Why LTRIM behaving like this in PHP

Question

I have a string www.waada.com

Why

ltrim("www.waada.com", "www.") returns aada.com

OR

ltrim("www.waada.com", "ww.") returns aada.com

OR

ltrim("www.waada.com", "w.") returns aada.com

I want waada.com as final output.

It should just trim "www." from left side of the word.

Then why do you use ltrim()? Have you read the manual? Use str_replace($str, "www.",""); — Andreas, Sep 07 '17 at 06:43
Because second argument is a __list of symbols__, not a __word__ — u_mulder, Sep 07 '17 at 06:43
@Andreas `str_replace(www.waadawww.com, "www.", "")` will have incorrect results — Umair Ayub, Sep 07 '17 at 06:44
https://stackoverflow.com/questions/34005517/php-removing-www-from-url https://stackoverflow.com/questions/6336281/php-remove-www-from-url-inside-a-string — u_mulder, Sep 07 '17 at 06:46
@Umair well that was not your question. If that is the case the Substr the string so you only replace at the start of the string — Andreas, Sep 07 '17 at 06:46
If you would have read the manual about the function you tried to use it would be obvious. `You can also specify the characters you want to strip, by means of the character_mask parameter. **Simply list all characters that you want to be stripped. With .. you can specify a range of characters.**` — Andreas, Sep 07 '17 at 15:38

score 2 · Accepted Answer · answered Sep 07 '17 at 06:49

2

If the string is as per comment with www at the end then use preg_replace.

Echo preg_replace("/^www\./", "", "www.waadawww.com");

The pattern is:
At start of string match literally www. and replace with nothing

answered Sep 07 '17 at 06:49

Andreas

@Neodan and preg_replace is even better ;-) – Andreas Sep 07 '17 at 06:57
yes `preg_replace` is perfect in this situation... I that and have in mind but somehow wrote `preg_match` :D – Neodan Sep 07 '17 at 07:01

score 1 · Answer 2 · answered Sep 07 '17 at 07:03

<?php

echo preg_replace("/^www\./","","www.waadawww.com");

If you are allergic you can avoid regex altogether, but I find the above code much cleaner:

<?php

$url = "www.waadawww.com";
echo strpos($url, "www.") === 0 ? substr($url, 4) : $url;

2 Answers2