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https://github.com/sigmasternchen/php-doc-en
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git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@183141 c90b9560-bf6c-de11-be94-00142212c4b1
110 lines
3.3 KiB
XML
110 lines
3.3 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision: 1.8 $ -->
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<!-- splitted from ./en/functions/mysql.xml, last change in rev 1.2 -->
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<refentry id="function.mysql-db-query">
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<refnamediv>
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<refname>mysql_db_query</refname>
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<refpurpose>Send a MySQL query</refpurpose>
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</refnamediv>
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<refsect1>
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<title>Description</title>
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<methodsynopsis>
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<type>resource</type><methodname>mysql_db_query</methodname>
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<methodparam><type>string</type><parameter>database</parameter></methodparam>
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<methodparam><type>string</type><parameter>query</parameter></methodparam>
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<methodparam choice="opt"><type>resource</type><parameter>link_identifier</parameter></methodparam>
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</methodsynopsis>
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<para>
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Returns a positive MySQL result resource to the query result,
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or &false; on error. The function also returns &true;/&false; for
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<literal>INSERT</literal>/<literal>UPDATE</literal>/<literal>DELETE</literal>
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queries to indicate success/failure.
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</para>
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<note>
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<para>
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This function has been deprecated since PHP 4.0.6.
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Do not use this function. Use <function>mysql_select_db</function>
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and <function>mysql_query</function> instead.
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</para>
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</note>
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<para>
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<function>mysql_db_query</function> selects a database and
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executes a query on it. If the optional link identifier isn't
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specified, the function will try to find an open link to the
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MySQL server and if no such link is found it'll try to create one
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as if <function>mysql_connect</function> was called with no
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arguments.
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</para>
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<para>
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Be aware that this function does <emphasis role="strong">NOT</emphasis>
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switch back to the database you were connected before. In other words,
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you can't use this function to <emphasis>temporarily</emphasis> run a
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sql query on another database, you would have to manually switch back.
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Users are strongly encouraged to use the
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<literal>database.table</literal> syntax in their sql queries or
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<function>mysql_select_db</function> instead of this function.
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</para>
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<para>
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<example>
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<title><function>mysql_db_query</function> alternative example</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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if (!$link = mysql_connect('mysql_host', 'mysql_user', 'mysql_password')) {
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echo 'Could not connect to mysql';
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exit;
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}
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if (!mysql_select_db('mysql_dbname', $link)) {
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echo 'Could not select database';
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exit;
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}
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$sql = 'SELECT foo FROM bar WHERE id = 42';
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$result = mysql_query($sql, $link);
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if (!$result) {
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echo "DB Error, could not query the database\n";
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echo 'MySQL Error: ' . mysql_error();
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exit;
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}
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while ($row = mysql_fetch_assoc($result)) {
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echo $row['foo'];
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}
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mysql_free_result($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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<para>
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See also <function>mysql_connect</function> and
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<function>mysql_query</function>.
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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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