Get img src with PHP

问题:

I would like to get the SRC attribute into a variable in this example:

So for example - I would like to get a variable $foo = "/images/image.jpg". Important! The src attribute will be dynamic, so it mustn't be hardcoded. Is there any quick and easy way to do this?

Thanks!

EDIT: The image will be a part of a huge string that is basically the content of a news story. So the image is just a part of that.

EDIT2: There will be more images in this string, and I would only want to get the src of the first one. Is this possible?

回答1:

Use a HTML parser like DOMDocument and then evaluate the value you're looking for with DOMXpath:

$html = '';  $doc = new DOMDocument(); $doc->loadHTML($html); $xpath = new DOMXPath($doc); $src = $xpath->evaluate("string(//img/@src)"); # "/images/image.jpg" 

Or for those who really need to save space:

$xpath = new DOMXPath(@DOMDocument::loadHTML($html)); $src = $xpath->evaluate("string(//img/@src)"); 

And for the one-liners out there:

$src = (string) reset(simplexml_import_dom(DOMDocument::loadHTML($html))->xpath("//img/@src")); 

回答2:

You would be better off using a DOM parser for this kind of HTML parsing. Consider this code:

$html = ''; $doc = new DOMDocument(); libxml_use_internal_errors(true); $doc->loadHTML($html); // loads your html $xpath = new DOMXPath($doc); $nodelist = $xpath->query("//img"); // find your image $node = $nodelist->item(0); // gets the 1st image $value = $node->attributes->getNamedItem('src')->nodeValue; echo "src=$value\n"; // prints src of image 

OUTPUT:

src=/images/image.jpg 

回答3:

I have done that the more simple way, not as clean as it should be but it was a quick hack

$htmlContent = file_get_contents('pageURL');  // read all image tags into an array preg_match_all('/]+>/i',$htmlContent, $imgTags);   for ($i = 0; $i 

回答4:

I know people say you shouldn't use regular expressions to parse HTML, but in this case I find it perfectly fine.

$string = ''; preg_match('/

回答5:

$imgTag =   LOB;  preg_match('%%i', $imgTag, $matches); $imgSrc = $matches[1]; 

DEMO

---

NOTE: You should use an HTML Parser like DOMDocument and NOT a regex.

回答6:

$str = '';  preg_match('/(src=["\'](.*?)["\'])/', $str, $match);  //find src="X" or src='X' $split = preg_split('/["\']/', $match[0]); // split by quotes  $src = $split[1]; // X between quotes  echo $src; 

Other regexp's can be used to determine if the pulled src tag is a picture like so:

if(preg_match('/([jpg]{3}$)|([gif]{3}$)|([jpeg]{3}$)|([bmp]{3}$)|([png]{3}$)/', $src) == 1) { //its an image } 

回答7:

There could be two easy solutions:

1. HTML it self is an xml so you can use any XML parsing method if u load the tag as XML and get its attribute tottally dynamically even dom data attribute (like data-time or anything).....
2. Use any html parser for php like http://mbe.ro/2009/06/21/php-html-to-array-working-one/ or php parse html to array Google this

文章来源: Get img src with PHP