Convert comma separated string into array

Question

I have a comma separated string, which consists of a list of tags and want to convert it to array to get a link for every tag.

Example:

$string = \'h         


        

Answer 1

Try this

$tagss = trim($tagss);    
return substr($tagss, 0 , strlen($tagss)-1);

Answer 2

The workaround(!) would be to remove the unwanted trailing characters afterwards:

$tagss = rtrim($tagss, ", ");

This rtrim removes any mix of spaces and commas from the right end of the string.

Btw, you could use str_getcsv instead of explode, which also handles input spaces better.

Answer 3

Another solution:

$html = trim(preg_replace('/([^,]+)/', ' <a href="/tags/\1" title="\1">\1</a>', $string));

Or if you have to html encode the tags (always smart, since you're creating html from text):

$html = trim(preg_replace_callback('/([^,]+)/', function($match) {
    $tag = $match[1];
    return ' <a href="/tags/' . urlencode($tag) . '" title="' . htmlspecialchars($tag) . '">' . htmlspecialchars($tag) . '</a>';
}, $string));

So this $string would work too: "tag with space,html,css,php,mysql,javascript"

More regex is always good!

Answer 4

Just like you exploded you can implode again:

$tags = explode(',', $arg);
foreach ($tags as &$tag) {
    $tag = '<a href="' . $u . 'tag/' . $tag . '/" title="' . $tag . '">' . $tag . '</a>';
}

return implode(', ', $tags);