(PHP 4, PHP 5, PHP 7 < 7.2.0, PECL mcrypt >= 1.0.0)
mcrypt_create_iv — 锟斤拷锟斤拷锟皆达拷锟斤拷锟斤拷锟绞硷拷锟斤拷锟�
This function was DEPRECATED in PHP 7.1.0, and REMOVED in PHP 7.2.0.
Alternatives to this function include:
$size
[, int $source = MCRYPT_DEV_URANDOM
] ) : string锟斤拷锟斤拷锟皆达拷锟斤拷锟斤拷锟绞硷拷锟斤拷锟斤拷锟�
锟斤拷始锟斤拷锟斤拷只锟斤拷为锟剿革拷锟斤拷锟斤拷锟姐法锟结供一锟斤拷锟斤拷锟矫碉拷锟斤拷锟接ｏ拷 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷要锟斤拷全锟斤拷锟斤拷锟斤拷 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷同锟斤拷锟斤拷一锟金发诧拷锟斤拷始锟斤拷锟斤拷也锟斤拷锟斤拷园锟饺拷源锟斤拷锟接帮拷臁�
size锟斤拷始锟斤拷锟斤拷锟斤拷小锟斤拷
source
锟斤拷始锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷源锟斤拷锟斤拷选值锟叫ｏ拷
MCRYPT_RAND 锟斤拷系统锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟�,
MCRYPT_DEV_RANDOM 锟斤拷锟斤拷
/dev/random 锟侥硷拷锟斤拷取锟斤拷锟捷ｏ拷 锟斤拷
MCRYPT_DEV_URANDOM 锟斤拷锟斤拷
/dev/urandom 锟侥硷拷锟斤拷取锟斤拷锟捷ｏ拷锟斤拷
锟斤拷 Windows 平台锟斤拷PHP 5.3.0 之前锟侥版本锟叫ｏ拷锟斤拷支锟斤拷 MCRYPT_RAND锟斤拷
锟斤拷注锟解，锟斤拷 PHP 5.6.0 之前锟侥版本锟叫ｏ拷
锟剿诧拷锟斤拷锟斤拷默锟斤拷值为 MCRYPT_DEV_RANDOM锟斤拷
Note: 锟斤拷要注锟斤拷锟斤拷牵锟斤拷锟斤拷没锟叫革拷锟斤拷锟斤拷玫锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟捷碉拷锟斤拷息锟斤拷锟斤拷么
MCRYPT_DEV_RANDOM锟斤拷锟杰斤拷锟斤拷锟斤拷锟斤拷状态锟斤拷
锟斤拷锟截筹拷始锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷蚍祷锟� FALSE锟斤拷
| 锟芥本 | 说锟斤拷 |
|---|---|
| 5.6.0 |
source 锟斤拷锟斤拷锟斤拷默锟斤拷值锟斤拷
MCRYPT_DEV_URANDOM锟斤拷
|
| 5.3.0 |
MCRYPT_DEV_RANDOM 锟斤拷
MCRYPT_DEV_URANDOM 锟斤拷 Windows 平台也锟斤拷锟斤拷锟剿★拷
|
| 5.3.0 | 锟斤拷锟斤拷锟斤拷要锟斤拷前锟斤拷锟斤拷 srand() 锟斤拷锟斤拷锟斤拷 锟缴憋拷锟斤拷锟斤拷锟皆讹拷锟斤拷傻锟斤拷谩锟� |
Example #1 mcrypt_create_iv() 锟斤拷锟斤拷
<?php
$size = mcrypt_get_iv_size(MCRYPT_CAST_256, MCRYPT_MODE_CFB);
$iv = mcrypt_create_iv($size, MCRYPT_DEV_RANDOM);
?>