(PHP 4, PHP 5, PHP 7)
ldap_error — Return the LDAP error message of the last LDAP command
$link_identifier
   ) : string
   Returns the string error message explaining the error generated by the
   last LDAP command for the given link_identifier.
   While LDAP errno numbers are standardized, different libraries return
   different or even localized textual error messages. Never check for a
   specific error message text, but always use an error number to check.
  
   Unless you lower your warning level in your php.ini sufficiently or
   prefix your LDAP commands with @ (at) characters to
   suppress warning output, the errors generated will also show up in your
   HTML output.
  
Returns string error message.