<div id="main">
<!-- begin rs -->
<p>host:<!-- rs.host -->,user:<!-- rs.user --></p>
<!-- end rs -->
</div>
----------------------------------------------------------preg_match_all取<!-- begin rs --><!-- end rs -->中间<p></p>的这一整行
<!-- begin rs -->
<p>host:<!-- rs.host -->,user:<!-- rs.user --></p>
<!-- end rs -->
</div>
----------------------------------------------------------preg_match_all取<!-- begin rs --><!-- end rs -->中间<p></p>的这一整行
/<!-- begin rs -->([\s\S]*?)<!-- end rs -->/
$html='
<div id="main">
<!-- begin rs -->
<p>host:<!-- rs.host -->,user:<!-- rs.user --></p>
<!-- end rs -->
</div>';
preg_match_all('/(?<=<\!-- begin rs -->)(?:\s*).*(?:\s*)/',$html,$array);
var_dump($array);/*
array(1) {
[0]=>
array(1) {
[0]=>
string(54) "
<p>host:<!-- rs.host -->,user:<!-- rs.user --></p>
"
}
}
*/
<p>host:<!-- rs.host -->,user:<!-- rs.user --></p>[[email protected] php_project]$ cat main.php
<?php
$str = <<<EOF
<div id="main">
<!-- begin rs -->
<p>host:<!-- rs.host -->,user:<!-- rs.user --></p>
<!-- end rs -->
</div>
EOF;$n = preg_match('/<!-- begin rs -->(.*?)<!-- end rs -->/is', $str, $matches);
if ($n) {
echo trim($matches[1]);
}
?>