如何用正则表达式中的点替换字符串的一部分？

Question

Here is the string that I want to replace:

<img src="./handler_image.php?i=c52bc1c30f560f4a15f99eeb8c04fea6" alt="Favicon" class="favicon">

I wrote this code:

$answer = preg_replace('/<img src="\./.*?>/', '', $answer);

but it does not work. If I replace it with:

$answer = preg_replace('/<img src=".*?>/', '', $answer);

It works but then it replaces all the images and not the ones whose src is in the format above. How should I modify this statement?

Answer 1

The forward slash after the dot needs to be escaped too.

try this:

$answer = preg_replace('/<img src="\.\/.*?>/', '', $answer);

Answer 2

Here's the regex working <img src="\\.\\/.*?> .

By the way, you can go there http://regexr.com/ to know how your regex is working.