如何在数组上修剪foreach的输出

Question

Ive got an array of Wordpress-Categories. What I want, is to output their names, seperated with a comma. - like this:

category1, category2, category3, category4, category5, ...

I tried this foreach loop:

foreach ($category as $cat){
  $catList = $cat->name.', ';
  echo $catList ;
}

But the output looks like this: category1, category2, category3,

As you can see, there is a comma at the end, which I dont want.

How would this work?

Answer 1

Here is a simple way, just off the top of my head:

$firstitem=1;
foreach ($category as $cat) {
    if ($firstitem == 1) {
        $firstitem = 0;
    } else {
        $catList .= ', ';
    }
    $catList .= $cat->name;
}
echo $catList ;

Of course, you could just echo the comma and name values without saving them. I did it this way in case you wanted to do something else with the catList string.