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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.13 $ -->
<refentry id="function.mysqli-stmt-bind-param">
<refnamediv>
<refname>mysqli_stmt_bind_param</refname>
<refname>stmt->bind_param</refname>
<refpurpose>Binds variables to a prepared statement as parameters</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<para>Procedural style:</para>
<methodsynopsis>
<type>bool</type><methodname>mysqli_stmt_bind_param</methodname>
<methodparam><type>mysqli_stmt</type><parameter>stmt</parameter></methodparam>
<methodparam><type>string</type><parameter>types</parameter></methodparam>
<methodparam><type>mixed</type><parameter role="reference">var1</parameter></methodparam>
<methodparam choice="opt"><type>mixed</type><parameter role="reference">...</parameter></methodparam>
</methodsynopsis>
<para>Object oriented style (method):</para>
<classsynopsis>
<ooclass><classname>mysqli_stmt</classname></ooclass>
<methodsynopsis>
<type>bool</type><methodname>bind_param</methodname>
<methodparam><type>string</type><parameter>types</parameter></methodparam>
<methodparam><type>mixed</type><parameter role="reference">var1</parameter></methodparam>
<methodparam choice="opt"><type>mixed</type><parameter role="reference">...</parameter></methodparam>
</methodsynopsis>
</classsynopsis>
<para>
<function>mysqli_stmt_bind_param</function> is used to bind variables for the
parameter markers in the SQL statement that was passed to
<function>mysqli_prepare</function>.
The string <parameter>types</parameter> contains one or more characters which specify
the types for the corresponding bind variables
<table>
<title>Type specification chars</title>
<tgroup cols='2'>
<thead>
<row>
<entry>Character</entry>
<entry>Description</entry>
</row>
</thead>
<tbody>
<row>
<entry>i</entry>
<entry>corresponding variable has type integer</entry>
</row>
<row>
<entry>d</entry>
<entry>corresponding variable has type double</entry>
</row>
<row>
<entry>s</entry>
<entry>corresponding variable has type string</entry>
</row>
<row>
<entry>b</entry>
<entry>corresponding variable is a blob and will be sent in packets</entry>
</row>
</tbody>
</tgroup>
</table>
</para>
<note>
<para>
If data size of a variable exceeds max. allowed packet size
(max_allowed_packet), you have to specify <literal>b</literal> in
<parameter>types</parameter> and use
<function>mysqli_stmt_send_long_data</function> to send the data in packets.
</para>
<para>
The number of variables and length of
string <parameter>types</parameter> must match the parameters in the statement.
</para>
</note>
</refsect1>
<refsect1>
&reftitle.returnvalues;
<para>
&return.success;
</para>
</refsect1>
<refsect1>
&reftitle.seealso;
<para>
<function>mysqli_stmt_bind_result</function>,
<function>mysqli_stmt_execute</function>,
<function>mysqli_stmt_fetch</function>,
<function>mysqli_prepare</function>,
<function>mysqli_stmt_send_long_data</function>,
<function>mysqli_stmt_errno</function>&listendand;
<function>mysqli_stmt_error</function>.
</para>
</refsect1>
<refsect1>
&reftitle.examples;
<example>
<title>Object oriented style</title>
<programlisting role="php">
<![CDATA[
<?php
$mysqli = new mysqli('localhost', 'my_user', 'my_password', 'world');
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
$stmt = $mysqli->prepare("INSERT INTO CountryLanguage VALUES (?, ?, ?, ?)");
$stmt->bind_param('sssd', $code, $language, $official, $percent);
$code = 'DEU';
$language = 'Bavarian';
$official = "F";
$percent = 11.2;
/* execute prepared statement */
$stmt->execute();
printf("%d Row inserted.\n", $stmt->affected_rows);
/* close statement and connection */
$stmt->close();
/* Clean up table CountryLanguage */
$mysqli->query("DELETE FROM CountryLanguage WHERE Language='Bavarian'");
printf("%d Row deleted.\n", $mysqli->affected_rows);
/* close connection */
$mysqli->close();
?>
]]>
</programlisting>
</example>
<example>
<title>Procedural style</title>
<programlisting role="php">
<![CDATA[
<?php
$link = mysqli_connect('localhost', 'my_user', 'my_password', 'world');
/* check connection */
if (!$link) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
$stmt = mysqli_prepare($link, "INSERT INTO CountryLanguage VALUES (?, ?, ?, ?)");
mysqli_stmt_bind_param($stmt, 'sssd', $code, $language, $official, $percent);
$code = 'DEU';
$language = 'Bavarian';
$official = "F";
$percent = 11.2;
/* execute prepared statement */
mysqli_stmt_execute($stmt);
printf("%d Row inserted.\n", mysqli_stmt_affected_rows($stmt));
/* close statement and connection */
mysqli_stmt_close($stmt);
/* Clean up table CountryLanguage */
mysqli_query($link, "DELETE FROM CountryLanguage WHERE Language='Bavarian'");
printf("%d Row deleted.\n", mysqli_affected_rows($link));
/* close connection */
mysqli_close($link);
?>
]]>
</programlisting>
</example>
&example.outputs;
<screen>
<![CDATA[
1 Row inserted.
1 Row deleted.
]]>
</screen>
</refsect1>
</refentry>
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-->
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