CodeToLive

PHP Variables and Data Types

Variable Declaration

<?php
$txt = "Hello world!";
$x = 5;
$y = 10.5;
?>
      

Data Types

<?php
$str = "String";      // String
$int = 42;            // Integer
$float = 3.14;        // Float
$bool = true;         // Boolean
$arr = array(1, 2, 3);// Array
$obj = new MyClass(); // Object
$null = NULL;         // NULL
?>
      

Variable Scope

<?php
$globalVar = "I'm global";

function test() {
    $localVar = "I'm local";
    global $globalVar; // Access global variable
    echo $globalVar;
}
?>