PHP openssl random pseudo bytes()

1 개요

PHP openssl_random_pseudo_bytes()

PHP

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for( $len=-1; $len<4; $len++) {
	$bytes = openssl_random_pseudo_bytes($len, $cstrong);
	echo "---- len = $len ----" . PHP_EOL;
	var_dump($cstrong);
	var_dump(bin2hex($bytes));
}
# ---- len = -1 ----
# NULL
# string(0) ""
# ---- len = 0 ----
# NULL
# string(0) ""
# ---- len = 1 ----
# bool(true)
# string(2) "a2"
# ---- len = 2 ----
# bool(true)
# string(4) "0edc"
# ---- len = 3 ----
# bool(true)
# string(6) "83fb29"

2 같이 보기

• PHP random_bytes()
• PHP crypt()
• PHP mt_rand()
• PHP uniqid()

3 참고 자료

• http://php.net/manual/en/function.openssl-random-pseudo-bytes.php