PHP sodium_crypto_generichash_update() Function: Usage and Examples

When a PHP application needs to uses sodium_crypto_generichash_update to process its supported input, choosing the right API and checking its results helps keep code understandable and dependable. This guide explains sodium_crypto_generichash_update with focused examples and important details.

What Is sodium_crypto_generichash_update in PHP?

sodium_crypto_generichash_update uses sodium_crypto_generichash_update to process its supported input. The hash state is passed by reference and should be finalized only after all chunks have been supplied.

Syntax:

sodium_crypto_generichash_update(state, message) : true

Parameters and return value: Parameters: <required> string &$state; <required> string $message. Check the return value or modified object rather than assuming the operation always succeeds.

Important: The code examples use representative input rather than production credentials. Confirm that the required PHP extension is installed.

Example 1: Basic Usage

Start with a compact input so the main operation is visible.

<?php

$state = sodium_crypto_generichash_init();
sodium_crypto_generichash_update($state,"hello");
echo bin2hex(sodium_crypto_generichash_final($state));

Output:

324dcf027dd4a30a932c441f365a25e86b173defa4b8e58948253471b81b72cf

Uses sodium_crypto_generichash_update to process its supported input. The hash state is passed by reference and should be finalized only after all chunks have been supplied.

Example 2: A Different Input

The next example changes the input or option to illustrate another behavior.

<?php

$state = sodium_crypto_generichash_init();
foreach (["abc","def"] as $part) { sodium_crypto_generichash_update($state,$part); }
echo bin2hex(sodium_crypto_generichash_final($state));

Output:

755b8c020bf6b81a3e1d069e177e19e3892c256595c1a94ddb5a902b9e3c6212

Compare this result with the first example. The hash state is passed by reference and should be finalized only after all chunks have been supplied.

Practical Example: Applying the Function

This example combines the API with a realistic processing step and shows where to check its result.

<?php

$state = sodium_crypto_generichash_init();
$chunks = ["header", "body", "footer"];
foreach ($chunks as $chunk) { sodium_crypto_generichash_update($state,$chunk); }
echo bin2hex(sodium_crypto_generichash_final($state));

Output:

e1a43f96ebba09206e07213fc9b9aaf17134bbb1cf28de1ad2a3ff6f2a26c886

Adapt the inputs to your application and validate the output before storing or displaying it. The hash state is passed by reference and should be finalized only after all chunks have been supplied.

Important Behavior and Edge Cases

• Main purpose: Uses sodium_crypto_generichash_update to process its supported input.
• Errors and boundaries: The hash state is passed by reference and should be finalized only after all chunks have been supplied.
• Environment: The code examples use representative input rather than production credentials. Confirm that the required PHP extension is installed.

Comparison With Related Functions

Common Beginner Mistakes

Key Takeaways

• Uses sodium_crypto_generichash_update to process its supported input.
• The hash state is passed by reference and should be finalized only after all chunks have been supplied.
• The code examples use representative input rather than production credentials. Confirm that the required PHP extension is installed.

Use sodium_crypto_generichash_update when you need to uses sodium_crypto_generichash_update to process its supported input. The three examples move from a simple call to a practical use. Validate all external input and handle failures explicitly.