mcrypt_get_iv_size

(PHP 4 >= 4.0.2, PHP 5, PHP 7 < 7.2.0, PECL mcrypt >= 1.0.0)

mcrypt_get_iv_size — 锟斤拷锟斤拷指锟斤拷锟姐法/模式锟斤拷系某锟绞硷拷锟斤拷锟斤拷锟叫�

Warning

This function has been DEPRECATED as of PHP 7.1.0. Relying on this function is highly discouraged.

说锟斤拷

mcrypt_get_iv_size ( string $cipher , string $mode ) : int

锟斤拷取锟斤拷 cipher/mode 锟斤拷锟斤拷指锟斤拷锟侥筹拷始锟斤拷锟斤拷锟斤拷小锟斤拷

mcrypt_enc_get_iv_size() 锟斤拷锟斤拷锟斤拷锟矫ｏ拷 锟斤拷为锟斤拷使锟斤拷锟斤拷 mcrypt_module_open() 锟斤拷锟截碉拷锟斤拷源锟斤拷为锟斤拷锟斤拷锟斤拷

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cipher

MCRYPT_ciphername 锟斤拷锟斤拷锟叫碉拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟街凤拷锟斤拷值锟斤拷锟姐法锟斤拷锟狡★拷

mode

MCRYPT_MODE_modename 锟斤拷锟斤拷锟叫碉拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟街凤拷锟斤拷锟叫碉拷一锟斤拷锟斤拷"ecb"锟斤拷"cbc"锟斤拷"cfb"锟斤拷"ofb"锟斤拷"nofb" 锟斤拷 "stream"锟斤拷

锟斤拷锟斤拷 ECB 模式锟斤拷使锟矫筹拷始锟斤拷锟斤拷锟斤拷锟斤拷锟皆伙拷锟斤拷锟斤拷锟斤拷锟� 锟节硷拷锟杰和斤拷锟杰的癸拷锟斤拷锟叫ｏ拷 锟斤拷锟斤拷要使锟斤拷锟斤拷同锟侥筹拷始锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷桑锟斤拷锟绞硷拷悖╋拷锟�

锟斤拷锟斤拷值

锟斤拷锟截筹拷始锟斤拷锟斤拷锟侥达拷小锟斤拷锟斤拷锟街斤拷为锟斤拷位锟斤拷 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷螅锟斤拷锟� FALSE锟斤拷 锟斤拷锟街革拷锟斤拷锟斤拷惴�/模式锟斤拷锟斤拷要锟斤拷始锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷 0锟斤拷

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Example #1 mcrypt_get_iv_size() 锟斤拷锟斤拷

<?php
    echo mcrypt_get_iv_size(MCRYPT_CAST_256, MCRYPT_MODE_CFB) . "\n";

    echo mcrypt_get_iv_size('des', 'ecb') . "\n";
?>

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