mirror of
https://github.com/sigmasternchen/php-doc-en
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git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@141299 c90b9560-bf6c-de11-be94-00142212c4b1
73 lines
2.6 KiB
XML
73 lines
2.6 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision: 1.6 $ -->
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<refentry id="function.sqlite-escape-string">
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<refnamediv>
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<refname>sqlite_escape_string</refname>
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<refpurpose>Escapes a string for use as a query parameter</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>string</type><methodname>sqlite_escape_string</methodname>
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<methodparam><type>string</type><parameter>item</parameter></methodparam>
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</methodsynopsis>
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<para>
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<function>sqlite_escape_string</function> will correctly quote the string
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specified by <parameter>item</parameter>
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for use in an SQLite SQL statement. This includes doubling up
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single-quote characters (<literal>'</literal>) and checking for
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binary-unsafe characters in the query string.
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</para>
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<para>
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If the <parameter>item</parameter> contains a <literal>NUL</literal>
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character, or if it begins with a character whose ordinal value is
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<literal>0x01</literal>, PHP will apply a binary encoding scheme so that
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you can safely store and retrieve binary data.
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</para>
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<para>
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Although the encoding makes it safe to insert the data, it will render
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simple text comparisons and <literal>LIKE</literal> clauses in your
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queries unusable for the columns that contain the binary data. In
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practice, this shouldn't be a problem, as your schema should be such that
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you don't use such things on binary columns (in fact, it might be better to
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store binary data using other means, such as in files).
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</para>
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<warning>
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<simpara>
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<function>addslashes</function> should <emphasis>NOT</emphasis> be used to
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quote your strings for SQLite queries; it will lead to strange results
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when retrieving your data.
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</simpara>
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</warning>
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<note>
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<simpara>
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Do not use this function to encode the return values from UDF's created
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using <function>sqlite_create_function</function> or
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<function>sqlite_create_aggregate</function> - use
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<function>sqlite_udf_encode_binary</function> instead.
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</simpara>
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</note>
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<para>
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See also <function>sqlite_udf_encode_binary</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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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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