php for loop doesn't work

Question

I have this php script:

<?php
$tmp = $_POST['N1']; 
$tmp = $_POST['N2'];
$tmp = $_POST['N3']; 
$tmp = $_POST['N4']; 
?>

I want to use a for loop instead:

<?php

for ($i = 0; $i < 4; $i++) { 
$tmp = $_POST['N$i']; 
}
?>

How come this doesn't work?

https://secure.php.net/manual/en/language.variables.variable.php — aynber, Mar 30 '18 at 15:58
@aynber I don't think that's the right choice. Simply `$_POST["N$i"]` should do it. — Aniket Sahrawat, Mar 30 '18 at 15:59
i've rolled back the question to where it was asking about PHP, to match the comments, answers, duplicate flag, etc. — drudge, Apr 14 '18 at 00:20

score 0 · Accepted Answer · edited Mar 30 '18 at 16:32

0

in php strings in ' are parsed as plain text not a variable

use your syntax like this:

<?php

for ($i = 0; $i < 4; $i++) { 
$tmp = $_POST["N$i"]; 
}
?>

for a better code structure use foreach in this case...

edited Mar 30 '18 at 16:32

roozgar

answered Mar 30 '18 at 16:29

peiman F.

1 Answers1