pg_num_fields

(PHP 4 >= 4.2.0, PHP 5)

pg_num_fieldsReturns the number of fields in a result

Description

int pg_num_fields ( resource $result )

pg_num_fields() returns the number of fields (columns) in a PostgreSQL result resource.

Note:

This function used to be called pg_numfields().

Parameters

result

PostgreSQL query result resource, returned by pg_query(), pg_query_params() or pg_execute() (among others).

Return Values

The number of fields (columns) in the result. On error, -1 is returned.

Examples

Example #1 pg_num_fields() example

<?php
$result 
pg_query($conn"SELECT 1, 2");

$num pg_num_fields($result);

echo 
$num " field(s) returned.\n";
?>

The above example will output:

2 field(s) returned.

See Also

Коментарии

Here is a simple example for using pg_num_feilds, pg_num_rows and pg_result together.  I'm simply SELECTing * from a table named markie on the current pg_connect(). 

<?php
    $pgsql_conn 
pg_connect("dbname=mark host=localhost");

    if (!
$pgsql_conn) {
        print 
pg_last_error($pgsql_conn);
        exit;
    }

   
$results pg_query($pgsql_conn"SELECT * FROM markie");

    echo 
"<table border=1>\n";
    for(
$lt 0$lt pg_num_rows($results); $lt++) {
        echo 
"<tr>\n";
        for(
$gt 0$gt pg_num_fields($results); $gt++) {
            echo 
"<td>" pg_result($results$lt$gt) . "</td>\n";
        }
        echo 
"</tr>\n";
    }
    echo 
"</table>\n";

   
pg_close($pgsql_conn);
?>

This code snippet will print out the rows and columns into a HTML table.

Regards,  --mark
2003-03-24 15:02:01
http://php5.kiev.ua/manual/ru/function.pg-num-fields.html

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