PHP Auto-Check checkbox not working

Question

I have an automatic check system that is not working properly

while($linha = mysql_fetch_array($tabela))
{
    $nome = $linha['TABLE_NAME'];

    ?>

        <input type="checkbox" name="<?php echo $nome ?>" id="<?php echo $nome ?>" value="<?php echo $nome ?>" <?php if(isset($_POST[$nome]))  echo "checked='checked'";?>/> <?php echo $nome ?><br />

    <?php
}

The problem is the $nome variable, it have spaces, like 'A B' or '106 South', doing the system not works correctly... I don't know how to solve it, any help will be welcome!

var_dump($nome) returned it > string(7) "106 Sul" – Iago Coutinho Campos Oct 21 '14 at 18:48 — Iago Coutinho Campos, Oct 21 '14 at 18:48

score 2 · Accepted Answer · edited May 23 '17 at 10:33

The problem lies with the fact that you're using spaces in the name attribute of the input tag. See this reference:

ID and NAME tokens must begin with a letter ([A-Za-z]) and may be followed by any number of letters, digits ([0-9]), hyphens ("-"), underscores ("_"), colons (":"), and periods (".").

This has also been addressed in other SO questions

Spaces are not allowed and will not work properly when you submit them using either POST or GET methods. You should therefore rename any values with spaces or use a str_replace function to substitute the spaces with underscores or something similar. Also note the part that said "must begin with a letter"... this also means that a value of 106 Sul is invalid even if you changed it to 106Sul.

score 0 · Answer 2 · answered Oct 21 '14 at 18:40

0

if the space is the problem, cant you just replace it with another character, like this:

str_replace(' ','|',$nome);

Then when reading the results, you just replace the | with the space and save it to the DB

answered Oct 21 '14 at 18:40

Dennis van Schaik

464
5
19

Thank you my friend, first time I see this function – Iago Coutinho Campos Oct 21 '14 at 21:45

score -1 · Answer 3 · answered Oct 21 '14 at 18:47

-1

You can check an input only with the "checked" value in the tag:

<input type="checkbox" checked />

Try to write the word instead of "checked='checked'" in your html from php.

answered Oct 21 '14 at 18:47

Alex

715
5
14

-1 because `checked="checked"` is still valid HTML markup even though it is not common for HTML5, it is alive and kicking for XHTML standards. It will work in any modern browser either way. – sjagr Oct 21 '14 at 18:57
I didn't mention you can't use it. – Alex Oct 21 '14 at 19:22
However it won't solve the problem, and thus isn't an answer but should rather be a comment. – sjagr Oct 21 '14 at 19:27

PHP Auto-Check checkbox not working

3 Answers3