mirror of
https://github.com/sigmasternchen/php-doc-en
synced 2025-03-28 23:08:55 +00:00
785e3ca036
git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@143539 c90b9560-bf6c-de11-be94-00142212c4b1
344 lines
11 KiB
XML
344 lines
11 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
|
|
<!-- $Revision: 1.14 $ -->
|
|
<!-- splitted from ./en/functions/dbx.xml, last change in rev 1.3 -->
|
|
<refentry id="function.dbx-query">
|
|
<refnamediv>
|
|
<refname>dbx_query</refname>
|
|
<refpurpose>Send a query and fetch all results (if any)</refpurpose>
|
|
</refnamediv>
|
|
<refsect1>
|
|
<title>Description</title>
|
|
<methodsynopsis>
|
|
<type>object</type><methodname>dbx_query</methodname>
|
|
<methodparam><type>object</type><parameter>link_identifier</parameter></methodparam>
|
|
<methodparam><type>string</type><parameter>sql_statement</parameter></methodparam>
|
|
<methodparam choice="opt"><type>int</type><parameter>flags</parameter></methodparam>
|
|
</methodsynopsis>
|
|
<simpara>
|
|
<function>dbx_query</function> returns an object or <literal>1</literal>
|
|
on success, and <literal>0</literal> on failure. The result object is
|
|
returned only if the query given in <parameter>sql_statement</parameter>
|
|
produces a result set (i.e. a SELECT query, even if the result set is
|
|
empty).
|
|
</simpara>
|
|
<example>
|
|
<title>How to handle the returned value</title>
|
|
<programlisting role="php">
|
|
<![CDATA[
|
|
<?php
|
|
$link = dbx_connect(DBX_ODBC, "", "db", "username", "password")
|
|
or die("Could not connect");
|
|
|
|
$result = dbx_query($link, 'SELECT id, parentid, description FROM table');
|
|
|
|
if ( is_object($result) ) {
|
|
// ... do some stuff here, see detailed examples below ...
|
|
// first, print out field names and types
|
|
// then, draw a table filled with the returned field values
|
|
}
|
|
else {
|
|
exit("Query failed");
|
|
}
|
|
|
|
dbx_close($link);
|
|
?>
|
|
]]>
|
|
</programlisting>
|
|
</example>
|
|
<para>
|
|
The <parameter>flags</parameter> parameter is used to control the amount of
|
|
information that is returned. It may be any combination of the following
|
|
constants with the bitwise OR operator (|). The DBX_COLNAMES_* flags
|
|
override the dbx.colnames_case setting from &php.ini;.
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term>
|
|
<constant>DBX_RESULT_INDEX</constant>
|
|
</term>
|
|
<listitem>
|
|
<simpara>
|
|
It is <emphasis>always</emphasis> set, that is, the returned object
|
|
has a <property>data</property> property which is a 2 dimensional
|
|
array indexed numerically. For example, in the expression
|
|
<literal>data[2][3]</literal> <literal>2</literal> stands for the row
|
|
(or record) number and <literal>3</literal> stands for the column
|
|
(or field) number. The first row and column are indexed at 0.
|
|
</simpara>
|
|
<simpara>
|
|
If <constant>DBX_RESULT_ASSOC</constant> is also specified, the
|
|
returning object contains the information related to
|
|
<constant>DBX_RESULT_INFO</constant> too, even if it was not specified.
|
|
</simpara>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term>
|
|
<constant>DBX_RESULT_INFO</constant>
|
|
</term>
|
|
<listitem>
|
|
<simpara>
|
|
It provides info about columns, such as field names and field types.
|
|
</simpara>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term>
|
|
<constant>DBX_RESULT_ASSOC</constant>
|
|
</term>
|
|
<listitem>
|
|
<simpara>
|
|
It effects that the field values can be accessed with the respective
|
|
column names used as keys to the returned object's
|
|
<property>data</property> property.
