(PHP 5 >= 5.6.0, PHP 7)
openssl_spki_export_challenge — 锟斤拷锟斤拷锟斤拷签锟斤拷锟斤拷钥锟斤拷锟斤拷战锟斤拷氐锟斤拷锟秸斤拷址锟斤拷锟�
&$spkac
) : string锟斤拷锟斤拷锟斤拷签锟斤拷锟斤拷钥锟斤拷锟斤拷战锟斤拷氐锟斤拷锟秸斤拷址锟斤拷锟�
spkac锟斤拷锟斤拷一锟斤拷锟斤拷锟矫碉拷签锟斤拷锟斤拷钥锟斤拷锟斤拷战
锟缴癸拷锟斤拷锟斤拷锟斤拷锟斤拷氐锟斤拷锟秸斤拷址锟斤拷锟斤拷锟绞э拷芊锟斤拷锟絅ULL.
锟斤拷锟� spkac 锟斤拷锟捷碉拷锟斤拷一锟斤拷锟斤拷锟斤拷锟矫的诧拷锟斤拷锟斤拷锟斤拷锟阶筹拷一锟斤拷 E_WARNING 锟斤拷锟侥达拷锟斤拷
Example #1 openssl_spki_export_challenge() 锟斤拷锟斤拷锟斤拷
锟缴癸拷锟斤拷锟斤拷取锟斤拷锟斤拷锟斤拷锟斤拷锟秸斤拷址锟斤拷锟斤拷锟绞э拷锟斤拷蚍祷锟� NULL.
<?php
$pkey = openssl_pkey_new('secret password');
$spkac = openssl_spki_new($pkey, 'challenge string');
$challenge = openssl_spki_export_challenge(preg_replace('/SPKAC=/', '', $spkac));
?>
Example #2 openssl_spki_export_challenge() 锟斤拷锟斤拷 <keygen> 元锟截的凤拷锟斤拷锟斤拷
锟斤拷 <keygen> 元锟斤拷锟叫斤拷压锟斤拷锟斤拷锟斤拷锟斤拷锟秸斤拷址锟斤拷锟斤拷锟�
<?php
$challenge = openssl_spki_export_challenge(preg_replace('/SPKAC=/', '', $_POST['spkac']));
?>
<keygen name="spkac" challenge="challenge string" keytype="RSA">