Уроки php

$rs=ibase_query("SELECT * FROM tablename"); 
$coln = ibase_num_fields($rs);
for ($i=0; $i < $coln; $i++) {
$col_info = ibase_field_info($rs, $i); 
echo "name: ".$col_info['name']."\n"; 
echo "alias: ".$col_info['alias']."\n"; 
echo "relation: ".$col_info['relation']."\n"; 
echo "length: ".$col_info['length']."\n"; 
echo "type: ".$col_info['type']."\n"; 
}