|
|
</simpara>
|
|
<simpara>
|
|
Associated results are actually references to the numerically indexed
|
|
data, so modifying <literal>data[0][0]</literal> causes that
|
|
<literal>data[0]['field_name_for_first_column']</literal> is modified
|
|
as well.
|
|
</simpara>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term>
|
|
<constant>DBX_RESULT_UNBUFFERED</constant> (CVS only)
|
|
</term>
|
|
<listitem>
|
|
<simpara>
|
|
This flag will not create the <property>data</property> property, and
|
|
the <property>rows</property> property will initially be 0. Use this
|
|
flag for large datasets, and use <function>dbx_fetch_row</function> to
|
|
retrieve the results row by row.
|
|
</simpara>
|
|
<simpara>
|
|
The <function>dbx_fetch_row</function> function will return rows that
|
|
are conformant to the flags set with this query. Incidentally, it will
|
|
also update the <property>rows</property> each time it is called.
|
|
</simpara>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term>
|
|
<constant>DBX_COLNAMES_UNCHANGED</constant> (available from PHP 4.3.0)
|
|
</term>
|
|
<listitem>
|
|
<simpara>
|
|
The case of the returned column names will not be changed.
|
|
</simpara>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term>
|
|
<constant>DBX_COLNAMES_UPPERCASE</constant> (available from PHP 4.3.0)
|
|
</term>
|
|
<listitem>
|
|
<simpara>
|
|
The case of the returned column names will be changed to
|
|
uppercase.
|
|
</simpara>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term>
|
|
<constant>DBX_COLNAMES_LOWERCASE</constant> (available from PHP 4.3.0)
|
|
</term>
|
|
<listitem>
|
|
<simpara>
|
|
The case of the returned column names will be changed to
|
|
lowercase.
|
|
</simpara>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
Note that <constant>DBX_RESULT_INDEX</constant> is always used, regardless
|
|
of the actual value of <parameter>flags</parameter> parameter. This means
|
|
that only the following combinations are effective:
|
|
<itemizedlist>
|
|
<listitem>
|
|
<simpara>
|
|
<constant>DBX_RESULT_INDEX</constant>
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<constant>DBX_RESULT_INDEX</constant> |
|
|
<constant>DBX_RESULT_INFO</constant>
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<constant>DBX_RESULT_INDEX</constant> |
|
|
<constant>DBX_RESULT_INFO</constant> |
|
|
<constant>DBX_RESULT_ASSOC</constant> - this is the default, if
|
|
<parameter>flags</parameter> is not specified.
|
|
</simpara>
|
|
</listitem>
|
|
</itemizedlist>
|
|
</para>
|
|
<para>
|
|
The returned <varname>object</varname> has four or five
|
|
properties depending on <parameter>flags</parameter>:
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term>
|
|
<property>handle</property>
|
|
</term>
|
|
<listitem>
|
|
<para>
|
|
It is a valid handle for the connected database, and as such it can be
|
|
used in module specific functions (if required).
|
|
<informalexample>
|
|
<programlisting role="php">
|
|
<![CDATA[
|
|
<?php
|
|
$result = dbx_query ($link, "SELECT id FROM table");
|
|
mysql_field_len ($result->handle, 0);
|
|
?>
|
|
]]>
|
|
</programlisting>
|
|
</informalexample>
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term>
|
|
<property>cols</property> and <property>rows</property>
|
|
</term>
|
|
<listitem>
|
|
<para>
|
|
These contain the number of columns (or fields) and rows (or records)
|
|
respectively.
|
|
<informalexample>
|
|
<programlisting role="php">
|
|
<![CDATA[
|
|
<?php
|
|
$result = dbx_query ($link, 'SELECT id FROM table');
|
|
echo $result->rows; // number of records
|
|
echo $result->cols; // number of fields
|
|
?>
|
|
]]>
|
|
</programlisting>
|
|
</informalexample>
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term>
|
|
<property>info</property> (optional)
|
|
</term>
|
|
<listitem>
|
|
<simpara>
|
|
It is returned only if either <constant>DBX_RESULT_INFO</constant> or
|
|
<constant>DBX_RESULT_ASSOC</constant> is specified in the
|
|
<parameter>flags</parameter> parameter. It is a 2 dimensional array,
|
|
that has two named rows (<literal>name</literal> and
|
|
<literal>type</literal>) to retrieve column information.
