How can I identify variables passed through the URL in PHP?

To identify variables passed through the URL in PHP, you can use the $_GET superglobal array. This array contains key-value pairs of all the variables passed in the URL. You can access these variables by using their keys as indices in the $_GET array. 

// Check if a variable named 'id' is passed through the URL
if(isset($_GET['id'])){
    $id = $_GET['id'];
    echo "The value of 'id' variable is: " . $id;
} else {
    echo "No 'id' variable passed through the URL";
}

Keywords

PHP URL variables $_GET parsing

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