sizeof($_POST) is killing me slowly

[Sleidia]

Can someone tell me how I could make the size of the $_POST array always the same whether I use checkboxes or not???

Unselecetd checkboxes don't appear in $_POST and it is breaking all my code.

I assumed that unselected checkboxes would appear as empty values in $_POST the same way textfields do but they don't.

Thanks for helping.

 

[sleipnir214]

I'm not sure what you're asking.

What I do with checkboxes is to use isset(), array_key_exists(), or in_array() to see whether the name of the checkbox exists in $_POST. If it does not, my script assumes that the checkbox was not checked.


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TANSTAAFL!!

 

[kenrbnsn]

How are you specifying the names of the check boxes in your form? If you can show us that, we might be able to suggest a different way of checking for them.

Ken

 

[Sleidia]

Thanks for caring !

My problem is that I absolutely need to loop through all the values of the $_POST array BUT the size of this array MUST always equal the number of form elements independently of the fact that checkboxes can be used or not.

I hope you can understand my urgent need.
Thanks again !

(|)(|)

<=~x~>

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[Sleidia]

Ooops ... I forgot to remove my sig which melted with my post in a very weird way
Too bad we can't edit our posts

 

[Sleidia]

To be more specific, I'd like this :

<?php

if($_POST) {

print(nl2br(print_r($_POST, true)));

} else {

}

echo"
<form method=\"POST\" action=\"test.php\">

<input type=\"checkbox\" name=\"cb_1\" value=\"yes\"><br />
<input type=\"checkbox\" name=\"cb_2\" value=\"yes\"><br />
<input type=\"checkbox\" name=\"cb_3\" value=\"yes\"><br />
<input type=\"checkbox\" name=\"cb_4\" value=\"yes\"><br />
<input type=\"submit\" value=\" SUBMIT \">
</form>
";

?>

... to output this :

Array
(
[cb_1] =>
[cb_2] =>
[cb_3] =>
[cb_4] =>
)

... instead of nothing when elements aren't checked.

 

[kenrbnsn]

Here's one way of getting the results you're looking for.

<?php
$tmp = array();
$tmp[] = '<form method="POST" action="' . $_SERVER['PHP_SELF'] .'">';
for ($i=0;$i<4;$i++) {
        $x= '<input [COLOR=red]type="hidden"[/color] name="cb[' . $i . ']" value="no">';
        $x .= 'Test ' . $i .'<input type="checkbox" name="cb[' . $i . ']" value="yes">';
        $tmp[] = $x; }
$tmp[] = '<input type="submit" value="Send Form" name="submit">';
$tmp[] = '</form>';
echo implode("<br />\n",$tmp)."<br />\n";
if(isset($_POST['submit'])) {echo '<pre>';print_r($_POST);echo '</pre>';}
?>

It uses the "type=hidden" form field to initialize the variables to the unchecked value, then if you check any of the boxes, the corresponding checked value is returned.

I changed the names you used from individual names to an array, since arrays are easier to manipulate in PHP.

I have tested the code and it works. (PHP 4.3.2)

Ken