What role does caching play in optimizing PHP applications and handling browser back button issues?

Caching plays a crucial role in optimizing PHP applications by storing frequently accessed data or processed results, reducing the need for repeated computations. When handling browser back button issues, caching can help maintain the state of the application and prevent redundant server requests. 

<?php
// Start a session to store data for browser back button
session_start();

// Check if data is cached in session
if(isset($_SESSION['cached_data'])){
    // Use cached data instead of recomputing
    $data = $_SESSION['cached_data'];
} else {
    // Compute data
    $data = compute_data();

    // Cache data in session
    $_SESSION['cached_data'] = $data;
}

// Function to compute data
function compute_data(){
    // Perform computations here
    return $computed_data;
}
?>

Keywords

Caching PHP applications Browser back button Optimization Handling

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