pg_num_fields

(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)

pg_num_fields — Restituisce il numero di campi

Descrizione

pg_num_fields(resource $risultato): int

pg_num_fields() restituisce il numero di campi (colonne) in un risultato PostgreSQL. L'argomento è una risorsa risultato ottenuta mediante pg_query(). Restituisce -1 in caso di errore.

Nota:
Questa funzione si chiamava pg_numfields().

Vedere anche pg_num_rows() e pg_affected_rows().

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User Contributed Notes 1 note

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mark at redbrick dot dcu dot ie ¶

21 years ago

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

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