pg_select

(PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8)

pg_select — Seleziona delle tuple.

Descrizione

pg_select(
    resource $connessione,
    string $nome_tabella,
    array $array_assoc,
    int $opzioni = ?
): array

pg_select() seleziona le tuple specificate da array_assoc che ha la forma campo=>valore. Se la query ha successo, restituisce un array contenente tutte le tuple e i campi che corrispondono alla condizione specificata da array_assoc. Se opzioni è specificato, pg_convert() viene applicata ad array_assoc con le opzioni date.

Example #1 pg_select

<?php 
    $db = pg_connect ('dbname=foo');
    // La riga seguente è sicura, dal momento che $_POST viene convertita automaticamente
    $rec = pg_select($db, 'post_log', $_POST);
    if ($rec) {
        echo "Record selezionati\n";
        var_dump($rec);
    }
    else {
        echo "L'utente ha inviato dati errati\n";
    }
?>

Nota:
Questa funzione è sperimentale.

Vedere anche pg_convert()

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User Contributed Notes 2 notes

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david dot tulloh at infaze dot com dot au ¶

19 years ago


Valid options are PGSQL_DML_NO_CONV, PGSQL_DML_EXEC, PGSQL_DMP_ASYNC, PGSQL_DML_STRING (pulled out of source code).

This function does not support selecting from multiple tables.  You can get around this by setting the PGSQL_DML_NO_CONV option.  This prevents the error which occurs when the function tries to convert the condition array.

I think it is also important to point out that the table_name field is not safe, particularily with the PGSQL_DML_NO_CONV option.

The arguements array field is compulsory, as documented.  What isn't so clear is that the array has to actually have some values in it, you can't do a select all.

In summary, this function is good for a very small subset of basic queries.  If you are after anything more complex you are better off with pg_query.

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-4

wietse at cj2 dot nl ¶

18 years ago


David mentioned that you can't do a Select all.
However, when executing this script:
<?php
    $conn_string = "dbname=mydb";
    $db = pg_connect($conn_string);
    $selectfields = array("imgid" => "");
    $records = pg_select($db,"mmsfiles",$selectfields);
    print_r($records);
?>
...I get this result:
Array
(
    [0] => Array
        (
            [imgid] => 1
            [file] => /home/wietse/public_html/mms/images/1.gif
            [thumb] => 
        )
    [1] => Array
        (
            [imgid] => 2
            [file] => /home/wietse/public_html/mms/images/2.gif
            [thumb] => 
        )
    [2] => Array
        (
            [imgid] => 3
            [file] => /home/wietse/public_html/mms/images/3.gif
            [thumb] => 
        )
    [3] => Array
        (
            [imgid] => 4
            [file] => /home/wietse/public_html/mms/images/4.gif
            [thumb] => 
        )
)

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