PHP Australia Conference 2015

Examples with PDO_4D

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Examples with PDO_4DExamples PDO_4D

This basic example show how to connect, execute a query, read data and disconnect from a 4D SQL server.

Exemplo #1 Basic example with PDO_4D

<?php
$dsn 
'4D:host=localhost;charset=UTF-8';
$user 'test';
$pass 'test';

// Connection to the 4D SQL server
$db = new PDO($dsn$user$pass);

try {
    
$db->exec('CREATE TABLE test(id varCHAR(1) NOT NULL, val VARCHAR(10))');
} catch (
PDOException $e) {
    die(
"Erreur 4D : " $e->getMessage());
}
        
$db->exec("INSERT INTO test VALUES('A', 'B')");
$db->exec("INSERT INTO test VALUES('C', 'D')");
$db->exec("INSERT INTO test VALUES('E', 'F')");

$stmt $db->prepare('SELECT id, val from test');

$stmt->execute();
print_r($stmt->fetchAll());

unset(
$stmt);
unset(
$db);
?>

O exemplo acima irá imprimir:

    Array
(
    [0] => Array
        (
            [ID] => A
            [0] => A
            [VAL] => B
            [1] => B
        )

    [1] => Array
        (
            [ID] => C
            [0] => C
            [VAL] => D
            [1] => D
        )

    [2] => Array
        (
            [ID] => E
            [0] => E
            [VAL] => F
            [1] => F
        )

)

This example shows how to execute a query in 4D language, and how to read the result through PDO_4D.

Exemplo #2 Accessing 4D language from pdo_4d

Set up a 4D method, called method. Make sure in the method properties that the option Available via SQL is checked. The 4D code is the following.

C_TEXTE($0)
$0:=Version application(*);

The PHP code to use the above 4D method is :

<?php
$dsn 
'4D:host=localhost;charset=UTF-8';
$user 'test';
$pass 'test';

// Connection to the 4D server
$db = new PDO($dsn$user$pass);

$stmt $db->prepare('SELECT {FN method() AS VARCHAR } FROM _USER_SCHEMAS LIMIT 1');

$stmt->execute();
print_r($stmt->fetchAll());

unset(
$stmt);
unset(
$db);
?>

O exemplo acima irá imprimir:

(
    [0] => Array
        (
            [<expression>] => F0011140
            [0] => F0011140
        )

)

Exemplo #3 Escaping 4D table names

This examples illustrates how to escape characters in a 4D SQL query.

<?php
$dsn 
'4D:host=localhost;charset=UTF-8';
$user 'test';
$pass 'test';

// Connection to 4D server 4D
$db = new PDO($dsn$user$pass);

$objects = array('[',']','[]','][','[[',']]','[[[',']]]','TBL ]]32[23');

foreach(
$objects as $id => $object) {
    
$object str_replace(']',']]'$object);
    print 
"$object\n";
    
    
$db->exec('CREATE TABLE IF NOT EXISTS ['.$object.'](['.$object.'] FLOAT)');

    
$req "INSERT INTO [$object] ([$object]) VALUES ($id);";
    
$db->query($req);

    
$q $db->prepare("SELECT [$object] FROM [$object]");
    
$q->execute();
    
$x[] = $q->fetch(PDO::FETCH_NUM);

    
$db->exec('DROP TABLE ['.$object.'];');
}

?>

O exemplo acima irá imprimir:

[
]]
[]]
]][
[[
]]]]
[[[
]]]]]]
TBL ]]]]32[23

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