(PHP 5 >= 5.1.2, PHP 7, PECL hash >= 1.1)
hash_init — 锟斤拷始锟斤拷锟斤拷锟斤拷锟斤拷希锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷
$algo
[, int $options = 0
[, string $key = NULL
]] ) : HashContext
algo要使锟矫的癸拷希锟姐法锟斤拷锟狡ｏ拷锟斤拷锟界："md5"锟斤拷"sha256"锟斤拷"haval160,4" 锟饺★拷 锟斤拷位锟饺★拷锟街э拷值锟斤拷惴拷宓ワ拷锟斤拷锟轿硷拷 hash_algos()锟斤拷
options
锟斤拷锟叫癸拷希锟斤拷锟斤拷目锟窖★拷锟斤拷茫锟侥壳帮拷锟街э拷锟揭伙拷锟窖★拷睿�HASH_HMAC锟斤拷
锟斤拷指锟斤拷锟斤拷选锟斤拷锟绞憋拷锟�锟斤拷锟斤拷 指锟斤拷 key 锟斤拷锟斤拷锟斤拷
key
锟斤拷 options 锟斤拷锟斤拷为 HASH_HMAC 时锟斤拷
使锟矫此诧拷锟斤拷锟斤拷锟斤拷锟斤拷锟� HMAC 锟斤拷希锟斤拷锟斤拷时锟侥癸拷锟斤拷锟斤拷钥锟斤拷
锟斤拷锟截癸拷希锟斤拷锟斤拷锟斤拷锟斤拷锟侥讹拷锟斤拷锟皆癸拷 hash_update()锟斤拷 hash_update_stream()锟斤拷hash_update_file(), 锟斤拷 hash_final() 锟斤拷锟斤拷使锟矫★拷
| 锟芥本 | 说锟斤拷 |
|---|---|
| 7.2.0 | 锟斤拷使锟斤拷 HASH_HMAC 选锟斤拷锟绞憋拷颍锟斤拷锟街э拷址羌锟斤拷艿墓锟较ｏ拷锟斤拷锟斤拷锟絘dler32锟斤拷crc32锟斤拷crc32b锟斤拷fnv132锟斤拷fnv1a32锟斤拷fnv164锟斤拷fnv1a64锟斤拷joaat锟斤拷锟斤拷 |
| 7.2.0 | 锟斤拷锟斤拷 HashContext 锟斤拷锟襟，诧拷锟劫凤拷锟斤拷锟斤拷源锟斤拷锟酵★拷 |
Example #1 锟斤拷锟斤拷锟斤拷希锟斤拷锟斤拷锟斤拷锟斤拷
<?php
$ctx = hash_init('md5');
hash_update($ctx, 'The quick brown fox ');
hash_update($ctx, 'jumped over the lazy dog.');
echo hash_final($ctx);
?>
锟斤拷锟斤拷锟斤拷锟教伙拷锟斤拷锟斤拷锟�
5c6ffbdd40d9556b73a21e63c3e0e904