Convert HTML5 img to AMP amp-img with attribute conversion

Question

I need to convert an img like this:

<img src="https://techcrunch.com/wp-content/uploads/2015/04/codecode.jpg" style="height:404px; width:602px" />

to this:

<amp-img src="https://techcrunch.com/wp-content/uploads/2015/04/codecode.jpg" height="404" width="602"></amp-img>

Keeping in mind that this code will be in a portion of code with more html tags and, important, I can't use any library or anything..

I await answers, thanks in advance!

Answer 1

You can Achieve your goal with following code :

function html5toampImage($string) {

preg_match('/src="(.+?)"/', $string, $src);
$srcAttribute = $src[0];

preg_match('/style="(.+?)"/', $string, $styles);
$style = $styles[1];

$allData = explode(";",$style);

foreach($allData as $data) {
    if($data) {
        list($key,$value) = explode(":",$data);
        if(trim($key)=="height") {
        $heightAttribute =  trim($key).'="'.trim(str_replace("px","",$value)).'"'; 
        }
    if(trim($key)=="width") {
        $widthAttribute =  trim($key).'="'.trim(str_replace("px","",$value)).'"';
        }       
    }
}

$ampImageTag = '<amp-img '.$srcAttribute.' '.$heightAttribute.' '.$widthAttribute.' layout="responsive"></amp-img>';

return $ampImageTag;
} 

$html5Tag = '<img alt="aa" src="https://techcrunch.com/wp-content/uploads/2015/04/codecode.jpg" style="height:404px; width:602px; color:red" />';


echo htmlentities(html5toampImage($html5Tag));

Here is working eval url