0

Try this:

$checked = "";
if ($_POST['txtCheck']) {
  $checked = "checked";
  // May need to be "checked='checked'" for xhtml
}
<input type="checkbox" name="txtCheck" <?php echo $checked;?>  /><br />

answered Sep 22, 2012 at 6:46

Jeremy J Starcher

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Comments

Mohsin Shoukat · Accepted Answer · 2018-10-16 09:44:09Z

0

By apply ternary condition in checkbox tag field we can set whether this is checked or not on form submission

<input type="checkbox" value="1" name="nofollow" <?=isset($_POST['nofollow'])?"checked":''; ?> >

answered Oct 16, 2018 at 9:44

Mohsin Shoukat

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