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Mcrypt Funkcje
PHP Manual

# mcrypt_encrypt

(PHP 4 >= 4.0.2, PHP 5)

mcrypt_encrypt — Encrypts plaintext with given parameters

### Opis

string mcrypt_encrypt ( string `$cipher` , string `$key` , string `$data` , string `$mode` [, string `$iv` ] )

Encrypts the data and returns it.

### Parametry

`cipher`

  One of the `MCRYPT_ciphername` constants, or the name of the algorithm as string.

`key`

  The key with which the data will be encrypted. If it's smaller than the required keysize, it is padded with '\0'. It is better not to use ASCII strings for keys.

  It is recommended to use the mhash functions to create a key from a string.

`data`

  The data that will be encrypted with the given `cipher` and `mode`. If the size of the data is not n * blocksize, the data will be padded with '\0'.

  The returned crypttext can be larger than the size of the data that was given by `data`.

`mode`

  One of the `MCRYPT_MODE_modename` constants, or one of the following strings: "ecb", "cbc", "cfb", "ofb", "nofb" or "stream".

`iv`

  Used for the initialization in CBC, CFB, OFB modes, and in some algorithms in STREAM mode. If you do not supply an IV, while it is needed for an algorithm, the function issues a warning and uses an IV with all its bytes set to "\0".

### Zwracane wartości

Returns the encrypted data, as a string.

### Przykłady

Przykład #1 mcrypt_encrypt() Example

`<?php
$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
$key = "This is a very secret key";
$text = "Meet me at 11 o'clock behind the monument.";
echo strlen($text) . "\n";
$crypttext = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $text, MCRYPT_MODE_ECB, $iv);
echo strlen($crypttext) . "\n";
?>`

Powyższy przykład wyświetli:

    42
    64

See also mcrypt_module_open() for a more advanced API and an example.

mcrypt_enc_self_test
mcrypt_generic_deinit
Mcrypt Funkcje
PHP Manual