hash_inithash_init (no version information, might be only in CVS) hash_init -- Initialize an incremental hashing context Descriptionresource hash_init ( string algo [, int options, string key] ) Parameters
- algo
Name of selected hashing algorithm (i.e. "md5", "sha256", "haval160,4", etc..)
- options
Optional settings for hash generation, currently supports only one option:
HASH_HMAC. When specified, the key
must be specified.
- key
When HASH_HMAC is specified for options,
a shared secret key to be used with the HMAC hashing method must be supplied in this
parameter.
Examples
Example 1. Incremental hashing example
<?php
$ctx = hash_init('md5');
hash_update($ctx, 'The quick brown fox ');
hash_update($ctx, 'jumped over the lazy dog.');
echo hash_final($ctx);
?>
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The above example will output: 5c6ffbdd40d9556b73a21e63c3e0e904 |
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