need to extract certain values from array

[AikenDrum]

Hi There,

 

relatively new to php so please bear with me -

 

When I post some data to the second page - I get the following output form $_POST:

 

Array

(

    [market] => 44

    [question568] => 2

    [question572] => 1

    [question569] => 5

 

)

 

I need to be able to parse only the questions (no idea how questions many in advance) and create a string like this :

 

568=2&572=1&569=5

 

Amy help would be greatly appreciated

 

Many kind thanks in advance

 

AikenD

[trq]

$out = '';
foreach ($array as $k => $v) {
    if (substr($k,7) == 'question') {
        $out .= "$k=$v";
    }
}
echo $out;

[Mchl]

Adding & in the mix:

 

$out = '';
foreach ($array as $k => $v) {
    if (substr($k,7) == 'question') {
        $out .= "$k=$v&";
    }
}
$out = substr(0,-1);
echo $out;

[AikenDrum]

Hi there -

 

many thanks for the very fast response -

 

this code returns a 0

 

$out = '';
foreach ($_POST as $k => $v) {
    if (substr($k,7) == 'question') {
        $out .= "$k=$v&";
    }
}
$out = substr(0,-1);
echo $out;

 

I changed the 7 to 8 but that did not make a difference either ?

 

Kindest

 

Aiken

[Mchl]

My fault

 

$out = '';
foreach ($_POST as $k => $v) {
    if (substr($k,7) == 'question') {
        $out .= "$k=$v&";
    }
}
$out = substr($out, 0,-1);
echo $out;

 

 

[AikenDrum]

Hi there,

 

I am still getting no response back - not even a zero now :-(

 

I again tried replacing 7 with 8 (I think that's correct)

 

$out just comes back empty

[Mchl]

Try this. Should work now.

$out = '';
foreach ($_POST as $k => $v) {
    if (substr($k,0, == 'question') {
        $out .= "$k=$v&";
    }
}
$out = substr($out, 0,-1);
echo $out;

[AikenDrum]

Bingo - many thanks indeed - I had my own version worked out - but this is better -

 

AikenD