random_bytes to generate cryptographically secure random bytes
Generate cryptographically secure random bytes
random_bytes() returns raw random bytes suitable for secrets and other security-sensitive values. Encode the bytes when you need a printable token.
$token = bin2hex(random_bytes(16));
echo $token; // 32 hexadecimal charactersecho random_bytes($length);Generates cryptographically secure random bytes that can be used for secrets, tokens, keys and nonces.
Available in PHP 7 and PHP 8.
Example
$str=random_bytes(7);
echo bin2hex($str);20748ba694e1c9Example 1: Generating Cryptographically Secure API Keys
<?php
$key = bin2hex(random_bytes(16)); // Generates a 32-character API key
echo "Generated API key: $key";
?>Example 2: Creating Random Passwords
<?php
$password = bin2hex(random_bytes(8)); // Generates a secure 16-character password
echo "Random password: $password";
?>Example 3: Generating a random nonce
<?php
$salt = bin2hex(random_bytes(16)); // 16-byte random nonce
echo "Generated nonce: $salt";
?>String Functions how to change all the letters to upper case nl2br() To add Line break
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