PHP正则表达式匹配HTML之间的数据

Question

i have created a regex, that actually extracts the data what i need, but it also includes ">" character, how do i get rid of it? Here's the code.

<?php

$content = file_get_contents('www.example.com');
$pattern = "/>([0-9]{2}\.[0-9]{3})/";
preg_match_all($pattern, $content, $matches);
echo $matches[0][2];

?>

and the HTML to extract from

<td style="text-align:right" class="row">23.020</td>

it gives me the "<23.020" but what i need is "23.020" i know it's a n00b question, but how do i get rid of the "<"

Answer 1

$content = '<td style="text-align:right" class="row">23.020</td>';
$pattern = "/>([0-9]{2}\.[0-9]{3})/";
preg_match_all($pattern, $content, $matches);
var_dump($matches);

will give you

array(2) {
  [0]=>
  array(1) {
    [0]=>
    string(7) ">23.020"
  }
  [1]=>
  array(1) {
    [0]=>
    string(6) "23.020"
  }
}

So simply use $matches[1][0] .

Answer 2

If you want to match something in a regex, but not capture it, then you can use an " assertion ". For your string it would be a (?<=[>]) lookbehind.

 /(?<=>)([0-9]{2}\.[0-9]{3})/

In your case however, you already have a capture group which excludes the > anchor. You just need to access the right result group then:

 echo $matches[1][2];

The [1] refers to the inner (...) parens group, whereas your [0] would return the complete match.