Combining form textfield values using php implode

I have 3 text fields and I want to pass the values after combining them usin开发者_如何学Cg a hyphen.

<input type="text" name="val[]" />
<input type="text" name="val[]" />
<input type="text" name="val[]" />

Preferably help me with php implode option.

How do i retrieve it after submit ?

Thanks.

After sending the form, your values will be in $_POST['val'] or $_GET['val'] as an array, depending on the method of your form.

You can combine them simply by:

$hyphenated = implode("-", $_POST['val']); // or $_GET['val']

thanks. how do i change focus to next field once a field has max values:

See if this works:

<input type="text" name="val[]" onkeyup='checkVals("field1", "field2");' id='field1'>
<input type="text" name="val[]" onkeyup='checkVals("field2", "field3");' id='field2'>
<input type="text" name="val[]" id='field3'>

<script>
function checkVals(this_field, next_field){
var fieldval = document.getElementById(this_field).value;
var fieldlen = fieldval.length;

 if(fieldlen > 10){ // you can change 10 to something else
 document.getElementById(next_field).focus();
 document.getElementById(next_field).select();
 }
}
</script>