PDOStatement::bindParam
What the bindValue() docs fail to explain without reading them _very_ carefully is that bindParam() is passed to PDO byref - whereas bindValue() isn't.
Thus with bindValue() you can do something like $stmt->bindValue(":something", "bind this"); whereas with bindParam() it will fail because you can't pass a string by reference, for example.
PDOStatement::bindValue
(PHP 5 >= 5.1.0, PECL pdo >= 1.0.0)
PDOStatement::bindValue — Associe une valeur à un paramètre
Description
bool PDOStatement::bindValue
( mixed
$parameter
, mixed $value
[, int $data_type = PDO::PARAM_STR
] )Associe une valeur à un nom correspondant ou à un point d'interrogation (comme paramètre fictif) dans la requête SQL qui a été utilisé pour préparer la requête.
Liste de paramètres
-
parameter -
Identifiant du paramètre. Pour une requête préparée utilisant les marqueurs, cela sera un nom de paramètre de la forme :nom. Pour une requête préparée utilisant les points d'interrogation (comme paramètre fictif), cela sera un tableau indexé numériquement qui commence à la position 1 du paramètre.
-
value -
La valeur à associer au paramètre.
-
data_type -
Type de données explicite pour le paramètre utilisant les constantes PDO::PARAM_*.
Valeurs de retour
Cette fonction retourne TRUE en cas de
succès ou FALSE si une erreur survient.
Exemples
Exemple #1 Exécute une requête préparée avec des marqueurs nommés
<?php
/* Exécute une requête préparée en associant des variables PHP */
$calories = 150;
$couleur = 'rouge';
$sth = $dbh->prepare('SELECT nom, couleur, calories
FROM fruit
WHERE calories < :calories AND couleur = :couleur');
$sth->bindValue(':calories', $calories, PDO::PARAM_INT);
$sth->bindValue(':couleur', $couleur, PDO::PARAM_STR);
$sth->execute();
?>
Exemple #2 Exécute une requête préparée avec des points d'interrogation comme paramètre fictif
<?php
/* Exécute une requête préparée en associant des variables PHP */
$calories = 150;
$couleur = 'rouge';
$sth = $dbh->prepare('SELECT nom, couleur, calories
FROM fruit
WHERE calories < ? AND couleur = ?');
$sth->bindValue(1, $calories, PDO::PARAM_INT);
$sth->bindValue(2, $couleur, PDO::PARAM_STR);
$sth->execute();
?>
Voir aussi
- PDO::prepare() - Prépare une requête à l'exécution et retourne un objet
- PDOStatement::execute() - Exécute une requête préparée
- PDOStatement::bindParam() - Lie un paramètre à un nom de variable spécifique
add a note
User Contributed Notes
PDOStatement::bindValue - [12 notes]
streaky at mybrokenlogic dot com ¶
5 years ago
cpd-dev ¶
3 years ago
Although bindValue() escapes quotes it does not escape "%" and "_", so be careful when using LIKE. A malicious parameter full of %%% can dump your entire database if you don't escape the parameter yourself. PDO does not provide any other escape method to handle it.
contact[at]maximeelomari.com ¶
1 year ago
This function is useful for bind value on an array. You can specify the type of the value in advance with $typeArray.
<?php
/**
* @param string $req : the query on which link the values
* @param array $array : associative array containing the values to bind
* @param array $typeArray : associative array with the desired value for its corresponding key in $array
* */
function bindArrayValue($req, $array, $typeArray = false)
{
if(is_object($req) && ($req instanceof PDOStatement))
{
foreach($array as $key => $value)
{
if($typeArray)
$req->bindValue(":$key",$value,$typeArray[$key]);
else
{
if(is_int($value))
$param = PDO::PARAM_INT;
elseif(is_bool($value))
$param = PDO::PARAM_BOOL;
elseif(is_null($value))
$param = PDO::PARAM_NULL;
elseif(is_string($value))
$param = PDO::PARAM_STR;
else
$param = FALSE;
if($param)
$req->bindValue(":$key",$value,$param);
}
}
}
}
/**
* ## EXEMPLE ##
* $array = array('language' => 'php','lines' => 254, 'publish' => true);
* $typeArray = array('language' => PDO::PARAM_STR,'lines' => PDO::PARAM_INT,'publish' => PDO::PARAM_BOOL);
* $req = 'SELECT * FROM code WHERE language = :language AND lines = :lines AND publish = :publish';
* You can bind $array like that :
* bindArrayValue($array,$req,$typeArray);
* The function is more useful when you use limit clause because they need an integer.
