[Resolved] implode array variables

[bfuzze_98]

I'm trying to implode array variables from a multiple select form. Since I won't know the user's selections, I can't define the array values explicitly.
Selections are fed into array $sel.
For example: Total selection set = [s1, s2, s3, s4, s5]
but $sel = [s1, s3, s4]
I need to implode $sel.

I tried this:
I tested that the values were being passed correctly by:

echo $sel[0];

Output: s1 //correct
So then I tried:

for ($i=0; $i<=count($sel); $i++)	{
  $out = implode(",", $sel[$i]);
}
echo $out . '<br>';

Output:Warning: implode() [function.implode]: Bad arguments. in /var/www/htdocs/test/ind_dbase/ind_request/test.php on line 8

So then I tried:

foreach($sel as $select)	{
  $out = implode(",", $select);
}
echo $out . '<br>';

Output: same error.

Feed each of the values from $sel into the implode() function without having to manually assign the values.
Thanks in advance.

[bfuzze_98]

I was asking the wrong question, I found the solution (array_push).

$array = array();
for ($i=0; $i<=count($sel); $i++)	{
	$add = array_push($array, $sel[$i]);
}
$out = implode(",", $array);
echo $out . '<br>';

Sorry for the post.

[Drakla]

Just do

$out = implode(',', $sel);
echo $out, '<br>';

You've added a whole lot of shakin' for no reason.

[bfuzze_98]

THANKS!

[bfuzze_98]

Perhaps you can help me with another problem, exploding the array. I checked the manual to do the following:

$rses = explode(",", $ses['res'], -1);
for ($i=0; $i <=count($rses); $i++)	{
  echo $rses[$i];
}

The output was good, ie: bis, mcep, ...
However, when I passed these values into a function (located on an include page, I recieved some strange responses.
This is how I called the function: (test.php)

for ($i=0; $i <=count($rses); $i++)	{
	$r1 = res_selection($rses[$i]);
	$r2 = res_selection($rses[$i]);
	$r3 = res_selection($rses[$i]);
	$r4 = res_selection($rses[$i]);
	$r5 = res_selection($rses[$i]);
	$r6 = res_selection($rses[$i]);
	$r7 = res_selection($rses[$i]);
} 

and this is the function: (myfunc.php)

function res_selection($rses)	{
if ($rses == "bis")	{
	$r1 = "selected";
	return $r1;
}
if ($rses == "cs")	{
	$r2 = "selected";
	return $r2;
}
//and so on ...

If I echo the $rses on the function page (myfunc.php), I get something like: "bis cs cte" which tells me the values of $rses are being passed. Currently, the response I get is $r1="" and $r2="", whereas they both should ="selected". The thing is if I change this:

  if ($rses == "bis")	{

to this:

  if ($rses = "bis")	{

(for all of the 'if's')
Then suddenly all $r values ="selected" regardless of the value of $rses. It doesn't seem to be differentiating between the different string values of $rses. After exploding an array, do the values need to be redefined some how?

[Drakla]

Hmm, I don't know what you're trying to do there - but for each response are you trying to create a variable that matches it? You only want to call the function once per loop. I don't know if this is something like what you're after

for ($i=0; $i <=count($rses); $i++)
{
	${'r' . ($i+1)} = res_selection($rses[$i]);
}

That creates a variable $r1 for entry 0, $r2 for entry 1, etc using variable variables (it's in the manual) But that's probably useless as it's pointless doing that and you might as well keep dealing with arrays.

[bfuzze_98]

Let me try to explain better:
$sel stores a user's selections from a form.

$sel is an array of string values [bis, cs, mcep,...] this array may be composed of between 1 and 7 different string values.
$r1 - $r7 represent/or are associated with those values through the function. If for example $r1 is associated with the string "bis" and "bis" is in the array $sel then $r1="selected". However, if $r2 is associated with "cs", but "cs" is not in $sel, then $r2="not selected" or "".

I tried your suggestion:

$query = mysql_query("SELECT * FROM request1 WHERE id = '$id'") or die(mysql_error());
while ($ses = mysql_fetch_assoc($query))	{
  $rses = explode(",", $ses['res'], -1);
  for ($i=0; $i <=count($rses); $i++)	{
    ${'r'.$i+1} = res_selection($rses[$i]);
} 
}

for ($i=0; $i <=count($rses); $i++)	{
	echo 'r' . $i+1 . '= ' . ${'r'.$i+1};
}

The output I received is: 1= 1= 1= 1= 1=
I don't know why it didn't print the 'r' or why it didn't increment, but more importantly I'm not getting any values back for $r1 thru $r7. I appreciate the assistance. If you have any other ideas...

[Drakla]

Sorry, forgot that precendence of + is wrong so should be ${'r' . ($i+1)}

I'll look at this again tomorrow as I'm v tired now, but hopefully somebody else will have helped by then.

[bfuzze_98]

Here is one more log on the fire. I transferred the function from the include file myfunc.php into the main file, removed the 'returns' and added the '[$i]' to make th following:

while ($ses = mysql_fetch_assoc($query))	{
	$rses = explode(",", $ses['res'], -1);
	for ($i=0; $i <=count($rses); $i++)	{
		if ($rses[$i] == "bis")	{
			$r1 = "selected";
		}
		else if ($rses[$i] == "cs")	{
			$r2 = "selected";
		}
		else if ($rses[$i] == "cte")	{
			$r3 = "selected";
		}
		else if ($rses[$i] == "cbb")	{
			$r4 = "selected";
		}
		else if ($rses[$i] == "mcep")	{
			$r5 = "selected";
		}
		else if ($rses[$i] == "nn")	{
			$r6 = "selected";
		}
		else if ($rses[$i] == "sn")	{
			$r7 = "selected";
		}
	} 
}

Now, the values of $r1 - $r7 are being assigned ("selected" or ""), but when I try to echo the values $r1 - $r7:

for ($i=1; $i <= 7; $i++)	{
	echo 'r' . $i . '= ' . $r[$i] . ", ";
}

It comes up blank or: r1= , r2= , r3= , r4= , r5= , r6= , r7= .??? The only way I know that something is being assigned to the $r variables is that the specified fields in the form are highlighted. For example, if $r1 is associated with "bis" and "bis" is in the array $sel, then $r1 = "selected". Then form field that represents "bis" is highlighted. This is the goal I was going going for initially, but I don't understand why the $r values are not printing out. Thanks for your help today.