str_replace + upper and lower case

[jonno946]

Hi there, just in the process of getting my smilies working.

$output = str_replace(":d", "<img src=grin.gif>", $output);

It is all working fine, however i am having problems making it both upper and lower case compatible.

e.g if a user enters :d - the smilie shows up, but if the user enters : D - the text shows up, and not the smiley.

How do i make it so whether :d or : D is entered it displays the smiley.

I have tried strtolower to no avail.

Thanks!!

Jonathan

[ahundiak]

An easy way is to use arrays as args.
$search = array('d:','D:');
$replace = array("<img src=grin.gif>","<img src=grin.gif>");
$output = str_replace($search,$replace,$output).

A more general way is to to use preg_replace. Look in the comments in the manual for examples.
http://www.php.net/manual/en/function.str-replace.php

[superwormy]

www.php.net/eregi_replace
www.php.net/stri_replace

[Merve]

Also check out: [man]preg_replace[/man]

[jonno946]

Hi there, thankyou for all of your replies.

I have been trying all of your ideas and a few more in the php manual for a good couple of hours this morning with no resolution 🙁

ahundiak, that was works very well, however i am retrieving both smileys and [tab]s from the same table in my mysql database (basucally ubb code).

Some tabs have several letters so it would be inappropriate to put every single combination of [font] [Font] [FOnt] FONt] [FONT] for example...

I have tried the preg_replace function, however that seems to bring up numerous error messages, e.g

"No ending delimiter".

I would like to avoid the eregi functions as i have heard they are heavy on the server and processing times.

Any more ideas?

Thanks.

Jonathan

[Weedpacket]

Originally posted by jonno946
I have tried the preg_replace function, however that seems to bring up numerous error messages, e.g

"No ending delimiter".

The way to fix that particular error message is to have delimiters around your regexp. You'll note from the various examples on the preg_replace and related pages that there are extra characters at the beginning and end of the regexp; usually '/' but you can use any non-alphanumeric character and it's easiest to use one that doesn't appear anywhere in the regexp. Those are the delimiters. Leave those off and those functions will complain.

The delimiters are there because you can follow the regexp with additional modifiers, and the functions therefore need to know where the regexp leaves off and the modifiers (if any) begin. For example, you'll want to use 'i' as a modifier so that the matching will be case-insensitive.

[jonno946]

Hi there,

To be honest, i'm a bit confiused at your post weedpacket, however i have been trying to get it working again, with no sucess still!!

Just wondering if you can look at my code and see if you can point anything out -

<?php

$str_rep = "SELECT * FROM `smilies`";

$str_rep_result = mysql_query($str_rep, $db) or die ("Couldn't execute query"); 

$output = nl2br(htmlentities($post_vars[message]));

while ($str_rep_row = mysql_fetch_array($str_rep_result)){

$output = str_replace($str_rep_row["original"], $str_rep_row["change_to"], $output);

}

echo $output;

?>

I have been experiementing with the following i found in the PHP manual:

$newstring = preg_replace("/Old/i", "New", "OLd string.");

This works great just using text like above, but when i try and combine it with variables within the loop it still doesnt work 🙁

e.g:

$output = preg_replace("/$str_rep_row['original']/i", $str_rep_row['change_to'], $output);

Thanks for all the help!!

Jonathan

[Weedpacket]

Originally posted by jonno946
This works great just using text like above, but when i try and combine it with variables within the loop it still doesnt work 🙁

e.g:

$output = preg_replace("/$str_rep_row['original']/i", $str_rep_row['change_to'], $output);

Thanks for all the help!!

Jonathan [/B]

I don't know why the parser expects this, but apparently when you use arrays inside strings you don't quote the indices:

$output = preg_replace("/$str_rep_row[original]/i", $str_rep_row['change_to'], $output);

That said, you might want to observer that the first two arguments you pass to preg_replace can be entire arrays: the first argument being all the patterns you want to search for, and the second being the corresponding replacement texts:

$search=$replace=array();
while ($str_rep_row = mysql_fetch_array($str_rep_result)){
    $search[] = '/'.preg_quote($str_rep_row['original']).'/i';
    $replace[] = $str_rep_row['change_to'];
} 
$output = preg_replace($search, $replace, $output);

Likely to be much faster. Oh, and I put preg_quote in there on the off-chance that some of your smileys use characters that mean things in regexps; '|' or ')', for example.

[jonno946]

Hi again, thanks for that, much appreciated!

However, i am just getting lists of 'unknown modifier' errors?

its probubly something i have done so i thought i would post the current code:

<?php

$str_rep = "SELECT * FROM smilies";

$str_rep_result = mysql_query($str_rep, $db) or die ("Couldn't execute query"); 

$output = nl2br(htmlentities($post_vars[message]));

$search=$replace=array();

while ($str_rep_row = mysql_fetch_array($str_rep_result)) {

$search[] = '/'.preg_quote($str_rep_row['original']).'/i';

$replace[] = $str_rep_row['change_to'];

} 

$output = preg_replace($search, $replace, $output);

echo $output;

?>

Thanks.

Jonathan

[Weedpacket]

Have a look at the code you posted. All those pretty colours. Not necessarily the right colours, but pretty nonetheless.

Oh, and I just looked at the [man]preg_quote[/man] page; I guess there maybe should be a second argument to that, '/', but no doubt you've already looked the function up and tried that by now.

[jonno946]

I have looked into everything i can think of, and nothing appears to be out of place above.

I have removed the `s out of the query and still no luck 🙁

The errors i get are:

Warning: Unknown modifier 'b' in /home/ehelper/public_html/view_post.php on line 458

Warning: Unknown modifier '\' in /home/ehelper/public_html/view_post.php on line 458

Warning: Unknown modifier '\' in /home/ehelper/public_html/view_post.php on line 458

Warning: Unknown modifier 'q' in /home/ehelper/public_html/view_post.php on line 458

Warning: Unknown modifier 'p' in /home/ehelper/public_html/view_post.php on line 458

Warning: Unknown modifier 'b' in /home/ehelper/public_html/view_post.php on line 458

Warning: Unknown modifier 't' in /home/ehelper/public_html/view_post.php on line 458

Thanks

Jonathan

[Weedpacket]

Originally posted by jonno946
anyone?

Tell you what.

(a) Take into account that some people might live in a different timezone to you.

(b) If it's the strings '/'.preg_quote($str_rep_row['original']).'/i' playing up and you don't see what's wrong with them, echo some of them out so that people who could see what's wrong with them have a look.

[jonno946]

i've dont that, it works fine - it even ignores weather it is upper or lower case wghich is exactly what i want it to do:

<?php

$s = '/' . preg_quote($search) . '/i';

$r = $replace;

$output = preg_replace($s, $r, $output);

echo $output;

?>

Why will it not work on my origional script still?

Jonathan