/**

* @brief uses HMAC-SHA 1 algorithm to generate the signature value of oauth_signature.

*

* @param $key key

* @ param＄str source string

*

* @ Returns the signature value

*/

The function getSignature($str, $key) {

$ signature =

if(function _ exists(' hash _ hmac '){

$ signature = base64 _ encode(hash _ hmac(" sha 1 "，$str，$key，true))；

} Otherwise {

$ blocksize = 64

$ hash func = ' sha 1 '；

if (strlen($key)>$blocksize) {

$key = pack('H* '，$ hash func($ key))；

}

$key = str_pad($key，$blocksize，chr(0x 00))；

$ipad = str_repeat(chr(0x36)，$ blocksize)；

$opad = str_repeat(chr(0x5c)，$ blocksize)；

$hmac = pack(

H* '，$hashfunc(

($ base $ opad). Packaging (

H* '，$hashfunc(

($ base $ ipad). $str

)

)

)

);

$ signature = base64 _ encode($ hmac)；

}

return $ signature

}