PHP multi dimensional array get comma separated string value

Question

I have the following array structure:

[prod_prop] => Array
        (
            [45375] => Array
                (
                    [0] => 129|3|Mid-length
                )

            [45374] => Array
                (
                    [0] => 130|3|Long
                    [1] => 129|3|Mid-length
                )

            [45373] => Array
                (
                    [0] => 131|3|
                    [1] => 130|3|Long
                    [2] => 129|3|Mid-length
                )

        )

I want to loop through each parent number and output comma separated string of first part of second level array

So, how can I get a sting separated value for each number so desired result is as follows:

45375 -> returns 129

45374 -> returns 130,129

45373 -> returns 131,130,129

This is my current code which returns everything in the comma separated array not what im after:

 foreach($_POST['prod_prop'] AS $prop_ids) {
            $list = implode(",",$prop_ids);    
            echo $list;
        }

Returns: 131|3|131|3|,130|3|Long131|3|,130|3|Long,129|3|Mid-length 131|3|,130|3|Long,129|3|Mid-length

I've tried but not sure how identify the values in the 2nd level of the array? I can loop though fine for each top level — davey
– davey, Commented Mar 11, 2015 at 12:54
Hmmm i think i see the error of my ways! Each element is a string already with | seperater this should be another array instead — davey
– davey, Commented Mar 11, 2015 at 13:10

deceze · Accepted Answer · 2015-03-11 14:28:48Z

2

foreach ($_POST['prod_prop'] as $prop_ids) {
    $list = join(',', array_map(
        function ($id) { return current(explode('|', $id)); },
        $prop_ids
    ));    
    echo $list;
}

edited Mar 11, 2015 at 14:28

answered Mar 11, 2015 at 13:12

deceze♦

525k89 gold badges806 silver badges954 bronze badges

Sign up to request clarification or add additional context in comments.

5 Comments

davey Over a year ago

This works well , however i should probably due a sub array rather than explode on the string containing |. thanks

davey Over a year ago

How does this exactly work? does map to elements that contain |

deceze Over a year ago

An array_map is the same as $res = array(); foreach ($arr as $i) $res[] = func($i);, where func is the function given above. Play around with it.

davey Over a year ago

last question i'm struggling to get the parent KEYs 45375 ,45374, 45373 etc. Trying key($_POST['prod_prop']) but it stays on the first key?

deceze Over a year ago

foreach ($_POST['prod_prop'] as $key => $prop_ids)

Utkarsh Dixit · Accepted Answer · 2015-03-11 13:26:02Z

0

You can archive this with using these functions:- end(),explode(),trim(). Use the code below

$last = end($_POST['prod_prop']);
 foreach($_POST['prod_prop'] AS $prop_ids) {
foreach($prop_ids as $s){
$list .= ",".explode("|",$s)[0];
}
if($prop_ids==$last){
echo trim($list,",")."";
}
else{
echo trim($list,",").",";
}


        }

Try it for yourself.Hope this helps you.

edited Mar 11, 2015 at 13:26

answered Mar 11, 2015 at 12:54

Utkarsh Dixit

4,2853 gold badges18 silver badges42 bronze badges

2 Comments

davey Over a year ago

This isn't really my desired result this brings back: 131|3|131|3|,130|3|Long131|3|,130|3|Long,129|3|Mid-length 131|3|,130|3|Long,129|3|Mid-length

Utkarsh Dixit Over a year ago

@darvey it was just a hint, if you want your desired result use implode with explode. Wait posting your answer

cyadvert · Accepted Answer · 2015-03-11 13:47:10Z

Why don't you scroll through array, implode() its values, and apply regex onto it?

$res = Array();
foreach($_POST["prod_prop"] as $bID=>$bLists) {

   $str = implode(",", $bLists); // get list of values comma separated

   preg_match_all("/(^|,)(\d+)/", $str, $m); //get all digits, which follow string start or comma

   if (Count($m[1])) { // if value found - store it in $res array
      $res[$bID] = implode(",", $m[1]);
   }
}

One note: I'm not sure about syntax of regex in PHP. In javascript the following works

var str = "131|3|,130|3|Long,129|3|Mid-length";
$('#result').html(str.match(/(^|,)(\d+)/g));

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<span id="result"></span>

dcarrith · Accepted Answer · 2015-03-11 14:00:54Z

0

This sounds like a good use-case for array_reduce. Try this:

foreach($_POST['prod_prop'] as $id => $properties) {

    $result = array_reduce($properties, function($val, $item) {

        return $val . ',' . substr($item, 0, strpos($item, '|'));
    });

    echo $result;
}

edited Mar 11, 2015 at 14:00

answered Mar 11, 2015 at 13:48

dcarrith

7,9802 gold badges21 silver badges9 bronze badges

Comments

mickmackusa · Accepted Answer · 2022-07-27 05:50:25Z

0

Use iterated calls of strtok() calls on each subarray to isolate the substring before the first pipe, then implode() the truncated elements before echoing.

foreach ($_POST['prod_prop'] as $prop_ids) {
    echo implode(',', array_map(fn($v) => strtok($v, '|'), $prop_ids)) . '<br>';
}

answered Jul 27, 2022 at 5:50

mickmackusa♦

49.2k13 gold badges98 silver badges165 bronze badges

Collectives™ on Stack Overflow

PHP multi dimensional array get comma separated string value

5 Answers 5

5 Comments

2 Comments

Comments

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

5 Answers 5

5 Comments

2 Comments

Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related