fbsql_fetch_field
(PHP 4 >= 4.0.6, PHP 5)
fbsql_fetch_field --
Get column information from a result and return as an object
说明
object
fbsql_fetch_field ( resource result [, int field_offset] )
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
例子 1. 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);
?>
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See also fbsql_field_seek().