mirror of
https://github.com/sigmasternchen/php-doc-en
synced 2025-03-20 10:58:54 +00:00
99ed54dd15
git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@86387 c90b9560-bf6c-de11-be94-00142212c4b1
198 lines
6.4 KiB
XML
198 lines
6.4 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
|
|
<!-- $Revision: 1.5 $ -->
|
|
<!-- splitted from ./en/functions/pcre.xml, last change in rev 1.2 -->
|
|
<refentry id="function.preg-match-all">
|
|
<refnamediv>
|
|
<refname>preg_match_all</refname>
|
|
<refpurpose>Perform a global regular expression match</refpurpose>
|
|
</refnamediv>
|
|
<refsect1>
|
|
<title>Description</title>
|
|
<methodsynopsis>
|
|
<type>int</type><methodname>preg_match_all</methodname>
|
|
<methodparam><type>string</type><parameter>pattern</parameter></methodparam>
|
|
<methodparam><type>string</type><parameter>subject</parameter></methodparam>
|
|
<methodparam><type>array</type><parameter>matches</parameter></methodparam>
|
|
<methodparam choice="opt"><type>int</type><parameter>flags</parameter></methodparam>
|
|
</methodsynopsis>
|
|
<para>
|
|
Searches <parameter>subject</parameter> for all matches to the regular
|
|
expression given in <parameter>pattern</parameter> and puts them in
|
|
<parameter>matches</parameter> in the order specified by
|
|
<parameter>order</parameter>.
|
|
</para>
|
|
<para>
|
|
After the first match is found, the subsequent searches are continued
|
|
on from end of the last match.
|
|
</para>
|
|
<para>
|
|
<parameter>flags</parameter> can be a combination of the following flags
|
|
(note that it doesn't make sense to use
|
|
<constant>PREG_PATTERN_ORDER</constant> together with
|
|
<constant>PREG_SET_ORDER</constant>):
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term>PREG_PATTERN_ORDER</term>
|
|
<listitem>
|
|
<para>
|
|
Orders results so that $matches[0] is an array of full
|
|
pattern matches, $matches[1] is an array of strings matched by
|
|
the first parenthesized subpattern, and so on.
|
|
<informalexample>
|
|
<programlisting role="php">
|
|
<![CDATA[
|
|
preg_match_all ("|<[^>]+>(.*)</[^>]+>|U",
|
|
"<b>example: </b><div align=left>this is a test</div>",
|
|
$out, PREG_PATTERN_ORDER);
|
|
print $out[0][0].", ".$out[0][1]."\n";
|
|
print $out[1][0].", ".$out[1][1]."\n";
|
|
]]>
|
|
</programlisting>
|
|
<para>
|
|
This example will produce:
|
|
<screen>
|
|
<![CDATA[
|
|
<b>example: </b>, <div align=left>this is a test</div>
|
|
example: , this is a test
|
|
]]>
|
|
</screen>
|
|
So, $out[0] contains array of strings that matched full pattern,
|
|
and $out[1] contains array of strings enclosed by tags.
|
|
</para>
|
|
</informalexample>
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term>PREG_SET_ORDER</term>
|
|
<listitem>
|
|
<para>
|
|
Orders results so that $matches[0] is an array of first set
|
|
of matches, $matches[1] is an array of second set of matches,
|
|
and so on.
|
|
<informalexample>
|
|
<programlisting role="php">
|
|
<![CDATA[
|
|
preg_match_all ("|<[^>]+>(.*)</[^>]+>|U",
|
|
"<b>example: </b><div align=left>this is a test</div>",
|
|
$out, PREG_SET_ORDER);
|
|
print $out[0][0].", ".$out[0][1]."\n";
|
|
print $out[1][0].", ".$out[1][1]."\n";
|
|
]]>
|
|
</programlisting>
|
|
</informalexample>
|
|
This example will produce:
|
|
<informalexample>
|
|
<programlisting role="php">
|
|
<![CDATA[
|
|
<b>example: </b>, example:
|
|
<div align=left>this is a test</div>, this is a test
|
|
]]>
|
|
</programlisting>
|
|
</informalexample>
|
|
In this case, $matches[0] is the first set of matches, and
|
|
$matches[0][0] has text matched by full pattern, $matches[0][1]
|
|
has text matched by first subpattern and so on. Similarly,
|
|
$matches[1] is the second set of matches, etc.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term>PREG_OFFSET_CAPTURE</term>
|
|
<listitem>
|
|
<para>
|
|
If this flag is set, for every occuring match the appendant string
|
|
offset will also be returned. Note that this changes the return
|
|
value in an array where every element is an array consisting of the
|
|
matched string at offset <literal>0</literal> and it's string offset
|
|
into <parameter>subject</parameter> at offset <literal>1</literal>.
|
|
This flag is available since <literal>PHP</literal> 4.3.0 .
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</para>
|
|
<para>
|
|
If no order flag is given, <constant>PREG_PATTERN_ORDER</constant> is
|
|
assumed.
|
|
</para>
|
|
<para>
|
|
Returns the number of full pattern matches (which might be zero),
|
|
or &false; if an error occurred.
|
|
</para>
|
|
<para>
|
|
<example>
|
|
<title>Getting all phone numbers out of some text.</title>
|
|
<programlisting role="php">
|
|
<![CDATA[
|
|
preg_match_all ("/\(? (\d{3})? \)? (?(1) [\-\s] ) \d{3}-\d{4}/x",
|
|
"Call 555-1212 or 1-800-555-1212", $phones);
|
|
]]>
|
|
</programlisting>
|
|
</example>
|
|
</para>
|
|
<para>
|
|
<example>
|
|
<title>Find matching HTML tags (greedy)</title>
|
|
<programlisting role="php">
|
|
<![CDATA[
|
|
// The \\2 is an example of backreferencing. This tells pcre that
|
|
// it must match the second set of parentheses in the regular expression
|
|
// itself, which would be the ([\w]+) in this case. The extra backslash is
|
|
// required because the string is in double quotes.
|
|
$html = "<b>bold text</b><a href=howdy.html>click me</a>";
|
|
|
|
preg_match_all ("/(<([\w]+)[^>]*>)(.*)(<\/\\2>)/", $html, $matches);
|
|
|
|
for ($i=0; $i< count($matches[0]); $i++) {
|
|
echo "matched: ".$matches[0][$i]."\n";
|
|
echo "part 1: ".$matches[1][$i]."\n";
|
|
echo "part 2: ".$matches[3][$i]."\n";
|
|
echo "part 3: ".$matches[4][$i]."\n\n";
|
|
}
|
|
]]>
|
|
</programlisting>
|
|
</example>
|
|
This example will produce:
|
|
<programlisting>
|
|
<![CDATA[
|
|
matched: <b>bold text</b>
|
|
part 1: <b>
|
|
part 2: bold text
|
|
part 3: </b>
|
|
|
|
matched: <a href=howdy.html>click me</a>
|
|
part 1: <a href=howdy.html>
|
|
part 2: click me
|
|
part 3: </a>
|
|
]]>
|
|
</programlisting>
|
|
</para>
|
|
<simpara>
|
|
See also <function>preg_match</function>,
|
|
<function>preg_replace</function>,
|
|
and <function>preg_split</function>.
|
|
</simpara>
|
|
</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
|
|
-->
|