In the following snippet, $bstr is set to some binary data, not a blob id string:
- bstr is not accepted by ibase_query
- on echoing bstr, the closing brace is NEVER printed
- strlen( bstr ) segfaults php...

--- SNIPPET START ---
<?
    $dbh = ibase_connect( "localhost:/path/to/db/db.gdb", "user", "pass" );
 
    $bid = ibase_blob_create( $dbh );
    ibase_blob_add( $bid, "alpha" );
    $bstr = ibase_blob_close( $bid );
 
    $sql = "INSERT INTO testtable values(1,$bstr)";
 
    ibase_query( $dbh, $sql );
    ibase_close( $dbh );
?> 
--- SNIPPET END ---