php implode if ther more than 1 php code example

Example 1: php implode

$colors = array("red","blue","green");
$colorsCSV= "'".implode("','",$colors)."'";
//$colorsCSV: 'red','blue','green'

Example 2: php implode

$arr = ['Thor','Captain America','Iron Man'];
echo implode(', ',$arr);
// "Thor, Captain America, Iron Man"