I'm returning an array from my DB with something like 0,0,1,0 which would be chosen products in this case. With that I'm checking if I should mark an element as selected.
$p gets the array with the product group. Then for a series of elements I use something like this.
<input <?= $p[0]=='1'?'checked':'';?> value="Product 1" />
<input <?= $p[1]=='1'?'checked':'';?> value="Product 2" />
<input <?= $p[2]=='1'?'checked':'';?> value="Product 3" />
<input <?= $p[3]=='1'?'checked':'';?> value="Product 4" />
But sometimes no choice has been made at all, which would return an empty array, which in turn triggers php errors like Uninitialized string offset: 3
What would be a good way to handle empty arrays while keeping the markup rather tidy? Separate functions or so?
UPDATE
Updated solution, which with 4 radios results in the first three of them checked.
<?php $p=check(1); ?>
<input type="radio" <?= !empty($p[0])?'checked':'';?>>
<input type="radio" <?= !empty($p[1])?'checked':'';?>>
<input type="radio" <?= !empty($p[2])?'checked':'';?>>
<input type="radio" <?= !empty($p[3])?'checked':'';?>>
> And the sql query result might not even be an empty array. I guess if the query doesn't result in anything, not even an empty array is set as a result?