Operators And Expressions
practice.

<?php
$one = "Hello";
$two = "World";
echo $one,$two;
?>

<?php
$one = "Hello";
$two = "World";
echo "$one$two";
?>

<?php
$one = "Hello";
$two = "World";
echo "$one"</span><spanclass="p-blue">+</span><spanclass="p-red">"$two";
?>

<?php
echo "This is India";
?>

<?php
$cars = array("Volvo", "BMW", "Toyota");
echo "My car is a {$cars[0]}";
?>

<?php
print "echo hello world";
?>

<?php
$one = 1;
print($one);
print $one;
?>

<?php
$cars = array("Volvo", "BMW", "Toyota");
print $cars[2];
?>

<?php
$one = "one";
$two = "two";
print($one$two);
?>

<?php
$one = "one";
$two = "two";
print($one,$two);
?>

<?php
$one = "one";
$two = "two";
print("$one$two");
?>

<?php
$one = "one";
$two = "two";
print($one<spanclass="p-blue">==</span>$two);
?>

<?php
$one = "one";
$two = "one";
print($one<spanclass="p-blue">==</span>$two);
?>

<?php
print("this"."was"."a"."bad"."idea");
?>

<?php
define("GREETING", "PHP is a scripting language");
echo $GREETING;
?>

<?php
class Constants
{
    define('MIN_VALUE', '0.0');  
    define('MAX_VALUE', '1.0');  
    public static function getMinValue()
    {
        return self::MIN_VALUE;
    }
    public static function getMaxValue()
    {
        return self::MAX_VALUE;
    }
}
echo Constants::getMinValue();
echo Constants::getMaxValue();
?>

<?php
define("__LINE__", "PHP is a scripting language");
echo __LINE__;
?>

<?php
define('IF', 42); 
echo "IF: ", IF;
?>

<?php
define("NEW_GOOD_NAME_CONSTANT", "I have a value");
define("OLD_BAD_NAME_CONSTANT", NEW_GOOD_NAME_CONSTANT);
 
echo NEW_GOOD_NAME_CONSTANT;
echo OLD_BAD_NAME_CONSTANT; 
?>

<?php
define("VAR_NAME","test"); 
${VAR_NAME} = "value"; 
echo VAR_NAME;
echo ${VAR_NAME}; 
?>