Correct syntax for loop/variable names

[golden14]

I have many variables (about 50) coming into PHP from Flash, and I wanted to optimize my PHP code using a loop, but I can't seem to get the correct syntax.  Here is the working code I have so far (using just 3 as an example):

 

<?php

$tName1=$_POST['tName1'];
$tName2=$_POST['tName2'];
$tName3=$_POST['tName3'];

echo "tName1=".$tName1;
echo "tName2=".$tName2;
echo "tName3=".$tName3;
?> 

 

And I would like to do that in a loop.  Here's my incorrect attempt at that:

 

<?php

for ($i=1; $i<4; $i++) {

$tName[$i]=$_POST['tName[$i]'];
echo "tName$i"=.$tName$i;
}
?>

 

Any suggestions/help would be much appreciated, thanks!

[BlueSkyIS]

<?php
for ($i=1; $i<4; $i++) {
     ${'tName'.$i}=$_POST['tName'.$i];
      echo "tName$i = ".${'tName'.$i};
}
?>

[Naez]

Variable variables, introduced in PHP5 I do believe

 

<?php
for ($i=1; $i<4; $i++) {
$tName = "tName" . $i;

$tName = $_GET[$tName];
echo "tName" . $i . "=" . $tName . "<br />";
}
?>

 

I used GET for when I tested (you can change that)

 

I accessed it from http://localhost/PHP/test.php?tName1=testing1&tName2=lalalalal&tName3=test3

 

my output was

tName1=testing1
tName2=lalalalal
tName3=test3

 

 

Hope this was useful!!

[BlueSkyIS]

^ that's okay if you don't need those variables later. but if you need them later use my version.

[golden14]

Thank you both for the help.  The first bit of code didn't seem to work, so I tried the second way (changing GET to POST), and that worked well.  You mention that doing it the second way won't allow me to access the variables later on, but since I POST instead of GET.  Was that different in not allowing me to access them again later?

 

Thanks again for the help.

[BlueSkyIS]

what's different in the second one is that the variable $tName is used over and over. after the loop, it is set to the last value but you won't have any before the last one. my version is working fine here:

 

<?php
// set these for testing
$_POST['tName1'] = "var1";
$_POST['tName2'] = "var2";
$_POST['tName3'] = "var3";

for ($i=1; $i<4; $i++) {
     ${'tName'.$i}=$_POST['tName'.$i];
      echo "tName$i = ".${'tName'.$i}."<BR>";
}
?>
[code]

output:
tName1 = var1
tName2 = var2
tName3 = var3

[/code]

[Naez]

in my example, you can't access $tname1,$tname3, $tname3, etc from outside of the loop (because theoretically it does not exist).

 

 

Also BlueSkyIS's script runs fine on my server.  I haven't played around a whole lot in variable variables but his example is great.

[golden14]

Thanks for that explanation, that makes sense (too much sense now that I think about it).

 

I had to make a few small changes, because due to the nature of how it comes back into the various text fields in flash, I had to use an "&" to split it up instead of the "<BR>".

 

So here's the code now, and this does work correctly.  Thanks for the help and taking the time to explain things, I really appreciate it.

 

<?php
for ($i=1; $i<4; $i++) {
${'tName'.$i}=$_POST['tName'.$i];

if($i>1){
echo "&tName".$i. "=".${'tName'.$i};
}
else echo "tName".$i. "=".${'tName'.$i};
}

?>