how to concatenate strings php code example

Example 1: php concat

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

echo $c; // hello world

Example 2: php concat variable and string

<?php
  $name = "Paul";	
  $age = 26;

  echo "My name is {$name}, I'm {$age} years old ";