How can I easily remove the last comma from an array?

Question

Let\'s say I have this:

$array = array(\"john\" => \"doe\", \"foe\" => \"bar\", \"oh\" => \"yeah\");

foreach($array as $i=>$k)
{
echo $i.\'-\'.$         


        

Answer 1

I always use this method:

$result = '';
foreach($array as $i=>$k) {
    if(strlen($result) > 0) {
        $result .= ","
    }
    $result .= $i.'-'.$k;
}
echo $result;

Answer 2

I dislike all previous recipes.

Php is not C and has higher-level ways to deal with this particular problem.

I will begin from the point where you have an array like this:

$array = array('john-doe', 'foe-bar', 'oh-yeah');

You can build such an array from the initial one using a loop or array_map() function. Note that I'm using single-quoted strings. This is a micro-optimization if you don't have variable names that need to be substituted.

Now you need to generate a CSV string from this array, it can be done like this:

echo implode(',', $array);

Answer 3

Alternatively you can use the rtrim function as:

$result = '';
foreach($array as $i=>$k) {
    $result .= $i.'-'.$k.',';
}
$result = rtrim($result,',');
echo $result;

Answer 4

this would do:

rtrim ($string, ',')