fbsql_fetch_field

Get column information from a result and return as an object (PHP 4 >= 4.0.6, PHP 5)
object fbsql_fetch_field ( resource result [, int field_offset ] )

说明

Returns an object containing field information.

fbsql_fetch_field() can be used in order to obtain information about fields in a certain query result. If the field offset isn't specified, the next field that wasn't yet retrieved by fbsql_fetch_field() is retrieved.

The properties of the object are:

  • name - column name
  • table - name of the table the column belongs to
  • max_length - maximum length of the column
  • not_null - 1 if the column cannot be NULL
  • type - the type of the column

例 613. fbsql_fetch_field() example

<?php
fbsql_connect
($host, $user, $password)
   or die(
"Could not connect");
$result = fbsql_db_query("database", "select * from table")
   or die(
"Query failed");
# get column metadata
$i = 0;
while (
$i < fbsql_num_fields($result)) {
   echo
"Information for column $i:<br />\n";
   
$meta = fbsql_fetch_field($result);
   if (!
$meta) {
       echo
"No information available<br />\n";
   }
   echo
"<pre>
max_length:   $meta->max_length
name:         $meta->name
not_null:     $meta->not_null
table:        $meta->table
type:         $meta->type
</pre>"
;
   
$i++;
}
fbsql_free_result($result);
?>

See also fbsql_field_seek().