(PECL kadm5 >= 0.2.3)
kadm5_modify_principal — Modifies a kerberos principal with the given parameters
$handle
   , string $principal
   , array $options
   )
   Modifies a principal according to the given
   options.
  
handleA KADM5 handle.
principalThe principal.
options
       It is possible to specify several optional parameters within the
       array options. Allowed are the following options:
       KADM5_PRINC_EXPIRE_TIME,
       KADM5_PW_EXPIRATION,
       KADM5_ATTRIBUTES,
       KADM5_MAX_LIFE,
       KADM5_KVNO,
       KADM5_POLICY,
       KADM5_CLEARPOLICY,
       KADM5_MAX_RLIFE.
       KADM5_FAIL_AUTH_COUNT.
      
   Returns TRUE on success or FALSE on failure.
  
Example #1 Example of modifying principal
<?php
$handle = kadm5_init_with_password("afs-1", "GONICUS.LOCAL", "admin/admin", "password");
$attributes = KRB5_KDB_REQUIRES_PRE_AUTH;
$options = array(KADM5_PRINC_EXPIRE_TIME => 3451234,
                 KADM5_POLICY => "gonicus",
                 KADM5_ATTRIBUTES => $attributes);
kadm5_modify_principal($handle, "burbach@GONICUS.LOCAL", $options);
kadm5_destroy($handle);
?>