PDOStatement::debugDumpParams

(PHP 5 >= 5.1.0, PECL pdo >= 0.9.0)

PDOStatement::debugDumpParams Dump an SQL prepared command

Description

public void PDOStatement::debugDumpParams ( void )

Dumps the informations 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 name, type (paramtype) as an integer, their key name or position, and the position in the query (if this is supported by the PDO driver, otherwise, it will be -1).

This is a debug function, which dump directly the data on the normal output.

Tip

As with anything that outputs its result directly to the browser, the output-control functions can be used to capture the output of this function, and save it in a string (for example).

This will only dumps the parameters in the statement at the moment of the dump. Extra parameters are not stored in the statement, and not displayed.

Return Values

No value is returned.

Examples

Example #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'
);
$sth->bindParam(':calories'$caloriesPDO::PARAM_INT);
$sth->bindValue(':colour'$colourPDO::PARAM_STR12);
$sth->execute();

$sth->debugDumpParams();

?>

The above example will output:

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

Example #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 = ?'
);
$sth->bindParam(1$caloriesPDO::PARAM_INT);
$sth->bindValue(2$colourPDO::PARAM_STR);
$sth->execute();

$sth->debugDumpParams();

?>

The above example will output:

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

See Also

Коментарии

Автор:
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).
2013-04-16 08:58:12
http://php5.kiev.ua/manual/ru/pdostatement.debugdumpparams.html
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);
?>
2013-10-07 04:21:24
http://php5.kiev.ua/manual/ru/pdostatement.debugdumpparams.html
Автор:
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>';
?

Sourcehttp://stackoverflow.com/questions/22157331/something-like-debugdumpparams-in-pdo-settable-to-a-string
2015-12-15 16:15:55
http://php5.kiev.ua/manual/ru/pdostatement.debugdumpparams.html

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