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https://github.com/sigmasternchen/php-doc-en
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c030e2adf7
- All id attributes are now xml:id - Add docbook namespace to all root elements - Replace <ulink /> with <link xlink:href /> - Minor markup fixes here and there git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@238160 c90b9560-bf6c-de11-be94-00142212c4b1
155 lines
4.1 KiB
XML
155 lines
4.1 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision: 1.17 $ -->
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<refentry xml:id="function.mysql-fetch-assoc" xmlns="http://docbook.org/ns/docbook">
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<refnamediv>
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<refname>mysql_fetch_assoc</refname>
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<refpurpose>Fetch a result row as an associative array</refpurpose>
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</refnamediv>
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<refsect1 role="description">
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&reftitle.description;
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<methodsynopsis>
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<type>array</type><methodname>mysql_fetch_assoc</methodname>
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<methodparam><type>resource</type><parameter>result</parameter></methodparam>
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</methodsynopsis>
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<para>
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Returns an associative array that corresponds to the fetched row
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and moves the internal data pointer ahead.
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<function>mysql_fetch_assoc</function> is equivalent to calling
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<function>mysql_fetch_array</function> with MYSQL_ASSOC for the
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optional second parameter. It only returns an associative array.
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</para>
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</refsect1>
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<refsect1 role="parameters">
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&reftitle.parameters;
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<para>
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<variablelist>
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&mysql.result.description;
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</variablelist>
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</para>
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</refsect1>
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<refsect1 role="returnvalues">
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&reftitle.returnvalues;
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<para>
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Returns an associative array of strings that corresponds to the fetched row, or
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&false; if there are no more rows.
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</para>
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<para>
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If two or more columns of the result have the same field names,
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the last column will take precedence. To access the other
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column(s) of the same name, you either need to access the
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result with numeric indices by using
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<function>mysql_fetch_row</function> or add alias names.
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See the example at the <function>mysql_fetch_array</function>
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description about aliases.
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</para>
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</refsect1>
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<refsect1 role="examples">
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&reftitle.examples;
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<para>
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<example>
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<title>An expanded <function>mysql_fetch_assoc</function> example</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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$conn = mysql_connect("localhost", "mysql_user", "mysql_password");
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if (!$conn) {
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echo "Unable to connect to DB: " . mysql_error();
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exit;
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}
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if (!mysql_select_db("mydbname")) {
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echo "Unable to select mydbname: " . mysql_error();
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exit;
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}
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$sql = "SELECT id as userid, fullname, userstatus
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FROM sometable
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WHERE userstatus = 1";
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$result = mysql_query($sql);
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if (!$result) {
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echo "Could not successfully run query ($sql) from DB: " . mysql_error();
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exit;
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}
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if (mysql_num_rows($result) == 0) {
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echo "No rows found, nothing to print so am exiting";
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exit;
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}
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// While a row of data exists, put that row in $row as an associative array
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// Note: If you're expecting just one row, no need to use a loop
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// Note: If you put extract($row); inside the following loop, you'll
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// then create $userid, $fullname, and $userstatus
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while ($row = mysql_fetch_assoc($result)) {
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echo $row["userid"];
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echo $row["fullname"];
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echo $row["userstatus"];
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}
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mysql_free_result($result);
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?>
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]]>
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</programlisting>
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</example>
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</para>
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</refsect1>
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<refsect1 role="notes">
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&reftitle.notes;
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<note>
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<title>Performance</title>
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<para>
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An important thing to note is that using
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<function>mysql_fetch_assoc</function> is <emphasis>not
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significantly</emphasis> slower than using
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<function>mysql_fetch_row</function>, while it
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provides a significant added value.
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</para>
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</note>
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&database.field-case;
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&database.fetch-null;
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</refsect1>
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<refsect1 role="seealso">
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&reftitle.seealso;
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<para>
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<simplelist>
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<member><function>mysql_fetch_row</function></member>
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<member><function>mysql_fetch_array</function></member>
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<member><function>mysql_data_seek</function></member>
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<member><function>mysql_query</function></member>
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<member><function>mysql_error</function></member>
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</simplelist>
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</para>
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</refsect1>
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</refentry>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"../../../../manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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-->
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