doupiao9318 2010-12-27 07:56
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使用PHP从图像中提取alt和/或title属性

I use this to extract the src of the image or the full path of image.

preg_match_all('/\< *[img][^\>]*src *= *[\"\']{0,1}([^\"\'\ >]*)/',$content,$matches);

It works for me so far, I get an array of all images sources. I am trying to be greedy and capture the alt and title values from the image tags.

I know it is not recommended to use regex to do it, but I really need a quick solution. I do not want it to return an error if alt or title is missing from the image tag.

Any input is appreciated and apologies. I know it is easier and appropriate with parser, but since I could get the src with that preg match i thought i could get the alt and title too! :)

Thanks a lot, happy new year :D

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  • drhwb470572 2010-12-27 08:08
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    Here's a solution using PHP's DOM parser:

    $domd = new DOMDocument();
    libxml_use_internal_errors(true);
    $domd->loadHTML(file_get_contents("http://stackoverflow.com"));
    libxml_use_internal_errors(false);
    
    $items = $domd->getElementsByTagName("img");
    $data = array();
    
    foreach($items as $item) {
      $data[] = array(
        "src" => $item->getAttribute("src"),
        "alt" => $item->getAttribute("alt"),
        "title" => $item->getAttribute("title"),
      );
    }
    
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