I have an array like this:
[participants] => Array
(
[0] => 9
[1] => 8
[2] => 12
)
I want to put it in another variable to look like this:
"9,8,12"
I tried with the code below but it does not output anything:
$mem = "";
for($i = 0; $i < count($participants); $i++)
{
$mem.$participants[$i];
}
echo $mem;
What can be the problem?
The easiest way would be to use implode:
implode(',', $participants);
In your code you should have used concatenation like this:
$mem .= $participants[$i].',';
However, I would have preferred foreach like this:
$mem = "";
foreach ($participants as $key => $value){
$mem .= $value.',';
}
If you're looping in that way, you have to get rid of the last comma when you're done:
$mem = rtrim($mem, ',');
Use PHP's implode function:
$s = implode(",", $participants);
The reason that your code doesn't work, is because you never do anything to $mem. To append strings to a string, use the .= operator:
$mem .= $participants[$i];
You'll see it will just glue everything together, without commas.
to fix your code. your not assigning the result to anything
$mem = $mem. "," .$participants[$i];
or
$mem .= "," . $participants[$i];
but implode is a better solution
also your looping method would require you to remove the comma at the start (or end)
Your code should be:
$mem = "";
for($i = 0; $i < count($participants); $i++)
{
$mem .= ($i > 0) ? ",".$participants[$i] : $participants[$i];
}
echo $mem;
but as the others said, use PHP implode()
$mem.$participants[$i];, but why bother when you can useimplode().$memyou have to do the=sign first. So$mem .= $participants[$i];. To put comas in between you can do$mem .= ($i > 0) ? ','.$participants[$i] : $participants[$i];but you can use theimplode()function to do this for you as the others indicated.