a PHP script to compress, save and decompress data

compressanddecompressphp

<?php

// Define the data to be saved (replace with your actual data)
$data = array(
  "name" => "John Doe",
  "age" => 30,
  "address" => array(
    "street" => "123 Main St",
    "city" => "Anytown",
    "state" => "CA",
  ),
  // Add more complex data structures as needed
);

// Filename for storing the compressed data
$filename = "data.txt.gz";

// Function to compress and save data
function saveCompressedData($data, $filename) {
  if (!is_writable(dirname($filename))) {
    throw new Exception("Directory is not writable: " . dirname($filename));
  }
  
  // Serialize the data
  $serializedData = serialize($data);
  
  // Compress the serialized data
  $compressedData = gzcompress($serializedData, 9); // Adjust compression level if needed
  
  // Open the file for writing in binary mode
  $file = fopen($filename, "wb");
  
  // Write the compressed data to the file
  fwrite($file, $compressedData);
  
  // Close the file
  fclose($file);
}

// Function to decompress and unserialize data
function loadCompressedData($filename) {
  if (!file_exists($filename)) {
    throw new Exception("File does not exist: " . $filename);
  }
  
  // Open the file for reading in binary mode
  $file = fopen($filename, "rb");
  
  // Read the compressed data from the file
  $compressedData = fread($file, filesize($filename));
  
  // Close the file
  fclose($file);
  
  // Decompress the data
  $decompressedData = gzdecode($compressedData);
  
  // Unserialize the decompressed data
  $data = unserialize($decompressedData);
  
  return $data;
}

try {
  // Save the compressed data
  saveCompressedData($data, $filename);
  
  echo "Data saved successfully to: " . $filename . "\n";
  
  // Load the compressed data
  $loadedData = loadCompressedData($filename);
  
  // Verify the loaded data
  if ($loadedData === $data) {
    echo "Data loaded and verified successfully.\n";
  } else {
    echo "Error: Loaded data does not match original data.\n";
  }
} catch (Exception $e) {
  echo "Error: " . $e->getMessage();
}