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(PECL gnupg >= 0.1)
gnupg_sign — Signs a given text
Signs the given plaintext with the keys, which were
set with gnupg_addsignkey before and
returns the signed text or the signature, depending on what was set with
gnupg_setsignmode.
identifiergnupg 标识符，由对 gnupg_init() 或 gnupg 的调用生成。
plaintextThe plain text being signed.
On success, this function returns the signed text or the signature.
On failure, this function returns false.
示例 #1 Procedural gnupg_sign() example
<?php
$res = gnupg_init();
gnupg_addsignkey($res,"8660281B6051D071D94B5B230549F9DC851566DC","test");
$signed = gnupg_sign($res, "just a test");
echo $signed;
?>示例 #2 OO gnupg_sign() example
<?php
$gpg = new gnupg();
$gpg->addsignkey("8660281B6051D071D94B5B230549F9DC851566DC","test");
$signed = $gpg->sign("just a test");
echo $signed;
?>