SQLite3Stmt::bindParam
(PHP 5 >= 5.3.0, PHP 7, PHP 8)
SQLite3Stmt::bindParam — Binds a parameter to a statement variable
Beschreibung
Binds a parameter to a statement variable.
Before PHP 7.2.14 and 7.3.0, respectively, SQLite3Stmt::reset() must be called after the first call to SQLite3Stmt::execute() if the bound value should be properly updated on following calls to SQLite3Stmt::execute(). If SQLite3Stmt::reset() is not called, the bound value will not change, even if the value assigned to the variable passed to SQLite3Stmt::bindParam() has changed, or SQLite3Stmt::bindParam() has been called again.
Parameter-Liste
-
param -
Either a string (for named parameters) or an int (for positional parameters) identifying the statement variable to which the value should be bound. If a named parameter does not start with a colon (
:) or an at sign (@), a colon (:) is automatically preprended. Positional parameters start with1. -
var -
The parameter to bind to a statement variable.
-
type -
The data type of the parameter to bind.
-
SQLITE3_INTEGER: The value is a signed integer, stored in 1, 2, 3, 4, 6, or 8 bytes depending on the magnitude of the value. -
SQLITE3_FLOAT: The value is a floating point value, stored as an 8-byte IEEE floating point number. -
SQLITE3_TEXT: The value is a text string, stored using the database encoding (UTF-8, UTF-16BE or UTF-16-LE). -
SQLITE3_BLOB: The value is a blob of data, stored exactly as it was input. -
SQLITE3_NULL: The value is a NULL value.
As of PHP 7.0.7, if
typeis omitted, it is automatically detected from the type of thevar: bool and int are treated asSQLITE3_INTEGER, float asSQLITE3_FLOAT, null asSQLITE3_NULLand all others asSQLITE3_TEXT. Formerly, iftypehas been omitted, it has defaulted toSQLITE3_TEXT.Hinweis:
If
varisnull, it is always treated asSQLITE3_NULL, regardless of the giventype. -
Rückgabewerte
Returns true if the parameter is bound to the statement variable, false
on failure.
Changelog
| Version | Beschreibung |
|---|---|
| 7.4.0 |
param now also supports the @param
notation.
|
Beispiele
Beispiel #1 SQLite3Stmt::bindParam() Usage
This example shows how a single prepared statement with a single parameter binding can be used to insert multiple rows with different values.
<?php
$db = new SQLite3(':memory:');
$db->exec("CREATE TABLE foo (bar TEXT)");
$stmt = $db->prepare("INSERT INTO foo VALUES (:bar)");
$stmt->bindParam(':bar', $bar, SQLITE3_TEXT);
$bar = 'baz';
$stmt->execute();
$bar = 42;
$stmt->execute();
$res = $db->query("SELECT * FROM foo");
while (($row = $res->fetchArray(SQLITE3_ASSOC))) {
var_dump($row);
}
?>
Das oben gezeigte Beispiel erzeugt folgende Ausgabe:
array(1) {
["bar"]=>
string(3) "baz"
}
array(1) {
["bar"]=>
string(2) "42"
}
Siehe auch
- SQLite3Stmt::bindValue() - Binds the value of a parameter to a statement variable
- SQLite3::prepare() - Bereitet eine SQL-Anweisung für die Ausführung vor
