php-doc-en/reference/mysqli/functions/mysqli-stmt-bind-result.xml

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<refentry id="function.mysqli-stmt-bind-result">
 <refnamediv>
  <refname>mysqli_stmt_bind_result</refname>
  <refname>stmt->bind_result</refname>
  <refpurpose>Binds variables to a prepared statement for result storage</refpurpose>
 </refnamediv>
 <refsect1>
  <title>Description</title>
   <para>Procedural style:</para>
   <methodsynopsis>
    <type>bool</type><methodname>mysqli_stmt_bind_result</methodname>
    <methodparam><type>mysqli_stmt</type><parameter>stmt</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_result</methodname>
     <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_result</function> is used to associate (bind) columns in the result 
    set to variables. When <function>mysqli_stmt_fetch</function> is called to fetch data, the MySQL
    client/server protocol places the data for the bound columns into the specified variables
    <parameter>var1, ...</parameter>.
   </para>
   <note>
    <para>
     Note that all columns must be bound prior to calling <function>mysqli_stmt_fetch</function>.
     Depending on column types bound variables can silently change to the corresponding PHP type.
    </para>
    <para>
     A column can be bound or rebound at any time, even after a result set has been partially retrieved.
     The new binding takes effect the next time <function>mysqli_stmt_fetch</function> is called. 
    </para>
   </note>
 </refsect1>
 <refsect1>
  &reftitle.returnvalues;
  <para>
   &return.success;
  </para>
 </refsect1>
 <refsect1>
  &reftitle.seealso;
  <para>
   <function>mysqli_stmt_bind_param</function>,
   <function>mysqli_stmt_execute</function>,
   <function>mysqli_stmt_fetch</function>,
   <function>mysqli_prepare</function>,
   <function>mysqli_stmt_prepare</function>,
   <function>mysqli_stmt_init</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");

if (mysqli_connect_errno()) {
    printf("Connect failed: %s\n", mysqli_connect_error());
    exit();
}

/* prepare statement */
if ($stmt = $mysqli->prepare("SELECT Code, Name FROM Country ORDER BY Name LIMIT 5")) {
    $stmt->execute();

    /* bind variables to prepared statement */
    $stmt->bind_result($col1, $col2);

    /* fetch values */
    while ($stmt->fetch()) {
        printf("%s %s\n", $col1, $col2);
    }

    /* close statement */
    $stmt->close();
}
/* 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();
}

/* prepare statement */
if ($stmt = mysqli_prepare($link, "SELECT Code, Name FROM Country ORDER BY Name LIMIT 5")) {
    mysqli_stmt_execute($stmt);

    /* bind variables to prepared statement */
    mysqli_stmt_bind_result($stmt, $col1, $col2);

    /* fetch values */
    while (mysqli_stmt_fetch($stmt)) {
        printf("%s %s\n", $col1, $col2);
    }

    /* close statement */
    mysqli_stmt_close($stmt);
}

/* close connection */
mysqli_close($link);
?>
]]>
   </programlisting>
  </example>
  &example.outputs;
  <screen>
<![CDATA[
AFG Afghanistan
ALB Albania
DZA Algeria
ASM American Samoa
AND Andorra
]]>
  </screen>
 </refsect1>
</refentry>

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