PHP

php array join

$arr = array('Hello','World!','Beautiful','Day!');
echo join(", ",$arr);

join array in php as string

implode("",$arr);

php join

// from PHP 8.0 (order parameters has been changed)
$arr = array('Hello','World!','Beautiful','Day!');
echo join($arr, ", ");

join string php

<?php
$arr = array('Hello','World!','Beautiful','Day!');
echo join(" ",$arr);
?>

join in php

join order parameter has been changed in php 8