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<?xml version='1.0' encoding="utf-8"?>
<!-- $Revision: 297078 $ -->
<refentry xml:id="pdostatement.debugdumpparams" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>PDOStatement->debugDumpParams</refname>
<refpurpose>
Dump a SQL prepared command
</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>bool</type><methodname>PDOStatement::debugDumpParams</methodname>
<void />
</methodsynopsis>
<para>
Dumps the informations contained by a prepared statement directly on the
output. It will provide the <literal>SQL</literal> query in use, the
number of parameters used (<literal>Params</literal>), the list
of parameters, with their name, type (<literal>paramtype</literal>) 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).
</para>
<para>
This is a debug function, which dump directly the data on the normal
output.
&tip.ob-capture;
</para>
<para>
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.
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
&return.void;
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<example>
<title><function>PDOStatement::debugDumpParams</function> example with named parameters</title>
<programlisting role='php'>
<![CDATA[
<?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();
?>
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
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
]]>
</screen>
</example>
<example>
<title><function>PDOStatement::debugDumpParams</function> example with unnamed parameters</title>
<programlisting role='php'>
<![CDATA[
<?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();
?>
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
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
]]>
</screen>
</example>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>PDO::prepare</function></member>
<member><function>PDOStatement::bindParam</function></member>
<member><function>PDOStatement::bindValue</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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