How to trim a very specific part of a string?

Question

I have a string that contains an <img> tag somewhere in text entered by users. I want to get rid of all the text but keep the image tag but I have no idea how to do that, is it possible?

$str = "<img src= 'imagepath'/> Lorem ipsum dolor sit amet, consectetur adipiscing elit"

What I want it to do is only keep the and get rid of all the other text and instead look like this:

$str = "<img src='imagepath'/>"

@mplungjan I’m doing this off my iPad so on stackoverflow all the curly quotes are wrong — lochness, Sep 29 '21 at 11:00
@mplungjan I don’t want to force users to put an img tag at the start always so might be an issue — lochness, Sep 29 '21 at 11:01

score 0 · Answer 1 · answered Sep 29 '21 at 11:07

0

Here a solution with to capture < to >

$regex = '/<.*?\>/m';
$str = "<img src='imagepath'> Lorem ipsum dolor sit amet, consectetur adipiscing elit";

preg_match($regex, $str, $result);

var_dump($result[0]);

Output is '<img src='imagepath'>'

answered Sep 29 '21 at 11:07

Dylan Delobel

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score 0 · Answer 2 · answered Sep 29 '21 at 11:22

A javascript method to extract the tag :

Only possible when there is only one tag and no extra < >
Can use any string extracter like substring substr ....

var str = "<img src= 'imagepath'/> Lorem ipsum dolor sit amet, consectetur adipiscing elit"

function trimTagOut() {
  var index1 = str.indexOf("<")
  var index2 = str.indexOf(">")
  var slicedTag = str.slice(index1, index2+1) 
  document.getElementById("demo").innerHTML = slicedTag;
}

<button onclick="trimTagOut()">Trim tag</button>
<div id="demo"></div>

score 0 · Accepted Answer · answered Sep 29 '21 at 11:50

with the help of string manipulation, you can do this with PHP by following method.

$str = "<img src= 'imagepath'/> Lorem ipsum dolor sit amet, consectetur adipiscing elit";
$start=strpos($str, '<');
$end=strpos($str, '/>');
$img=substr($str, $start, $end-$start+1);

How to trim a very specific part of a string?

3 Answers3