PHP: fbsql_fetch_field

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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