Question

我想在var data = {和A.trigger ...

之间提取JSON

$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;

我试过了

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

也尝试了

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

但我无法获得那个JSON。

有人可以告诉我该怎么做？

Answer 1

你非常接近preg_match尝试，你只需使用s标志（单行标志）

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

<强> Working demo

<强> IDEOne demo

顺便说一句，请记住，自从您使用;作为边界后，捕获的json将包含A.trigger

Answer 2

如果您的数据始终相同，则可以使用下面的简单正则表达式

但是如果您的网站正在发生变化，或者有更多不同的网页，那么您必须使用其他方式

如果数据var结构总是相同：

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

php result here

o如果您只想要具有相应分辨率的图像，请尝试this

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

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

php Result is here

使用php从javascript代码中提取JSON

2 个答案: