Description
array 
mcrypt_list_algorithms ( [string lib_dir])
     mcrypt_list_algorithms() is used to get an
     array of all supported algorithms in the lib_dir parameter.
    
     mcrypt_list_algorithms() takes an optional
     lib_dir parameter which specifies the directory
     where all algorithms are located. If not specifies, the value of the
     mcrypt.algorithms_dir php.ini directive is used.
    
     
| 例子 1. mcrypt_list_algorithms() Example | 
<?php$algorithms = mcrypt_list_algorithms("/usr/local/lib/libmcrypt");
 
 foreach ($algorithms as $cipher) {
 echo "$cipher<br />\n";
 }
 ?>
 | 
 
       The above example will produce a list with all supported
       algorithms in the "/usr/local/lib/libmcrypt" directory.
       |