(PHP 5 >= 5.3.3, PHP 7)
openssl_cipher_iv_length — 锟斤拷取锟斤拷锟斤拷iv锟斤拷锟斤拷
$method
) : int锟斤拷取锟斤拷锟斤拷锟绞硷拷锟斤拷锟斤拷锟�(iv)锟斤拷锟饺★拷
method锟斤拷锟斤拷姆锟斤拷锟斤拷锟斤拷锟斤拷锟街碉拷榭� openssl_get_cipher_methods() 锟斤拷锟斤拷锟斤拷
锟缴癸拷锟斤拷锟斤拷锟斤拷锟斤拷锟诫长锟斤拷, 失锟杰凤拷锟斤拷 FALSE .
锟斤拷锟斤拷锟诫方锟斤拷未知时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_cipher_iv_length() 锟斤拷锟斤拷
<?php
$method = 'AES-128-CBC';
$ivlen = openssl_cipher_iv_length($method);
echo $ivlen;
?>
锟斤拷锟斤拷锟斤拷锟教碉拷锟斤拷锟斤拷锟斤拷锟斤拷冢锟�
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