How can variables or session IDs be passed through URLs in PHP?

To pass variables or session IDs through URLs in PHP, you can use query parameters in the URL. This involves appending key-value pairs to the URL, separated by a question mark and ampersands. These parameters can then be accessed in PHP using the $_GET superglobal array. It is important to sanitize and validate any input received through URLs to prevent security vulnerabilities. 

// Example of passing a variable through a URL
$variable = "example";
$url = "http://example.com/page.php?var=" . urlencode($variable);

// Accessing the variable in PHP
if(isset($_GET['var'])){
    $received_variable = $_GET['var'];
    // Use the received variable in your code
}

Keywords

PHP variables session IDs URL passing

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