how to check if some characters are in an string?

Question

we have an string like :

$string="Lorem Ipsum is simply dummy text of the printing and typesetting industry.";

so i want to check if some words are available in that string. for example the words :

$words=['Ipsum','54'];

and you can see Ipsum is in the string but 54 is not in string, so the function should call back true (because Ipsum found). I'm using php, thanks for helping.

You should use strpos, run foreach() for $words array and use strpos inside foreach. — Saba Tandashvili, Apr 13 '17 at 12:33
Have a look at [this](http://stackoverflow.com/a/4366748/7008354) question from the sidebar. — Tobias F., Apr 13 '17 at 12:33

score 1 · Answer 1 · answered Apr 13 '17 at 12:34

1

A simple loop combined with strpos should be all you need to achieve this

function containsOneOfThoseWords($str, $words) {
    foreach ($words as $word) {
        if (strpos($str, $word) !== false) return true;
    }
    return false;
}

answered Apr 13 '17 at 12:34

Philipp

15,377
4
35
52

thanks for helping but see this code : https://ali98.xyz/filter.txt , it didn't work! – Ali YQB Apr 13 '17 at 12:43
@AliYQB You shoud pass the arguments to the function... `containsOneOfThoseWords($str, $words)` – Philipp Apr 13 '17 at 13:19

marmeladze · Accepted Answer · 2017-04-13T13:01:36.333

0

php > $string="Lorem Ipsum is simply dummy text of the printing and typesetting industry.";
php > $lookfor = "simply";
php > echo strpos($string, $lookfor) > 0 ? true : false ;
1
php > $lookfor = "simplest";
php > echo strpos($string, $lookfor) > 0 ? true : false ;
//nothing will be printed -))

just make a function from above snippet.

update

$ cat search.php
<?php

$domain="asdasd asd fasdfasfafafad f454   asdfa";
$lookfor=array('as','f454');

function containsOneOfThoseWords($str, $words) {
    foreach ($words as $word) {
        if (strpos($str, $word) !== false) return true;
    }
    return false;
}

echo containsOneOfThoseWords($domain, $lookfor);
?>
$ php search.php; echo 
1

edited Apr 13 '17 at 13:01

answered Apr 13 '17 at 12:34

marmeladze

6,468
3
24
45

`strpos` could also return `0`, which is perfectly fine, if the search word is at position `0` - you should check against `false` and not `> 0` – Philipp Apr 13 '17 at 12:36
yeah that's right -)) – marmeladze Apr 13 '17 at 12:38
thanks for helping but see this code : ali98.xyz/filter.txt , it didn't work! – Ali YQB Apr 13 '17 at 12:53
you should pass arguments to your `containsOneOfTheseWords` function. I've fixed it - see my updated answer. – marmeladze Apr 13 '17 at 12:59

how to check if some characters are in an string?

2 Answers2