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git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@179595 c90b9560-bf6c-de11-be94-00142212c4b1
141 lines
4.1 KiB
XML
141 lines
4.1 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision: 1.7 $ -->
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<reference id="ref.dbase">
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<title>dBase Functions</title>
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<titleabbrev>dBase</titleabbrev>
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<partintro>
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<section id="dbase.intro">
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&reftitle.intro;
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<para>
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These functions allow you to access records stored in dBase-format
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(dbf) databases.
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</para>
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<para>
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dBase files are simple sequential files of fixed length records.
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Records are appended to the end of the file and delete records are
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kept until you call <function>dbase_pack</function>.
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</para>
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<para>
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The types of dBase fields available are:
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<table>
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<title>Available types of fields</title>
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<tgroup cols="3">
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<thead>
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<row>
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<entry>Field</entry>
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<entry>dBase Type</entry>
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<entry>Format</entry>
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<entry>Additional informations</entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry><literal>M</literal></entry>
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<entry>Memo</entry>
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<entry>n/a</entry>
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<entry>This type is not supported by PHP, such field will be ignored</entry>
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</row>
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<row>
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<entry><literal>D</literal></entry>
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<entry>Date</entry>
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<entry><literal>YYYYMMDD</literal></entry>
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<entry>The field length is limited to 8</entry>
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</row>
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<row>
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<entry><literal>N</literal></entry>
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<entry>Number</entry>
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<entry>A number</entry>
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<entry>
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You must declare a length and a precision (the number of digits
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after the decimal point)
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</entry>
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</row>
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<row>
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<entry><literal>C</literal></entry>
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<entry>String</entry>
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<entry>A string</entry>
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<entry>You must declare a length. When retrieving data, the string
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will be right-padded with spaces to fit the declared length.</entry>
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</row>
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<row>
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<entry><literal>L</literal></entry>
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<entry>Boolean</entry>
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<entry><literal>T</literal> or <literal>Y</literal> for &true;,
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<literal>F</literal> or <literal>N</literal> for &false;</entry>
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<entry>Stored and returned as an integer (1 or 0)</entry>
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</row>
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</tbody>
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</tgroup>
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</table>
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</para>
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<warning>
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<para>
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There is no support for indexes or memo fields. There is no
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support for locking, too. Two concurrent webserver processes
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modifying the same dBase file will very likely ruin your database.
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</para>
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<para>
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We recommend that you do not use dBase files as your production
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database. Choose any real SQL server instead; <ulink
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url="&url.mysql;">MySQL</ulink> or <ulink url="&url.pgsql;">Postgres</ulink>
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are common choices with PHP. dBase support is here to allow you to
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import and export data to and from your web database, because the
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file format is commonly understood by Windows spreadsheets and
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organizers.
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</para>
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</warning>
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</section>
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&reference.dbase.configure;
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<section id="dbase.runtime">
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&reftitle.runtime;
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&no.config;
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</section>
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<section id="dbase.resources">
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&reftitle.resources;
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&no.resource;
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</section>
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<section id="dbase.examples">
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&reftitle.examples;
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<para>
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Many examples in this reference require a dBase database. We will use
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<filename>/tmp/test.dbf</filename> that will be created in the example of
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<function>dbase_create</function>.
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</para>
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</section>
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<section id="dbase.constants">
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&reftitle.constants;
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&no.constants;
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</section>
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</partintro>
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&reference.dbase.functions;
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</reference>
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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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