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<?php class TokenGenerator { const ALPHABET = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'; public function generateToken($length = 16) { $alphabetSize = strlen(self::ALPHABET); $token = ''; while (strlen($token) < $length) { $randomBytes = hash_hmac('sha256', openssl_random_pseudo_bytes(20), mcrypt_create_iv(20, \MCRYPT_DEV_URANDOM)); $offset = abs(hexdec(bin2hex(substr($randomBytes, 0, 4)))) % $alphabetSize; $token .= substr(self::ALPHABET, $offset, 1); } return $token; } } $gen = new TokenGenerator(); var_dump($gen->generateToken(10)); var_dump($gen->generateToken(10)); var_dump($gen->generateToken(10)); var_dump($gen->generateToken(20)); var_dump($gen->generateToken(20)); var_dump($gen->generateToken(20));
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught Error: Call to undefined function openssl_random_pseudo_bytes() in /in/9LZu6:13 Stack trace: #0 /in/9LZu6(24): TokenGenerator->generateToken(10) #1 {main} thrown in /in/9LZu6 on line 13
Process exited with code 255.
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Fatal error: Call to undefined function openssl_random_pseudo_bytes() in /in/9LZu6 on line 13
Process exited with code 255.
Output for 5.1.2 - 5.1.6, 5.2.0 - 5.2.17
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/9LZu6 on line 13 Fatal error: Call to undefined function openssl_random_pseudo_bytes() in /in/9LZu6 on line 13
Process exited with code 255.
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.1
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/9LZu6 on line 13 Fatal error: Call to undefined function hash_hmac() in /in/9LZu6 on line 13
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_CONST, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/9LZu6 on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_CONST, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/9LZu6 on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/9LZu6 on line 5
Process exited with code 255.
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