* */
?>
Lambdaman ¶
4 years ago
If you want to bind a null value to a database field you must use 'NULL' in quotes (for MySQL):
<?php
$stmt->bindValue(:fieldName, 'NULL');
// not
$stmt->bindValue(:fieldName, NULL);
// or
$stmt->bindValue(:fieldName, null);
?>
Using PHP's null/NULL as a value doesn't work.
ts//tpdada//art//pl ¶
6 years ago
For bind whole array at once
<?php
function PDOBindArray(&$poStatement, &$paArray){
foreach ($paArray as $k=>$v){
@$poStatement->bindValue(':'.$k,$v);
} // foreach
} // function
// example
$stmt = $dbh->prepare("INSERT INTO tExample (id,value) VALUES (:id,:value)");
$taValues = array(
'id' => '1',
'value' => '2'
); // array
PDOBindArray($stmt,$taValues);
$stmt->execute();
?>
Anonymous ¶
1 year ago
Note that the third parameter ($data_type) in the majority of cases will not type cast the value into anything else to be used in the query, nor will it throw any sort of error if the type does not match up with the value provided. This parameter essentially has no effect whatsoever except throwing an error if it is set and is not a float, so do not think that it is adding any extra level of security to the queries.
The two exceptions where type casting is performed:
- if you use PDO::PDO_PARAM_INT and provide a boolean, it will be converted to a long
- if you use PDO::PDO_PARAM_BOOL and provide a long, it will be converted to a boolean
<?php
$query = 'SELECT * FROM `users` WHERE username = :username AND `password` = ENCRYPT( :password, `crypt_password`)';
$sth= $dbh->prepare($query);
// First try passing a random numerical value as the third parameter
var_dump($sth->bindValue(':username','bob', 12345.67)); // bool(true)
// Next try passing a string using the boolean type
var_dump($sth->bindValue(':password','topsecret_pw', PDO::PARAM_BOOL)); // bool(true)
$sth->execute(); // Query is executed successfully
$result = $sth->fetchAll(); // Returns the result of the query
?>
goofiq dot no dot spam at antispam dot wp dot pl ¶
3 years ago
bindValue with data_type depend parameter name
<?php
$db = new PDO (...);
$db -> setAttribute (PDO::ATTR_STATEMENT_CLASS, array ('MY_PDOStatement ', array ($db)));
class MY_PDOStatement extends PDOStatement {
public function execute ($input = array ()) {
foreach ($input as $param => $value) {
if (preg_match ('/_id$/', $param))
$this -> bindValue ($param, $value, PDO::PARAM_INT);
else
$this -> bindValue ($param, $value, PDO::PARAM_STR);
}
return parent::execute ();
}
}
?>
nicolas dot baptiste at gmail dot com ¶
3 years ago
This actually works to bind NULL on an integer field in MySQL :
$stm->bindValue(':param', null, PDO::PARAM_INT);
nicemandan ¶
4 years ago
I've slightly altered the PDOBindArray function above so it can receive data types, which will help against injection attacks.
<?php
private function PDOBindArray(&$poStatement, &$paArray){
foreach ($paArray as $k=>$v) {
@$poStatement->bindValue($k, $v[0], $v[1]);
}
}
// the array structure should now look something like this
$inputArray = array(
':email' => array($email, PDO::PARAM_STR),
':pass' => array($pass, PDO::PARAM_INT)
);
?>
Anonymous ¶
4 years ago
PDO lacks methods to check if values can be bound to a parameter, e.g.,
if ($statement->hasParameter(':param'))
{
$statement->bindValue(':param', $value);
}
ATM you *have to know* which parameters exist in the SQL-statement. Otherwise you get an error. You cannot test for them.
joe at dsforge dot net ¶
5 years ago
note that bindParam() doesn't let you bind a table name into a prepared statement, whereas this can be done with bindValue()...
Chris L ¶
6 years ago
I'm not sure if this is intentional or not, but you can't use a placeholder more than once. I assumed (wrongly) that bindValue() would replace ALL instances of a given placeholder with a value. For example:
<?php
// $db is a PDO object
$stmt = $db->prepare
('
insert into
TableA
(
ID,
Name,
Foo
)
select
null,
:Name,
:Foo
from
TableA
where
Foo = :Foo
');
$stmt->bindValue(':Name', 'john doe');
$stmt->bindValue(':Foo', 'foo');
$stmt->execute();
?>
This apparently won't work - you must have separate :SelectFoo and :WhereFoo. I'm using PHP 5.0.4, MySQL 5.0.14, and PDO version 1.0.2.