Build comma separated string in PHP Loop

Question

Hello Guys i need to do this,

I have a common loop

foreach ($stuffs as $stuff) {
echo $stuff;
}

Lets assume $stuff is an 'id' of a mysql table what i have and i dont want to be showed in next results, so i want to build a string like this

1,23,54,67 (comma separated)

So that string will be in mysql query to exclude results that already have been shown. how can i do that?

Should be with implode? How can i achieve that?

Possible duplicate of [How to create comma separated list from array in PHP?](https://stackoverflow.com/questions/2435216/how-to-create-comma-separated-list-from-array-in-php) — mickmackusa, Feb 19 '18 at 13:26

score 19 · Accepted Answer · answered Sep 09 '13 at 14:56

19

implode should be the tool:

implode(",", $stuffs);

will return a comma separated list.

$myarray=array(1,2,"hello",4,5);
echo implode(",", $myarray);

returns

1,2,hello,4,5

answered Sep 09 '13 at 14:56

fedorqui

+1 cannot see what's wrong with this (ps. well, you could use ' instead of ", which in theory would be faster) – mvds Sep 09 '13 at 14:57
3

this makes an assumption that $stuffs is already an array, whereas it doesnt have to be that way. It can be something else that is iterable – Gadoma Sep 09 '13 at 14:59
1

@Gadoma - though if $stuffs wasn't an array, OP should have indicated that in their question – Mark Baker Sep 09 '13 at 15:01
Ops new solution tryin here folks leme check – Paulo José Oliveira Rosa Sep 09 '13 at 15:03
@MarkBaker true, true :) – Gadoma Sep 09 '13 at 15:06

score 4 · Answer 2 · edited Aug 29 '15 at 18:42

4

If you really wanna have the loop:

$values = "";

foreach ($stuffs as $stuff) {
    $values != "" && $values .= ",";
    $values .= $stuff;
 }

echo $values;

I suggest using implode, but the loop can really give you more power if you wanna do some further stuff.

edited Aug 29 '15 at 18:42

mixel

answered Sep 09 '13 at 15:02

Hosea Kambonde

`Well if you really wanna have the loop` - why would you wanna have the loop in the first place? It's not necessary here. A simple `implode()` would do the job ;) – Amal Murali Sep 09 '13 at 15:05
Like I said, just gives you more control – Hosea Kambonde Sep 09 '13 at 15:07

score 3 · Answer 3 · answered Dec 02 '17 at 16:35

3

This worked in my case (detects if isn't the loop last iteration):

foreach($array as $key => $val){
    ...
    if($key!==count($array)-1){echo ',';}
}

answered Dec 02 '17 at 16:35

neoDev

score 0 · Answer 4 · answered Sep 09 '13 at 14:57

0

Should be as simple as:

$string = implode(",",$stuffs);
echo $string

answered Sep 09 '13 at 14:57

J.Michieli

4 Answers4