genphp

Hey all!

To say I **** at regex is an understatement so really need any help I can get on this, I have a page of text with different html tags in them, but each "block" of text has a <p> or a < class="something"> tag... anybody have any regex that will catch each of these paragraphs and put then into an array
example:
array[0]="<p> first block </p>";
array[1]="<p class="blah"> block X</p>";

Thanks!
R


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eric.butera

If you're using php5 you can use DOM's getElementsByTagName.

If you still think you need to do some sort of regex it is possible
but it will be buggy at best.

genphp

<clip>

If you're using php5 you can use DOM's getElementsByTagName.

If you still think you need to do some sort of regex it is possible
but it will be buggy at best.


</clip>

Nope, need a regex... guess I have no choice, either chancy regex or nothing... I know for a fact that the first paragraph tag wont contain a class, and for the <p> tags that contain a class="blah" does it matter that i know exactly what the classname is?

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aschwin

Hi,

Maybe the example is overkill, but I give you a quick setup that can
save you some time finding HTML tags with a certain attribute.

<?php
$html = <<<END_OF_HTML
<b>hello</b>
<b class="blah">hello</b>
<p>hello</p>
<p class="blah">hello</p>
<a>hello</a>
<a href="url">hello</a>
END_OF_HTML;

$tags = array();
$tags[] = 'p';
$tags[] = 'a';

$tags = implode('|', $tags);
$pattern = '/<('.$tags.')[^>]*>/i';

echo $pattern."\n";

preg_match_all($pattern, $html, $matches); var_dump($matches);
?>

I'm not an expression guru either, but I think it works OK. I had to
find 'link', 'img', 'a' and other tags in HTML and used a more complex
expression for it which worked like a charm.

It's just an example. For you, you have to leave away the 'a' tag in the
$tags array, to get what you want.

Hope it helps!
--

Aschwin Wesselius

/'What you would like to be done to you, do that to the other....'/

aschwin

Hi,

I'm sorry. I didn't read your request properly. Below you'll have a
correct solution:

<?php
$html = <<<END_OF_HTML
<b>hello</b>
<b class="blah">hello</b>
<p>hello</p>
<p class="blah">hello</p>
<a>hello</a>
<a href="url">this</a>
<a>hello</a>
<a href="regex yo">hello</a>
<a>hello</a>
<a id="2" href="regex yo">hello</a>
<p>that</p>
<p class="blah" title="whatever">hello</p>
END_OF_HTML;

$tags = array();
$tags[] = 'p';
$tags[] = 'a';

$attr = array();
$attr[] = 'class';
$attr[] = 'href';

$vals = array();
$vals[] = 'blah';
$vals[] = 'url';
$vals[] = 'yo';

$text = array();
$text[] = 'hello';
$text[] = 'this';
$text[] = 'that';

$tags = implode('|', $tags);
$attr = implode('|', $attr);
$vals = implode('|', $vals);
$text = implode('|', $text); $pattern =
'/<('.$tags.')[^>]*('.$attr.')[^>]*('.$vals.')[^>]*>('.$text.')[^<\/]*<\/\1>/i';

echo $pattern."\n";
echo "--------------------\n";

preg_match_all($pattern, $html, $matches); var_dump($matches);
?>

aschwin

Hi,

It is obvious I haven't had my caffeine yet. This is my last try to get
the pattern straight:

<?php
$html = <<<END_OF_HTML
<b>hello</b>
<b class="blah">hello</b>
<p>those</p>
<p class="blah">hello</p>
<a>hello</a>
<a href="url">this</a>
<a>rose</a>
<a href="regex yo">hello</a>
<a>nose</a>
<a id="2" href="regex yo">hello</a>
<p>that</p>
<p class="blah" title="whatever">hello</p>
END_OF_HTML;

$tags = array();
$tags[] = 'p';
$tags[] = 'a';

$attr = array();
$attr[] = 'class';
$attr[] = 'href';

$vals = array();
$vals[] = 'blah';
$vals[] = 'url';
$vals[] = 'yo';

$text = array();
$text[] = 'hello';
$text[] = 'this';
$text[] = 'that';

$tags = implode('|', $tags);
$attr = implode('|', $attr);
$vals = implode('|', $vals);
$text = implode('|', $text); $pattern =
'/<('.$tags.')[^>]*('.$attr.')?[^>]*('.$vals.')?[^>]*>('.$text.')[^<\/]*<\/\1>/i';

echo $pattern."\n";
echo "--------------------\n";

preg_match_all($pattern, $html, $matches); var_dump($matches);
?>
--

Aschwin Wesselius

/'What you would like to be done to you, do that to the other....'/

Or you could simplify and just do this:

$html = <<<END_OF_HTML
<b>hello</b>
<b class="blah">hello</b>
<p>those</p>
<p class="blah">hello</p>
<a>hello</a>
<a href="url">this</a>
<a>rose</a>
<a href="regex yo">hello</a>
<a>nose</a>
<a id="2" href="regex yo">hello</a>
<p>that</p>
<p class="blah" title="whatever">hello</p>
END_OF_HTML;

// This will give you any tag
preg_match_all("/<[\s\S]*?>*?<\/[\s\S]*?>/", $html, $matches);
print_r($matches);

// This will give you any p tag
preg_match_all("/<p[\s\S]*?>*?<\/p[\s\S]*?>/", $html, $matches);
print_r($matches);

nospam

preg_match_all('|<p[^>]*>(.*)</p>|Ui', $myText, $myArray);

s4nnym

$tag_regex=array(
'/\<p(\s*)\>(.*?)\<\/p\> /si' => "$1",
'/\<(\s*)(*.?)class\=(*.?)\>(.*?)\<\/(*.?)\>/si' => "$3"
);

$paragraphs=preg_replace(array_keys($tag_regex),ar ray_values($tag_regex),$page);

I am not sure what tag is that you mean on <class="something">, but in this
RE .. it should capture any <p> tags (the first element of the array) and
any tags (the second element of the array) that has attribute class on it.

You can find another example of this kind of HTML parsing in the PHP... try
googling it..

HTH


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