implode() string, but also append the glue at the end

Question

Trying to use the implode() function to add a string at the end of each element.

$array = array('9898549130', '9898549131', '9898549132');
$attUsers = implode("@txt.att.net,", $array);

print($attUsers);

Prints this:

9898549130@txt.att.net,9898549131@txt.att.net,9898549132

How do I get implode() to also append the glue for the last element?

Expected output:

9898549130@txt.att.net,9898549131@txt.att.net,9898549132@txt.att.net
                                                      //^^^^^^^^^^^^ See here

implode isn't really the right tool for this job. A foreach with a concatenate would work fine. — Richard - Rogue Wave Limited, Sep 01 '15 at 17:00
implode joins array elements. it doesn't APPEND to all of them. if you have 3 elements, you get 2 joins, not 3. — Marc B, Sep 01 '15 at 17:08
FYI: You can take a quick tour here and get an overview of the site: http://stackoverflow.com/tour (Note: You can accept your own answer if you want) — Rizier123, Sep 01 '15 at 17:35

score 8 · Answer 1 · answered Oct 15 '16 at 14:33

There is a simpler, better, more efficient way to achieve this using array_map and a lambda function:

$numbers = ['9898549130', '9898549131', '9898549132'];

$attUsers = implode(
    ',',
    array_map(
        function($number) {
            return($number . '@txt.att.net');
        },
        $numbers
    )
);

print_r($attUsers);

score 2 · Answer 2 · answered Sep 01 '15 at 17:04

2

This seems to work, not sure its the best way to do it:

$array = array('9898549130', '9898549131', '9898549132');
$attUsers = implode("@txt.att.net,", $array) . "@txt.att.net";
print($attUsers);

answered Sep 01 '15 at 17:04

Ryan Litwiller

497
5
24

I think it is as good as you can get. Another way would be to append the string to each element and then imploding the array by a comma. – Rizier123 Sep 01 '15 at 17:24

score 2 · Answer 3 · edited May 23 '17 at 12:13

2

Append an empty string to your array before imploding.
But then we have another problem, a trailing comma at the end.
So, remove it.

Input:

$array = array('9898549130', '9898549131', '9898549132', '');
$attUsers = implode("@txt.att.net,", $array);
$attUsers = rtrim($attUsers, ",")

Output:

9898549130@txt.att.net,9898549131@txt.att.net,9898549132@txt.att.net

edited May 23 '17 at 12:13

Community

1
1

answered Nov 16 '16 at 15:50

Khalil Fazal

41
2
4

score 1 · Accepted Answer · answered Sep 03 '15 at 11:05

This was an answer from my friend that seemed to provide the simplest solution using a foreach.

$array = array ('1112223333', '4445556666', '7778889999');

// Loop over array and add "@att.com" to the end of the phone numbers
foreach ($array as $index => &$phone_number) {
    $array[$index] = $phone_number . '@att.com';
}

// join array with a comma
$attusers = implode(',',$array);  

print($attusers);

score 0 · Answer 5 · answered Sep 01 '15 at 17:06

0

$result = '';
foreach($array as $a) {
    $result = $result . $a . '@txt.att.net,';
}
$result = trim($result,',');

answered Sep 01 '15 at 17:06

Richard - Rogue Wave Limited

372
3
15

score -1 · Answer 6 · answered Sep 01 '15 at 17:00

-1

There is a simple solution to achieve this :

$i = 1;
$c = count($array);

foreach ($array as $key => $val) {
    if ($i++ == $c) {
        $array[$key] .= '@txt.att.net';
    }
}

answered Sep 01 '15 at 17:00

Happy Coding

2,517
1
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implode() string, but also append the glue at the end

6 Answers6