Warning: ibase_query() [function.ibase-query]: conversion error from string "BLOB" in C:\WWW\Apache2\scripts\HelpDesk\tasks.php on line  22 

$sql_insert = 'INSERT INTO tasks(ID_USERS,TASK_DATE,TASK_TIME,TASK_BODY)
                 values('.$ENTER_USER.',\''.$_POST['edDate'].'\',\''.$_POST['edTime'].'\',\''.$_POST['txtTBody'].'\')';

 $blbText = ibase_blob_create($dbconnection);
 ibase_blob_add($blbText,$_POST['txtTBody']);
 $insert = ibase_blob_close($blbText);
 $sql_insert = 'INSERT INTO tasks(ID_USERS,TASK_DATE,TASK_TIME,TASK_BODY)
                 values('.$ENTER_USER.',\''.$_POST['edDate'].'\',\''.$_POST['edTime'].'\','.$insert.')';

 if (!($dbconnection=ibase_connect($strconnect, $connect_db_lgn, $connect_db_pwd)))
   die('...................' .  ibase_errmsg());

 $TBody_text = $_POST['txtTBody']; //для проверки...

 if (!($blbText = ibase_blob_create($dbconnection))) { echo 'НЕ создался БЛОБ';}
 if (!(ibase_blob_add($blbText,$TBody_text))) { echo 'Не добавилос  в БЛОБ'; }
 $insert = ibase_blob_close($blbText);
 $sql_insert = 'INSERT INTO tasks(ID_USERS,TASK_DATE,TASK_TIME,TASK_BODY)
                 values('.$ENTER_USER.',\''.$_POST['edDate'].'\',\''.$_POST['edTime'].'\','.$insert.')';

<?php
  $dbh = ibase_connect($host, $user, $pass);

  $blh = ibase_blob_create($dbh);
  ibase_blob_add($blh, $data);
  $blobid = ibase_blob_close($blh);

  $sql = "INSERT INTO blobtable(blobfield) VALUES (?)";
  $sth = ibase_query($dbh, $sql, $blobid);
?>