Using $_POST in cycle

[eburlea]

Hello, all. Please advise how to use $_POST in cycle. I have the following code:

1. <?php
2. if (isset($_POST['id1'])) {$id1 = $_POST['id1']}
3. if (isset($_POST['id2'])) {$id2 = $_POST['id2']}
4. if (isset($_POST['id3'])) {$id3 = $_POST['id3']}
5. ?>

I have tried:

1. <?php
2. for ($x=1, $x<=3, $x++)
3. {
4. if (isset($_POST['id".$x."'])) {$id".$x." = $_POST['id".$x."'];}
5. }
6. ?>

...but it doesn't work. :(

[Biiim]

The problem i see is here $id".$x." = $_POST['id".$x."'];

you can't concat a string onto a variable name, you should use an array for that eg.

<?php
$ids = array();
for ($x=1; $x<=3; $x++){
    if (isset($_POST['id'.$x])) {
        $ids[] = $_POST['id'.$x];
    }
}
var_dump($ids);
?>

When you concat you need to make sure you use the same quote the string was started with, when it starts with a single quote it needs to close with another single quote - a double quote will just be put in the string literally and vice versa when it is opened with a double quote and you type a single quote inside it.

You could do something like this below for any number of id fields:

$ids = array();
foreach($_POST as $k=>$v){
    if(substr($k,0,2) == 'id'){
        $ids[] = $v;
    }
}

foreach($ids as $v){
    echo $v."<br/>\r\n";
}

[pritaeas]

Within the loop:

$var = 'id' . $x;
$$var = isset($_POST[$var]) ? $_POST[$var] : '';