PDOStatement::debugDumpParams
(PHP 5 >= 5.1.0, PHP 7, PHP 8, PECL pdo >= 0.9.0)
PDOStatement::debugDumpParams — Dump an SQL prepared command
Beschreibung
Dumps the information contained by a prepared statement directly on the
output. It will provide the SQL query in use, the
number of parameters used (Params), the list
of parameters with their key name or position, their name, their position
in the query (if this is supported by the PDO driver, otherwise, it will
be -1), type (param_type) as an integer, and a boolean
value is_param.
This is a debug function, which dumps the data directly to the normal output.
Bei allem, dessen Ergebnisausgabe direkt im Browser angezeigt wird, können Sie die Funktionen zur Ausgabesteuerung verwenden. Damit lässt sich die Ausgabe dieser Funktion erfassen, und - zum Beispiel - in einem string speichern.
This will only dump the parameters in the statement at the moment of the dump. Extra parameters are not stored in the statement, and not displayed.
Parameter-Liste
Diese Funktion besitzt keine Parameter.
Rückgabewerte
Returns null, or false in case of an error.
Changelog
| Version | Beschreibung |
|---|---|
| 7.2.0 | PDOStatement::debugDumpParams() now returns the SQL sent to the database, including the full, raw query (including the replaced placeholders with their bounded values). Note, that this will only be available if emulated prepared statements are turned on. |
Beispiele
Beispiel #1 PDOStatement::debugDumpParams() example with named parameters
<?php
/* Execute a prepared statement by binding PHP variables */
$calories = 150;
$colour = 'red';
$sth = $dbh->prepare('SELECT name, colour, calories
FROM fruit
WHERE calories < :calories AND colour = :colour');
$sth->bindParam(':calories', $calories, PDO::PARAM_INT);
$sth->bindValue(':colour', $colour, PDO::PARAM_STR, 12);
$sth->execute();
$sth->debugDumpParams();
?>
Das oben gezeigte Beispiel erzeugt folgende Ausgabe:
SQL: [96] SELECT name, colour, calories
FROM fruit
WHERE calories < :calories AND colour = :colour
Params: 2
Key: Name: [9] :calories
paramno=-1
name=[9] ":calories"
is_param=1
param_type=1
Key: Name: [7] :colour
paramno=-1
name=[7] ":colour"
is_param=1
param_type=2
Beispiel #2 PDOStatement::debugDumpParams() example with unnamed parameters
<?php
/* Execute a prepared statement by binding PHP variables */
$calories = 150;
$colour = 'red';
$name = 'apple';
$sth = $dbh->prepare('SELECT name, colour, calories
FROM fruit
WHERE calories < ? AND colour = ?');
$sth->bindParam(1, $calories, PDO::PARAM_INT);
$sth->bindValue(2, $colour, PDO::PARAM_STR);
$sth->execute();
$sth->debugDumpParams();
?>
Das oben gezeigte Beispiel erzeugt folgende Ausgabe:
SQL: [82] SELECT name, colour, calories
FROM fruit
WHERE calories < ? AND colour = ?
Params: 2
Key: Position #0:
paramno=0
name=[0] ""
is_param=1
param_type=1
Key: Position #1:
paramno=1
name=[0] ""
is_param=1
param_type=2
Siehe auch
- PDO::prepare() - Prepares a statement for execution and returns a statement object
- PDOStatement::bindParam() - Binds a parameter to the specified variable name
- PDOStatement::bindValue() - Binds a value to a parameter
