This function doesn't print parameter values despite the documentation says it does. See https://bugs.php.net/bug.php?id=52384 (filed back in 2010).
PDOStatement::debugDumpParams
(PHP 5 >= 5.1.0, PHP 7, PHP 8, PECL pdo >= 0.9.0)
PDOStatement::debugDumpParams — Dump an SQL prepared command
Beschreibung
public PDOStatement::debugDumpParams
(
) : bool|null
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.
Tipp
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.
Rückgabewerte
Returns null, or false in case of an error.
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();
$sth->debugDumpParams();
?>
Das oben gezeigte Beispiel erzeugt folgende Ausgabe:
SQL: [82] SELECT name, colour, calories
FROM fruit
WHERE calories < ? AND colour = ?
Params: 2
Key: Position #0:
paramno=0
name=[0] ""
is_param=1
param_type=1
Key: Position #1:
paramno=1
name=[0] ""
is_param=1
param_type=2
Changelog
| Version | Beschreibung |
|---|---|
| 7.2.0 | PDOStatement::debugDumpParams() now returns the SQL sent to the database, including the full, raw query (including the replaced placeholders with their bounded values). Note, that this will only be available if emulated prepared statements are turned on. |
Siehe auch
- PDO::prepare() - Prepares a statement for execution and returns a statement object
- PDOStatement::bindParam() - Binds a parameter to the specified variable name
- PDOStatement::bindValue() - Binds a value to a parameter
add a note
User Contributed Notes 3 notes
thefox ¶
11 years ago
mark at manngo dot net ¶
10 years ago
As noted, this doesn’t actually simply print the prepared statement with data to be executed.
For trouble shooting purposes, I find the following useful:
<?php
function parms($string,$data) {
$indexed=$data==array_values($data);
foreach($data as $k=>$v) {
if(is_string($v)) $v="'$v'";
if($indexed) $string=preg_replace('/\?/',$v,$string,1);
else $string=str_replace(":$k",$v,$string);
}
return $string;
}
// Index Parameters
$string='INSERT INTO stuff(name,value) VALUES (?,?)';
$data=array('Fred',23);
// Named Parameters
$string='INSERT INTO stuff(name,value) VALUES (:name,:value)';
$data=array('name'=>'Fred','value'=>23);
print parms($string,$data);
?>
Lucas ¶
8 years ago
This function doesn't have a return, so if you want to do something with it you'll have to do something like
<?php
function pdo_debugStrParams($stmt) {
ob_start();
$stmt->debugDumpParams();
$r = ob_get_contents();
ob_end_clean();
return $r;
}
// omitted: connect to the database and prepare a statement
echo '<pre>'.htmlspecialchars(pdo_debugStrParams($stmt)).'</pre>';
?
Source: http://stackoverflow.com/questions/22157331/something-like-debugdumpparams-in-pdo-settable-to-a-string
