CODEWITHSUNDEEP
php
Dan
Dan

Reputation: 1110

Finding Hashtags in String

I am trying to find all the hashtags in a String

Example String:

Hello World #Hello #World #Hello-World #Hello_World #Test-Tag

I tried using below code:

preg_match_all('/#([^\s]+)/', $postbody, $matches);
    $tags = implode(',', $matches[1]);
    var_dump($tags);

The result is

Hello,World,Hello-World,Hello_World,Test-Tag

How can I make it end at any characters besides A-Z, a-z, and 0-9

My goal output is

Hello, World, Test

I would like it to stop right before it reaches a character that isn't a letter or number also not print duplicates.

Reference: Get hashtag from string reference

Upvotes: 0

Views: 375

Answers (1)

Ataur Rahman
Ataur Rahman

Reputation: 1791

You can use [a-zA-Z0-9] regex to get only letters and numbers.
And later, use array_unique to filter out duplicate matches 

$postbody = 'Hello World #Hello #World #Hello-World #Hello_World #Test-Tag';

preg_match_all('/#([a-zA-Z0-9]+)/', $postbody, $matches);
if(!empty($matches)){
   $tags = implode(',', array_unique($matches[1]));
   var_dump($tags);
}

Output: string(16) "Hello,World,Test"

Upvotes: 1

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