making a checkbox sticky

Hi,
I created a form with some checkboxes. When a user checks the box and submits, the form is redisplayed with the results but the check is removed. I have been able to make the text entries stick but not the checkbox after submitting. How would I do this?
thanks.

 

Hey. It's quite simple but involves a little logic:

<?php 

// Coded by Daniel Clarke (DanMakes) 

function checkbox($name,$value) { 
	
	// Get the value of the form and then if it's been checked. 
	if ($_GET[$name] == $value) { 
		// if it has return the HTMl for a checked checkbox.
		return 'checked="checked"'; 
	} 
}

?>

<input name="food" type="checkbox" <?php checkbox("food","ham") ?> id="checkbox" value="ham" />

PHP:

So use that function and then inside of the checkbox code type <?php checkbox("CHECKBOXNAME","CHECKEDVALUE") ?>. Hope that makes sense

 

I use this function:

function checkbox($var){
	if($var)
		return 'checked="checked"';
}

Code (markup):

then i call the funcion on the checkbox:

<input type="checkbox" name="boxName" value="1" <?=checkbox($_POST['boxName'])?> />

Code (markup):

or directly without a function:

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

Code (markup):

 

That works on most checkboxs - but it won't work if any JS is used.

 

Thank You friends

 

Very useful, thanks