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global

This code is an example of global variables in PHP. Global variables are variables that are defined outside of any function and can be accessed from anywhere in the script, including inside functions.

The code creates a global variable named $color and assigns it the value "red". Then, it defines a function called myTest() that uses the global variable $color. Inside the function, the code uses the global keyword to indicate that it wants to access the global $color variable, rather than a local variable with the same name.

The code then includes an HTML document that includes a PHP script that calls the myTest() function. This function will print "My car is red" on the page.

It is worth noting that global variables can be accessed and modified from anywhere in the script, including inside functions, which can make code less readable, and harder to maintain. So, it is recommended to use global variables only when necessary.

<?php
//create an example of global variables
//create a variable in the global scope
$color = "red";
//create a function that uses the global variable
function myTest() {
    //use x inside this function
    global $color;
    echo "My car is " . $color . "<br>";
}
?>
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<?php
myTest();
?>
</body>
</html>

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