<?php
$userinfo = "Name: <b>PHP</b> <br> Title: <b>Programming Language</b>";
preg_match_all ("/<b>(.*)<\/b>/U", $userinfo, $pat_array);
print_r($pat_array[0]);
?>執行結果如下所示：
Array
(
[0] => <b>PHP</b>
[1] => <b>Programming Language</b>
)查找匹配的HTML標籤（貪婪）：
<?php
//\\2是一個後向引用的示例. 這會告訴pcre它必須匹配正則表達式中第二個圓括號(這裏是([\w]+))
//匹配到的結果. 這裏使用兩個反斜線是因爲這裏使用了雙引號.
$html = "<b>bold text</b><a href=howdy.html>click me</a>";
preg_match_all("/(<([\w]+)[^>]*>)(.*?)(<\/\\2>)/", $html, $matches, PREG_SET_ORDER);
foreach ($matches as $val) {
echo "matched: " . $val[0] . "\n";
echo "part 1: " . $val[1] . "\n";
echo "part 2: " . $val[2] . "\n";
echo "part 3: " . $val[3] . "\n";
echo "part 4: " . $val[4] . "\n\n";
}
?>執行結果如下所示：
matched: <b>bold text</b>
part 1: <b>
part 2: b
part 3: bold text
part 4: </b>
matched: <a href=howdy.html>click me</a>
part 1: <a href=howdy.html>
part 2: a
part 3: click me
part 4: </a>
