PHP ganon如何阅读javascript

Question

I am scraping some html pages using php ganon dom parser but i am stuck where i need to read some javascript from the source my javascript is like.

<script type="text/javascript">
    Event.observe(window, 'load', function() {
        ig_lightbox_main_img=0;
ig_lightbox_img_sequence.push('http://someimageurl.com/image.jpg');
ig_lightbox_img_labels.push("Some text");
ig_lightbox_img_sequence.push('http://someimageurl.com/image2.jpg');
ig_lightbox_img_labels.push("Some text 2");
    });
</script>

I want to read the url form the above script which is coming with html of page i have used this code for now

$html = str_get_dom('some page html here');
     foreach($html('.product-img-box script[type=text/javascript]') as $script){
     echo $script->html();
}

But this is not working. Any idea on how to read script

Answer 1

Try with quotes around type=text/javascript in the string to the $html object.

I had a look here and they have an example:

foreach($html('a[href ^= "http://"]') as $element) {
    $element->wrap('center');
}

I think it was the / that may have made it return the wrong result.

EDIT

Was confused by the question before, I thought the issue was that you couldn't get the data inside the script and it was because of your selector. Anyway, after a bit of thinking, if you have a string copy of the script tag with data inside, just run a regular expression over it.

Here is an example that I tested:

$string = "<script type=\"text/javascript\">
    Event.observe(window, 'load', function() {
        ig_lightbox_main_img=0;
ig_lightbox_img_sequence.push('http://someimageurl.com/image.jpg');
ig_lightbox_img_labels.push(\"Some text\");
ig_lightbox_img_sequence.push('http://someimageurl.com/image2.jpg');
ig_lightbox_img_labels.push(\"Some text 2\");
    });
</script>";

$regex = "/\b(?:(?:https?|ftp|file):\/\/|www\.|ftp\.)[-A-Za-z0-9+&@#\/%=~_|$?!:,.]*[A-Za-z0-9+&@#\/%=~_|$]/";

$results = array();

preg_match_all($regex,$string,$results);

var_dump($results);
//Result: array(1) { [0]=> array(2) { [0]=> string(33) "http://someimageurl.com/image.jpg" [1]=> string(34) "http://someimageurl.com/image2.jpg" } } 

$results has the URL data inside of it as returned from preg_match_all (Documentation).

If it helps, once you have the URL, you can use parse_url (Documentation) in PHP which will split the string URL into something easier to work with.

Note: The regular expression used is quite a simple expression and won't cover every case. As stated here and here, it is very difficult to get a perfect regular expression for this.