Removing last comma in PHP?

Question

I have this PHP code:

foreach( $wpdb->get_results(
) as $key => $row) {

echo \"[\'\". $row->DATE . \"\',\". $row->total_sales . \"],\";

}
         


        

Answer 1

I like the implode idea, but I often use the ternary operator to keep everything succinct. Many people don't like the ternary, but it is a very well-known construct in many languages so I use it. In this case, if I'm on the first iteration $results will be empty so I don't insert a comma, otherwise I put a comma in the content before the new data:

$results = '';
foreach( $wpdb->get_results() as $key => $row) {

    $results .= (empty($results) ? '' : ',') . "['". $row->DATE . "',". $row->total_sales . "]";

}
echo $results;