In PHP, the string concatenation operator is code example
Example 1: php append string
<?php
$a = "Hello ";
$b = $a . "World!"; // now $b contains "Hello World!"
$a = "Hello ";
$a .= "World!"; // now $a contains "Hello World!"
?>
Example 2: concatenate string php
<?php
// First String
$a = 'Hello';
// Second String
$b = 'World!';
// Concatenation Of String
$c = $a.$b;
// print Concatenate String
echo " $c \n";
?>