Find the number of occurring strings within a string but starting with specific character

Question

My problem is similar to this question:

But I need to extend the regex in order to take under consideration strings that begin with _ (underscore).

So how is this regex '/(\S{2,}?)\1+/' extended in order to match my need?

EX

The string 'parent_parent_parent.parent' should return [_parent] => 2

Possible duplicate of [Learning Regular Expressions](http://stackoverflow.com/questions/4736/learning-regular-expressions) — Biffen, May 03 '16 at 17:16
@Biffen http://stackoverflow.com/questions/4736/learning-regular-expressions is not even a question and the answer is a general guide to regular expressions. Sure not what I was looking for. — Chris Athanasiadis, May 03 '16 at 17:35
@Biffen Ok I will start reading, then. Even though I was hoping for a quick solution. — Chris Athanasiadis, May 03 '16 at 17:41

score 1 · Accepted Answer · answered May 03 '16 at 17:43

1

If your need is "find all repeating substrings that start with an underscore", just add the underscore to the regular expression: /(_[\S]{2,}?)\1+/

answered May 03 '16 at 17:43

GertG

score 0 · Answer 2 · answered May 03 '16 at 17:27

0

Try this

There is a function in PHP called substr_count that did the same trick.

Similar function: mb_substr_count.

$str = "parent_parent_parent.parent";

echo substr_count($str, "_parent"); // 2

answered May 03 '16 at 17:27

Murad Hasan

The string is not known that's why I need a regex – Chris Athanasiadis May 03 '16 at 17:32

2 Answers2