Question

$image variable gives this code (when echo is used):

<img src="/image.png" width="100" height="147" alt="" class="some_class" />

• width, height, src and class
  attributes can be different.

What should we do:

1. remove width and height from $image
2. replace alt="" with alt="Poster"

Thanks.

Answer 1

I’d use regular expressions to do this.

// Replace width="..." and height="..." with nothing
$variable = preg_replace('/(width|height)\s*=\s*"[^"]*"/i', '', $image);

// Replace alt="..." with alt="Poster"
$variable = preg_replace('/alt\s*=\s*"[^"]*"/i', 'alt="Poster"', $variable);

This method is not dependant on the order of the attributes, which of the some other answers are. Also note that the second regular expressions will replace alt="<any string here>" with alt="Poster". It should be easy enough to change it to only replace alt="" though.