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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="pdostatement.debugdumpparams" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>PDOStatement::debugDumpParams</refname>
<refpurpose>
Dump an SQL prepared command
</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis role="PDOStatement">
<modifier>public</modifier> <type class="union"><type>bool</type><type>null</type></type><methodname>PDOStatement::debugDumpParams</methodname>
<void/>
</methodsynopsis>
<para>
Dumps the information 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 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 (<literal>param_type</literal>) as an integer, and a boolean
value <literal>is_param</literal>.
</para>
<para>
This is a debug function, which dumps the data directly to the normal
output.
&tip.ob-capture;
</para>
<para>
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.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
&no.function.parameters;
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Returns &null;, or &false; in case of an error.
</para>
</refsect1>
<refsect1 role="changelog">
&reftitle.changelog;
<para>
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
<row>
<entry>7.2.0</entry>
<entry>
<methodname>PDOStatement::debugDumpParams</methodname> 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.
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<example>
<title><methodname>PDOStatement::debugDumpParams</methodname> 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><methodname>PDOStatement::debugDumpParams</methodname> 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><methodname>PDO::prepare</methodname></member>
<member><methodname>PDOStatement::bindParam</methodname></member>
<member><methodname>PDOStatement::bindValue</methodname></member>
</simplelist>
</para>
</refsect1>
</refentry>
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sgml-shorttag:t
sgml-minimize-attributes:nil
sgml-always-quote-attributes:t
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sgml-parent-document:nil
sgml-default-dtd-file:"~/.phpdoc/manual.ced"
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-->
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