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# PDOStatement::debugDumpParams

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

PDOStatement::debugDumpParams — Dump an SQL prepared command

### Descrição

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, the value, 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.

Dica

Como toda saída é normalmente enviada direto para o browser, as Funções de Controle de Output podem ser usadas para capturar o resultado e guardá-lo em uma string (por exemplo).

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.

### Valor Retornado

Não há valor retornado.

### Exemplos

Exemplo #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();
?>`

O exemplo acima irá imprimir:

    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

Exemplo #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();
?>`

O exemplo acima irá imprimir:

    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

### Veja Também

- 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

PDOStatement::columnCount
PDOStatement::errorCode
PDOStatement
PHP Manual