pg_convert

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

pg_convert — Convertit des valeurs d'un tableaux associatifs en une forme convenable pour des requêtes SQL

Description

pg_convert(
    PgSql\Connection $connection,
    string $table_name,
    array $values,
    int $flags = 0
): array|false

pg_convert() vérifie et convertit le tableau associatif values en une requête SQL valide. Pour que pg_convert() fonctionne, il faut que la table table_name existe, et contienne au moins autant de colonnes que le tableau values a d'éléments. Les noms des champs de table_name doivent correspondre aux index du tableau dans values. Retourne un tableau avec les valeurs converties en cas de succès, et sinon, false.

Note:
Les valeurs booléennes sont acceptées et convertie en booléen PostgreSQL. Les représentations de valeurs booléennes sous forme de chaînes de caractères sont également supportées. null est converti en NULL PostgreSQL.

Liste de paramètres

connection: Une instance PgSql\Connection.
table_name: Nom de la table sur pour laquelle les types seront convertis.
values: Données à être converties.
flags: Un nombre de PGSQL_CONV_IGNORE_DEFAULT, PGSQL_CONV_FORCE_NULL ou PGSQL_CONV_IGNORE_NOT_NULL, combiné.

Valeurs de retour

Un tableau des valeurs converties, ou false si une erreur survient.

Historique

Version	Description
8.1.0	Le paramètre `connection` attend désormais une instance de PgSql\Connection ; auparavant, une ressource était attendu.

Exemples

Exemple #1 Exemple avec pg_convert()

<?php 
  $dbconn = pg_connect('dbname=foo');
  
  $tmp = array(
      'auteur' => 'Joe Thackery',
      'annee' => 2005,
      'titre' => 'Ma Vie, par Joe Thackery'
  );
  
  $vals = pg_convert($dbconn, 'auteurs', $tmp);
?>

Voir aussi

pg_meta_data() - Lit les métadonnées de la table PostgreSQL
pg_insert() - Insère un tableau dans une table
pg_select() - Effectue une sélection PostgreSQL
pg_update() - Modifie les lignes d'une table
pg_delete() - Efface des lignes PostgreSQL

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User Contributed Notes 5 notes

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Anonymous ¶

20 years ago


The only options that I see are:

PGSQL_CONV_IGNORE_DEFAULT  - Do not use DEAFULT value by removing field from returned array
PGSQL_CONV_FORCE_NULL - Convert to NULL if string is null string
PGSQL_CONV_IGNORE_NOT_NULL  - Ignore NOT NULL constraints

These are constants, so don't quote them or anything.

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gorhas at gmail dot com ¶

10 years ago


There is a problem when using interval.
If in the array 
"time_pause" => '00:30:00'
and time_pause is an interval
the insert fails
pg_insert(): '00:30:00' does not match with  '^(@?[ \t]+)?((([-+]?[ \t]+)?[0-9]+(\.[0-9]*)?[ ...

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dharana at dharana dot net ¶

21 years ago


I've found "options" possible values:

PG_CONV_CHECK - check only
PG_CONV_STRICT - raise warning for non fatal error
PG_CONV_QUOTE - add quote around values for vchar, text datetime.
PG_CONV_SLASH - add slashes if it needed.
PG_CONV_NULLCHK - check values are defined for NOT NULL fields.
PG_CONV_NO_DEFAULT - ignore default value even if value is empty string.

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-1

VLroyrenn ¶

6 years ago


Another thing that's not well documented is that (as of PHP 7.0/7.1) pg_convert doesn't like non-scalar types and will fail (but not throw just emit an E_WARNING and return false) if you pass it anything other than a string or a number, including an array or something like a DateTime. If you want to insert those types, you actually have to convert those yourself.

Also, somewhat surprisingly, $table_name is not compatible with the output of pg_escape_identifier, or seemingly any other kind of escaping.

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-1

Hayley Watson ¶

7 years ago


This will only apply the appropriate escaping and such appropriate for embedding the PHP value into an SQL statement.

It does (by default) check for nulls when the column is marked NOT NULL, and it will complain about trying to convert strings for an integer column (floats will be truncated).

Beyond the barest checking of syntax, however, it does NOT verify that the given value is a legitimate value for the column type.

<?php
// Assuming smallints.smallintis a smallint (-32768..32767) type column
foreach([-1234,
    1234,
    0,
    32767,
    -32768,
    32768,  // bogus value for smallint type
    45.8,   // gets truncated to 45
    400000, // bogus value for smallint type
    ] as $smallint)
{
    $tmp = ['smallint' => $smallint];
    $vals = pg_convert($dbconn, 'smallints', ['smallint' => $smallint]);
    echo $vals['"smallint"'],"\n";  // Notice the column name is also made SQL-safe
}

// Assuming uuids.uuid is a UUID type column
foreach(['a0eebc99-9c0b-4ef8-bb6d-6bb9bd380a11',
    'A0EEBC99-9C0B-4EF8-BB6D-6BB9BD380A11',
    'a0eebc999c0b4ef8bb6d6bb9bd380a11',
    '{a0eebc99-9c0b-4ef8-bb6d-6bb9bd380a11}',
    'Invalid Not-a-UUID',
    '{a0eebc99-9c0b4ef8-bb6d6bb9-bd380a11}',
    'a0ee-bc99-9c0b-4ef8-bb6d-6bb9-bd38-0a11',
    ] as $uuid)
{
    $tmp = ['uuid' => $uuid];
    $vals = pg_convert($dbconn, 'uuids', ['uuid' => $uuid]);
    echo $vals['"uuid"'],"\n";
}

?>

All of the above data values will be "converted" - even the invalid ones - without complaint.

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