concatenate a string in php code example

Example 1: php concat

$a = "hello";
$b = "world";
$c = $a . " " . $b;

echo $c; // hello world

Example 2: join string php

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

Example 3: php concatenate two variables

$string = "the color is ";
$string .= "red";

echo $string; // gives: the color is red