preg_match_all不适用于html标签

Question

I am trying to receive the content of the <tbody> tag from this page .

There are only one table with only one tag <tbody> , and i want to get all rows from this table

I try to do this by this way

$page = file_get_contents('http://pk.zntu.edu.ua/fakultety-ta-napryamy-pidhotovky/derzhavne-zamovlennya-2011-bakalavr');

preg_match_all("/<tbody>(.+?)<\/tbody>/is", $page, $output_array);

var_dump($output_array);

And i receive empty arrays:

array(2) { [0]=> array(0) { } [1]=> array(0) { } }

I have tried different variants of patterns like

• " /<tbody>(.*?)<\\/tbody>/is "
• " /<tbody>.+?<\\/tbody>/is "
• " /<tbody>.*?<\\/tbody>/is "
• " /<tbody>.+<\\/tbody>/is "
• " /<tbody>.*<\\/tbody>/is "

But no one works

With PCRE and Regex Library all should be okay

I don't know what's the problem, please help

Answer 1

Your pattern it's very simple, the regex above should be fine. but I think the problem is come from file_get_contents . I just try to count number of lines in $page variable and i get this

71220

But the real code that I check by clicking into that website and copy source code then count it manually, it's about 1787 lines.

What does this mean?

It maybe means that the code that you store it in $page variable is not the same as HTML code that you see when you manually click into that website. In actually when you open one website, many thing can be occurred eg listener method is working, but in case that you download those source code directly to PHP variable some methods maybe never executed and this can make you get an incomplete HTML code.

Note that the another evidence that support my assumption is I can not even find a keyword tbody in your $page variable.

Answer 2

tbody tag may also contain attributes. So you need to match that attributes also in-order to get the content of tbody tag.

'/<tbody\b[^>]*>(.*?)<\/tbody>/is'