Вся предоставленная на этом сервере информация собрана нами из разных источников. Если Вам кажется, что публикация каких-то документов нарушает чьи-либо авторские права, сообщите нам об этом.
preg_match_all -- Perform a global regular expression match
Description
int preg_match_all (string pattern, string subject, array matches [, int
order])
Searches subject for all matches to the regular
expression given in pattern and puts them in
matches in the order specified by
order.
After the first match is found, the subsequent searches are continued
on from end of the last match.
order can be one of two things:
PREG_PATTERN_ORDER
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.
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"
This example will produce:
<b>example: </b>, <div align=left>this is a test</div>
example: , this is a test
So, $out[0] contains array of strings that matched full pattern,
and $out[1] contains array of strings enclosed by tags.
PREG_SET_ORDER
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.
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"
This example will produce:
<b>example: </b>, example:
<div align=left>this is a test</div>, this is a test
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.
If order is not specified, it is assumed
to be PREG_PATTERN_ORDER.
Returns the number of full pattern matches, or false if
no match is found or an error occurred.
Example 1. Getting all phone numbers out of some text.
// the \\2 is an example of backreferencing. This tells pcre that
// it must match the 2nd set of parenthesis in the regular expression
// itself, which would be the ([\w]+) in this case.
$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";
}
This example will produce:
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>
