How I can HTML Special Chars remove without image SRC in string?

Question

I tried to remove the HTML code in the string without remove the picture code

$HTMLstring = "<div class="h3 clr"><span>hello world</span><img src="/root/image.jpg"></div>

$plainText = htmlspecialchars(trim(strip_tags($HTMLstring)));

$plainText // "hello world"

My Purpose: $plainText // "hello world <img src="/root/image.jpg">"

Okey but I lost image link. What should I do to prevent this part <img src="/root/image.jpg"> from being remove?

Answer 1

You can strip tags except those in 2nd parameter of strip_tags() :

$HTMLstring = '<div class="h3 clr"><span>hello world</span><img src="/root/image.jpg"></div>';
$AlwaysHTMLString = strip_tags($HTMLstring, '<img>');
echo $AlwaysHTMLString;
// hello world<img src="/root/image.jpg">

Don't use htmlspecialchars() or your <img> will not be rendered.