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Examples

Mcrypt can be used to encrypt and decrypt using the above mentioned ciphers. If you linked against libmcrypt-2.2.x, the four important mcrypt commands (mcrypt_cfb(), mcrypt_cbc(), mcrypt_ecb(), and mcrypt_ofb()) can operate in both modes which are named MCRYPT_ENCRYPT and MCRYPT_DECRYPT, respectively.

Example #1 Encrypt an input value with TripleDES under 2.2.x in ECB mode

<?php
$key 
"this is a secret key";
$input "Let us meet at 9 o'clock at the secret place.";

$encrypted_data mcrypt_ecb (MCRYPT_3DES$key$inputMCRYPT_ENCRYPT);
?>
This example will give you the encrypted data as a string in $encrypted_data.

If you linked against libmcrypt 2.4.x or 2.5.x, these functions are still available, but it is recommended that you use the advanced functions.

Example #2 Encrypt an input value with TripleDES under 2.4.x and higher in ECB mode

<?php
    $key 
"this is a secret key";
    
$input "Let us meet at 9 o'clock at the secret place.";

    
$td mcrypt_module_open('tripledes''''ecb''');
    
$iv mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
    
mcrypt_generic_init($td$key$iv);
    
$encrypted_data mcrypt_generic($td$input);
    
mcrypt_generic_deinit($td);
    
mcrypt_module_close($td);
?>
This example will give you the encrypted data as a string in $encrypted_data. For a full example see mcrypt_module_open().



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