PHP code example of random_compat secure random numbers

1. Go to this page and download the library: Download paragonie/random_compat library. Choose the download type require.

2. Extract the ZIP file and open the index.php.

3. Add this code to the index.php. 
    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

random_compat secure random numbers example snippets


// Generate a string of random bytes
try {
    $string = random_bytes(32);
} catch (TypeError $e) {
    // Well, it's an integer, so this IS unexpected.
    die("An unexpected error has occurred"); 
} catch (Error $e) {
    // This is also unexpected because 32 is a reasonable integer.
    die("An unexpected error has occurred");
} catch (Exception $e) {
    // If you get this message, the CSPRNG failed hard.
    die("Could not generate a random string. Is our OS secure?");
}

var_dump(bin2hex($string));
// string(64) "5787c41ae124b3b9363b7825104f8bc8cf27c4c3036573e5f0d4a91ad2eeac6f"


// Generate a random integer between two given integers (inclusive)
try {
    $int = random_int(0, 255);
} catch (TypeError $e) {
    // Well, it's an integer, so this IS unexpected.
    die("An unexpected error has occurred"); 
} catch (Error $e) {
    // This is also unexpected because 0 and 255 are both reasonable integers.
    die("An unexpected error has occurred");
} catch (Exception $e) {
    // If you get this message, the CSPRNG failed hard.
    die("Could not generate a random int. Is our OS secure?");
}

var_dump($int);
// int(47)