Check boxes

[m_henry]

I have a form which allows a user to check off a number of selections. When I pass the form to the next script I want to know which checkboxes were selected. Using the following code is not working, any ideas?

for($i=1; $i<=$num_elements; $i++)
{
if(isset($chk.$i))
{
echo "$i is set.<BR>\n";
unset($chk.$i);
}
}

Thanks for any help you can offer.

[Anon]

try the following and see whether it helps you.

for($i=1; $i<=$num_elements; $i++)
{
if(isset(${"chk".$i}))
{
echo "$i is set.<BR>\n";
unset(${"chk".$i});
}
}

[m_henry]

Worked like a charm! Can you explain to me the premise behind your syntax? Where can I read about this syntax? if(isset(${"chk".$i})) ...is not familiar to me. What does the curly {} do exactly?

Thanks for the code and any explainations you can offer.

[Anon]

Read this ....

http://www.php.net/manual/pt_BR/language.variables.variable.php