Insert automatic link in hashtags

Question

I need a system that identifies the word with # within a text and adds in a table.

And another system that identifies the word with # within a text, however, when it appears in the div, the word is linked.

Example of initial text:

The people at #Stackoverflow are great at #programming.

It turns into:

The staff of #Stackoverflow are great at #programming

Answer 1

If the target is just the common English accents, it’s easy to list them one by one. I would do a regex with the following blocks:

• A-Za-z upper and lower case without accent
• áàâãéèêíïóôõöúçñ: accentuated vowels of Portuguese, cedilla and others of lambuja, lowercase
• ÁÀÂÃÉÈÊÍÏÓÔÕÖÚÇÑ: accentuated vowels of Portuguese, cedilla and other lambuja vowels, uppercase spaces

Therefore:

/^[A-Za-záàâãéèêíïóôõöúçñÁÀÂÃÉÈÍÏÓÔÕÖÚÇÑ ]+$/

Or, leaving the lowercase/upper case distinction for implementation:

/^[a-záàâãéèêíïóôõöúçñ ]+$/i

So to use with 0-9, a-z, A-Z and accents:

<?php
    $text = "O pessoal do #Stackoverflow são ótimos em #programação.";
    $text = preg_replace('/(?<!\S)#([0-9a-zA-ZáàâãéèêíïóôõöúçñÁÀÂÃÉÈÍÏÓÔÕÖÚÇÑ_]+)/', '<a href="http://meusite.com/hashtag/$1">#$1</a>', $text);
    echo $text;
?>