How can variables be passed in URLs without duplication or overwriting in PHP?

When passing variables in URLs in PHP, you can use the `$_GET` superglobal array to retrieve the values. To avoid duplication or overwriting of variables, you can append the variables to the URL using the `&` symbol to separate them. This way, each variable will have a unique key in the URL, preventing any conflicts. 

// Example of passing variables in URLs without duplication or overwriting
$variable1 = "value1";
$variable2 = "value2";

$url = "example.php?variable1=" . $variable1 . "&variable2=" . $variable2;

// To retrieve the values in example.php
$var1 = $_GET['variable1'];
$var2 = $_GET['variable2'];

echo "Variable 1: " . $var1 . "<br>";
echo "Variable 2: " . $var2;

Keywords

PHP URL parameters $_GET $_POST URL encoding

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