Echo Elements by class Name

Question

Let's say that i have more a href elements with different class names on a page "tst.php" like this:

<a class='1' href='etc.html'>Link</a>
<a class='2' href='etc.html'>Link</a>
<a class='3' href='etc.html'>Link</a>
<a class='4' href='etc.html'>Link</a>
<a class='5' href='etc.html'>Link</a>
<a class='1 2' href='etc.html'>Link</a>
<a class='1 4' href='etc.html'>Link</a>
<a class='5 2' href='etc.html'>Link</a>
<a class='2 3' href='etc.html'>Link</a>
<a class='2 1' href='etc.html'>Link</a>
<a class='5 2' href='etc.html'>Link</a>
<a class='5 2 6' href='etc.html'>Link</a>
<a class='5 2 6 7' href='etc.html'>Link</a>
<a class='5 2 5 7 8 9 4 6 2 6' href='etc.html'>Link</a>

i want to make a php code that will echo in another page "echo.php" onli the a href's elements that have class name 2 in their values.

Something Like this

<?php
$stream = readfile("tst.php");
$regex = "class= '2'"
preg_match_all($regex,$Text,$Match);
echo $Match all;
?>

And the echo should be only the Href's that are class named with "2":

<a class='2' href='etc.html'>Link</a>
<a class='1 2' href='etc.html'>Link</a>
<a class='5 2' href='etc.html'>Link</a>
<a class='2 3' href='etc.html'>Link</a>
<a class='5 2' href='etc.html'>Link</a>
<a class='5 2 6' href='etc.html'>Link</a>
<a class='5 2 6 7' href='etc.html'>Link</a>
<a class='5 2 5 7 8 9 4 6 2 6' href='etc.html'>Link</a>

Thanks in Advance!

Do not parse HTML with regex: http://stackoverflow.com/a/1732454/2812842 - use xpath or some other sort of built in XML/HTML parser in PHP — scrowler, Feb 20 '14 at 21:27
is esear for my to have access to tst.php amd make changes. and the echo.php just showing my changes! — user3329634, Feb 20 '14 at 21:31

score 3 · Accepted Answer · edited May 23 '17 at 12:20

3

You shouldn't use regular expressions for parsing HTML. You should use tools designed for this like DomDocument. Here's a basic example:

<?php
$dom = new DOMDocument();
@$dom->loadHTML($string_with_html);
$anchors = $dom->getElementsByTagName('a');
foreach($anchors as $anchor) {
    $class = $anchor->getAttribute('class');
    if (strstr($class, '2')) {
        echo $dom->saveHTML($anchor) . "<br>\n";
    }
}

See it in action

You could also use xpath:

$dom = new DOMDocument();
@$dom->loadHTML($string_with_html);
$xpath = new DOMXpath($dom);
$anchors = $xpath->query('//a[contains(@class,"2")]');
foreach ($anchors as $anchor) {
     echo $dom->saveHTML($anchor) . "<br>\n";
}

edited May 23 '17 at 12:20

Community

1
1

answered Feb 20 '14 at 21:30

John Conde

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lets say that i need this to work olso in div elements! – user3329634 Feb 20 '14 at 21:37
This gets you most of the way there. You should be able to convert this to use DIVs easily. – John Conde Feb 20 '14 at 21:41
how to echo the result! ive tried somting but no luck. i'm new in php! – user3329634 Feb 20 '14 at 21:47
What are you trying to echo? – John Conde Feb 20 '14 at 21:50
becose i have multiple a href and i want to be able to select witch one to apear in the webpage from tst.php like a sorting procidure! – user3329634 Feb 20 '14 at 21:51
In both examples the first item in the loop will be what you need. So you can do whatever you want to that element (echo it out, modify it, etc) and then end the loop. – John Conde Feb 20 '14 at 21:53
i did echo $anchors; insted of // do something but no result! – user3329634 Feb 20 '14 at 21:57
Unfortunately I don't have all of the pieces of your code I need, or the time I need, to make a full working demo. The code I posted is 95% of what you need though. Hopefully playing with it for a bit will help you work out the remaining details. – John Conde Feb 20 '14 at 22:00
i just nedd to echo all a hrefs elemnts that have 2 as class name. – user3329634 Feb 20 '14 at 22:01
@user3329634 I've updated my answer to echo out the anchors that match – John Conde Feb 20 '14 at 23:54
how to echo only first result? – user3329634 Mar 13 '14 at 21:01

Echo Elements by class Name

1 Answers1