使用php从javascript代码中提取JSON

Question

I want to extract JSON between var data = { and A.trigger ...

$images_script = <<<EOM

P.when('A').register("ImageBlockATF", function(A){
    var data = {
                'colorImages': { 'initial': [{"hiRes":"https://images-na.ssl-images-amazon.com/images/I/61z4lNt%2BjZL._SL1300_.jpg","thumb":"https://images-na.ssl-images-amazon.com/images/I/31%2BSEYm%2B8QL._SS40_.jpg","large":"https://images-na.ssl-images-amazon.com/images/I/31%2BSEYm%2B8QL.jpg",
"main":{"https://images-na.ssl-images-amazon.com/images/I/61z4lNt%2BjZL._SY355_.jpg":[355,355],"https://images-na.ssl-images-amazon.com/images/I/61z4lNt%2BjZL._SY450_.jpg":[450,450],"https://images-na.ssl-images-amazon.com/images/I/61z4lNt%2BjZL._SX425_.jpg":[425,425],"https://images-na.ssl-images-amazon.com/images/I/61z4lNt%2BjZL._SX466_.jpg":[466,466],"https://images-na.ssl-images-amazon.com/images/I/61z4lNt%2BjZL._SX522_.jpg":[522,522]},"variant":"MAIN"}]},
                'colorToAsin': {'initial': {}},
                'holderRatio': 1.0,
                'holderMaxHeight': 700,
                'weblabs' : {}
                };
    A.trigger('P.AboveTheFold'); // trigger ATF event.
    return data;
});        
EOM;

I have tried

$startsAt = strpos($out, "var data = {") + strlen("var data = {");
$endsAt = strpos($out, "A.trigger", $startsAt);
$result = substr($out, $startsAt, $endsAt - $startsAt);

and also have tried

preg_match('~var data =(.*?)A.trigger~', $images_script, $output);

But I am not able to get that JSON.

Can someone tell me how do I do that?

Answer 1

if your data is always the same you can use simple regex like below

but if your website is changing or there are more different pages then you must use somethink else

---

if data var structure isalways the same:

preg_match('/\s?data\s?\=\s?(\{[^\;]+\})/i',$images_script,$matches);
$parsed=json_decode(str_replace("'",'"',$matches[1]),true);

php result here

o if you want just images with correspponding resolution try this

\"([^\"]+)\"\s?\:\s?\"(https?\:\/\/[^\"]+)\"

$mathes=[];
preg_match_all('/\"([^\"]+)\"\s?\:\s?\"(https?\:\/\/[^\"]+)\"/im',$your_text,$matches);

php Result is here