Remove the last part of a string after underscore and random digit

Question

My string looks like

$img_name = "my_beautiful_picture_123456_789101112131415_16171819202122.jpg"

What's the easiest way to remove from the first underscore followed by a digit to the end?

I would like to output

my_beautiful_picture

I tried

$img_name = substr($img_name, 0, strpos($img_name, "_"));

and

$img_name = preg_replace('/_[0-9].*/', '', $img_name);

But result is my for both, I'm not very familiar with regex.

Answer 1

We could simply use a simple expression with preg_replace or preg_match or preg_match_all:

_[0-9].+

Test

$re = '/_[0-9].+/s';
$str = 'my_beautiful_picture_123456_789101112131415_16171819202122.jpg';
$subst = '';

$result = preg_replace($re, $subst, $str);

echo $result;

Output

my_beautiful_picture

DEMO

RegEx Circuit

jex.im visualizes regular expressions: