variables data type in php code example

Example 1: php define variable type

<?php
$foo = "5bar"; // string
$bar = true;   // boolean

settype($foo, "integer"); // $foo is 5   (integer)
settype($bar, "string");  // $bar is "1" (string)
?>

Example 2: PHP Data Types

<?php
$x = "Hello world!";
$y = 'Hello world!';

echo $x;
echo "<br>";
echo $y;
?>