pg_select

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

pg_select Seleciona registros.

Descrição

pg_select ( resource $connection , string $table_name , array $assoc_array , int $options = ? ) : array

pg_select() seleciona registros especificados por assoc_array, que contém pares do tipo campo=>valor. Para uma consulta (query) válida, retorna um array que contém todos os registros e campos que combinam com a condição especificada por assoc_array. Se options for especificado, pg_convert() será aplicada à assoc_array com as opções especificadas.

Exemplo #1 pg_select

<?php
    $db 
pg_connect('nomebd=meubanco');
    
// Isto é seguro já que $_POST é convertida automaticamente
    
$rec pg_select($bd'post_log'$_POST);
    if (
$rec) {
        echo 
"Registros selecionados\n";
        
var_dump($rec);
    }
    else {
    echo 
"O usuário deve ter inserido dados errados\n";
    }
?>

Aviso

Esta função é EXPERIMENTAL. O comportamento, seu nome e documentação podem mudar sem aviso em futuras versões do PHP. Utilize por sua própria conta e risco.

Veja também pg_convert()

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User Contributed Notes 2 notes

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2
david dot tulloh at infaze dot com dot au
18 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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