|
|
</simpara>
|
|
<example>
|
|
<title>lists each field's name and type</title>
|
|
<programlisting role="php">
|
|
<![CDATA[
|
|
<?php
|
|
$result = dbx_query ($link, 'SELECT id FROM table',
|
|
DBX_RESULT_INDEX | DBX_RESULT_INFO);
|
|
|
|
for ($i = 0; $i < $result->cols; $i++ ) {
|
|
echo $result->info['name'][$i] . "\n";
|
|
echo $result->info['type'][$i] . "\n";
|
|
}
|
|
?>
|
|
]]>
|
|
</programlisting>
|
|
</example>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term>
|
|
<property>data</property>
|
|
</term>
|
|
<listitem>
|
|
<simpara>
|
|
This property contains the actual resulting data, possibly associated
|
|
with column names as well depending on <parameter>flags</parameter>.
|
|
If <constant>DBX_RESULT_ASSOC</constant> is set, it is possible to use
|
|
<literal>$result->data[2]["field_name"]</literal>.
|
|
</simpara>
|
|
<example>
|
|
<title>outputs the content of data property into HTML table</title>
|
|
<programlisting role="php">
|
|
<![CDATA[
|
|
<?php
|
|
$result = dbx_query ($link, 'SELECT id, parentid, description FROM table');
|
|
|
|
echo "<table>\n";
|
|
foreach ( $result->data as $row ) {
|
|
echo "<tr>\n";
|
|
foreach ( $row as $field ) {
|
|
echo "<td>$field</td>";
|
|
}
|
|
echo "</tr>\n";
|
|
}
|
|
echo "</table>\n";
|
|
?>
|
|
]]>
|
|
</programlisting>
|
|
</example>
|
|
<example>
|
|
<title>How to handle UNBUFFERED queries</title>
|
|
<programlisting role="php">
|
|
<![CDATA[
|
|
$result = dbx_query ($link, 'SELECT id, parentid, description FROM table', DBX_RESULT_UNBUFFERED);
|
|
|
|
echo "<table>\n";
|
|
while ( $row = dbx_fetch_row($result) ) {
|
|
echo "<tr>\n";
|
|
foreach ( $row as $field ) {
|
|
echo "<td>$field</td>";
|
|
}
|
|
echo "</tr>\n";
|
|
}
|
|
echo "</table>\n";
|
|
]]>
|
|
</programlisting>
|
|
</example>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</para>
|
|
<note>
|
|
<para>
|
|
Always refer to the module-specific documentation as well.
|
|
</para>
|
|
<para>
|
|
Column names for queries on an Oracle database are returned
|
|
in lowercase.
|
|
</para>
|
|
</note>
|
|
<para>
|
|
See also <function>dbx_escape_string</function>,
|
|
<function>dbx_fetch_row</function> and
|
|
<function>dbx_connect</function>.
|
|
</para>
|
|
</refsect1>
|
|
</refentry>
|
|
|
|
<!-- Keep this comment at the end of the file
|
|
Local variables:
|
|
mode: sgml
|
|
sgml-omittag:t
|
|
sgml-shorttag:t
|
|
sgml-minimize-attributes:nil
|
|
sgml-always-quote-attributes:t
|
|
sgml-indent-step:1
|
|
sgml-indent-data:t
|
|
indent-tabs-mode:nil
|
|
sgml-parent-document:nil
|
|
sgml-default-dtd-file:"../../../../manual.ced"
|
|
sgml-exposed-tags:nil
|
|
sgml-local-catalogs:nil
|
|
sgml-local-ecat-files:nil
|
|
End:
|
|
vim600: syn=xml fen fdm=syntax fdl=2 si
|
|
vim: et tw=78 syn=sgml
|
|
vi: ts=1 sw=1
|
|
-->
|