Asked  7 Months ago    Answers:  5   Viewed   24 times

Right now I am using this function for emoticons:

function emoticons($text) {
        $icons = array(
                ':)'    =>  '<img src="/images/blank.gif" alt="smile" class="icon_smile" />',
                ':-)'   =>  '<img src="/images/blank.gif" alt="smile" class="icon_smile" />',
                ':D'    =>  '<img src="/images/blank.gif" alt="smile" class="icon_laugh" />',
                ':d'    =>  '<img src="/images/blank.gif" alt="laugh" class="icon_laugh" />',
                ';)'    =>  '<img src="/images/blank.gif" alt="wink" class="icon_wink" />',
                ':P'    =>  '<img src="/images/blank.gif" alt="tounge" class="icon_tounge" />',
                ':-P'   =>  '<img src="/images/blank.gif" alt="tounge" class="icon_tounge" />',
                ':-p'   =>  '<img src="/images/blank.gif" alt="tounge" class="icon_tounge" />',
                ':p'    =>  '<img src="/images/blank.gif" alt="tounge" class="icon_tounge" />',
                ':('    =>  '<img src="/images/blank.gif" alt="sad face" class="icon_sad" />',
                ':o'    =>  '<img src="/images/blank.gif" alt="shock" class="icon_shock" />',
                ':O'    =>  '<img src="/images/blank.gif" alt="shock" class="icon_shock" />',
                ':0'    =>  '<img src="/images/blank.gif" alt="shock" class="icon_shack" />',
                ':|'    =>  '<img src="/images/blank.gif" alt="straight face" class="icon_straight" />',
                ':-|'   =>  '<img src="/images/blank.gif" alt="straight face" class="icon_straight" />',
                ':/'    =>  '<img src="/images/blank.gif" alt="straight face" class="icon_straight" />',
                ':-/'   =>  '<img src="/images/blank.gif" alt="straight face" class="icon_straight" />'
        );
        return strtr($text, $icons);
    }

But if you enter a link the :/ part of http:// gets replaced:

enter image description here

Same with code (4 spaces in front of each line to create code box), but for some reason a simple ) gets replaced (with a wink) as well:

enter image description here

Is there a better solution to this than replacing all of the icons like this? It obviously doesn't work good. I have searched on Google a lot and haven't found any better way. I also tried putting a space before each emoticon in the associative array above but that doesn't work if you just enter a :) without anything before it.

 Answers

66

You can use the preg_replace function and then use word boundaries in the regular expression.

 foreach($icons as $icon=>$image) {
      $icon = preg_quote($icon);
      $text = preg_replace("~b$iconb~",$image,$text);
 }

You need to use word boundaries and not white space because this will take care of the start and end points to. Needing a space before means that just a :) won't be found.

Wednesday, March 31, 2021
 
Silfverstrom
answered 7 Months ago
47

How about something like this?

function merge_querystring($url = null,$query = null,$recursive = false)
{
  // $url = 'http://www.google.com.au?q=apple&type=keyword';
  // $query = '?q=banana';
  // if there's a URL missing or no query string, return
  if($url == null)
    return false;
  if($query == null)
    return $url;
  // split the url into it's components
  $url_components = parse_url($url);
  // if we have the query string but no query on the original url
  // just return the URL + query string
  if(empty($url_components['query']))
    return $url.'?'.ltrim($query,'?');
  // turn the url's query string into an array
  parse_str($url_components['query'],$original_query_string);
  // turn the query string into an array
  parse_str(parse_url($query,PHP_URL_QUERY),$merged_query_string);
  // merge the query string
  if($recursive == true)
    $merged_result = array_merge_recursive($original_query_string,$merged_query_string);
  else
    $merged_result = array_merge($original_query_string,$merged_query_string);
  // Find the original query string in the URL and replace it with the new one
  return str_replace($url_components['query'],http_build_query($merged_result),$url);
}

usage...

<a href="<?=merge_querystring($url,'?page=1');?>">Page 1</a>
<a href="<?=merge_querystring($url,'?page=2');?>">Page 2</a>
Wednesday, March 31, 2021
 
saad
answered 7 Months ago
96

This is not recommended...

... even if encrypted. Storing this information on a client machine gives them the opportunity to compare cookies in the hopes of decrypting. Worse they could sniff a cookie from someone else and then masquerade as that user!

What is recommended is having the user login through a secure connection and sending a session cookie in response. The session cookie contains a session id which PHP will automatically map to a session file on the server. You can then store a user id in the session. After a short time, the session should be expired.

Sessions are automatically managed by PHP and you should take advantage of it.

Here's a tutorial on how to use PHP sessions.

Wednesday, March 31, 2021
 
ClmentM
answered 7 Months ago
82
iconv("utf-8","ascii//TRANSLIT",$input);

Extended example

Friday, June 4, 2021
 
muaaz
answered 5 Months ago
96

For simple replacements, strtr seems to be faster, but when you have complex replacements with many search strings, it appears that str_replace has the edge.

Saturday, August 7, 2021
 
YASPLS
answered 3 Months ago
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