CODEWITHSUNDEEP
phparrays
st4ck0v3rfl0w
st4ck0v3rfl0w

Reputation: 6755

How do I create a comma-separated list from an array in PHP?

I know how to loop through items of an array using foreach and append a comma, but it's always a pain having to take off the final comma. Is there an easy PHP way of doing it?

$fruit = array('apple', 'banana', 'pear', 'grape');

Ultimately I want

$result = "apple, banana, pear, grape"

Upvotes: 128

Views: 241693

Answers (11)

Ariful Islam
Ariful Islam

Reputation: 893

Follow this one 

$teacher_id = '';

        for ($i = 0; $i < count($data['teacher_id']); $i++) {

            $teacher_id .= $data['teacher_id'][$i].',';

        }
        $teacher_id = rtrim($teacher_id, ',');
        echo $teacher_id; exit;

Upvotes: 0

Waqar Alamgir
Waqar Alamgir

Reputation: 9968

Result with and in the end:

$titleString = array('apple', 'banana', 'pear', 'grape');
$totalTitles = count($titleString);
if ($totalTitles>1) {
    $titleString = implode(', ', array_slice($titleString, 0, $totalTitles-1)) . ' and ' . end($titleString);
} else {
    $titleString = implode(', ', $titleString);
}

echo $titleString; // apple, banana, pear and grape

Upvotes: 9

Vijay Prajapati
Vijay Prajapati

Reputation: 71

$fruit = array('apple', 'banana', 'pear', 'grape');    
$commasaprated = implode(',' , $fruit);

Upvotes: 4

Danielside
Danielside

Reputation: 1

A functional solution would go like this:

$fruit = array('apple', 'banana', 'pear', 'grape');
$sep = ','; 

array_reduce(
    $fruits,
    function($fruitsStr, $fruit) use ($sep) {
        return (('' == $fruitsStr) ? $fruit : $fruitsStr . $sep . $fruit);
    },
    ''
);

Upvotes: 0

ryeguy
ryeguy

Reputation: 66851

You want to use implode for this.

ie: $commaList = implode(', ', $fruit);

There is a way to append commas without having a trailing one. You'd want to do this if you have to do some other manipulation at the same time. For example, maybe you want to quote each fruit and then separate them all by commas:

$prefix = $fruitList = '';
foreach ($fruits as $fruit)
{
    $fruitList .= $prefix . '"' . $fruit . '"';
    $prefix = ', ';
}

Also, if you just do it the "normal" way of appending a comma after each item (like it sounds you were doing before), and you need to trim the last one off, just do $list = rtrim($list, ', '). I see a lot of people unnecessarily mucking around with substr in this situation.

Upvotes: 250

Lloyd Banks
Lloyd Banks

Reputation: 36638

I prefer to use an IF statement in the FOR loop that checks to make sure the current iteration isn't the last value in the array. If not, add a comma

$fruit = array("apple", "banana", "pear", "grape");

for($i = 0; $i < count($fruit); $i++){
    echo "$fruit[$i]";
    if($i < (count($fruit) -1)){
      echo ", ";
    }
}

Upvotes: 3

Nate
Nate

Reputation: 28354

This is how I've been doing it:

$arr = array(1,2,3,4,5,6,7,8,9);

$string = rtrim(implode(',', $arr), ',');

echo $string;

Output:

1,2,3,4,5,6,7,8,9

Live Demo: http://ideone.com/EWK1XR

EDIT: Per @joseantgv's comment, you should be able to remove rtrim() from the above example. I.e:

$string = implode(',', $arr);

Upvotes: 40

Sanjay Arora
Sanjay Arora

Reputation: 1

$letters = array("a", "b", "c", "d", "e", "f", "g"); // this array can n no. of values
$result = substr(implode(", ", $letters), 0);
echo $result

output-> a,b,c,d,e,f,g

Upvotes: -2

Lux.Capacitor
Lux.Capacitor

Reputation: 346

Sometimes you don't even need php for this in certain instances (List items each are in their own generic tag on render for example) You can always add commas to all elements but last-child via css if they are separate elements after being rendered from the script.

I use this a lot in backbone apps actually to trim some arbitrary code fat:

.likers a:not(:last-child):after { content: ","; }

Basically looks at the element, targets all except it's last element, and after each item it adds a comma. Just an alternative way to not have to use script at all if the case applies.

Upvotes: 1

ceasetodream
ceasetodream

Reputation: 66

Similar to Lloyd's answer, but works with any size array.

$missing = array();
$missing[] = 'name';
$missing[] = 'zipcode';
$missing[] = 'phone';

if( is_array($missing) && count($missing) > 0 )
        {
            $result = '';
            $total = count($missing) - 1;
            for($i = 0; $i <= $total; $i++)
            { 
              if($i == $total && $total > 0)
                   $result .= "and ";

              $result .= $missing[$i];

              if($i < $total)
                $result .= ", ";
            }

            echo 'You need to provide your '.$result.'.';
            // Echos "You need to provide your name, zipcode, and phone."
        }

Upvotes: 4

vogomatix
vogomatix

Reputation: 5041

If doing quoted answers, you can do

$commaList = '"'.implode( '" , " ', $fruit). '"';

the above assumes that fruit is non-null. If you don't want to make that assumption you can use an if-then-else statement or ternary (?:) operator.

Upvotes: -1

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