mcrypt_enc_get_block_size
  Returns the blocksize of the opened algorithm
  
 
  WarningThis function has been
DEPRECATED as of PHP 7.1.0. Relying on this function
is highly discouraged.
 
  
 
  Description
  
   int mcrypt_enc_get_block_size
    ( resource $td
   )
  
  
 
  Parameters
  
   
    
     - 
td
- 
      
       The encryption descriptor.
       
 
 
  Return Values
  
   Returns the block size of the specified algorithm in bytes.