Remove duplicates from a textbox

[jdk]

How do I create a textbox and have a button to click and it will take and remove any duplicates in a textbox.

It should remove blank lines too before removing the dupes. I haven't been able to find anything with doing it using a textbox and PHP.

 

[cassius]

Read everything into an array and then use array_unique

http://www.php.net/manual/en/function.array-unique.php

 

[Daniel]

Did this for you. Most recent post on my blog:

http://danltn.com/remove-all-duplicate-words-204/

Enjoy.

 

[Peter]

It should remove blank lines too before removing the dupes. I haven't been able to find anything with doing it using a textbox and PHP.

Just a note, php has absolutely no knowledge that the data has come from a textbox. All it knows is that it has certain data held in a variable.

Did this for you. Most recent post on my blog:

http://danltn.com/remove-all-duplicate-words-204/

Enjoy.

Just had a look at your example, it might be an idea for to add the ability to enable case insensitive searches as well (your current example is case sensitive)

 

[Daniel]

Just a note, php has absolutely no knowledge that the data has come from a textbox. All it knows is that it has certain data held in a variable.



Just had a look at your example, it might be an idea for to add the ability to enable case insensitive searches as well (your current example is case sensitive)

Hmm, I used a quick strtolower but I'm interested in extending this, do you have any suggestions?

 

[Peter]

there is no string to lower function used in your example.

Ideally you should encompass the script within a function. You could make the function have 2 inputs the 1st for the data and the second an optional 1 for case. Then simply use an if statement to determine if it is case sensitive.

function unique_words($data, $case_sensitive='0')
{
	if ($case_sensitive==1)
	{
		$data = strtolower($data);
	}
	$data = explode(" ", str_replace("\n", " ", $data));
	return array_unique($data);
}

Using the stripslashes and htmlentities is not necessary within the function as they are unrelated to the problem.

You have stripped slashes in your example but you never checked magic_quotes_gpc was enabled. If it is not then you are trying to strip valid data which could cause unexpected output (if the input was meant to contain a slash for example you would have removed it)

Also when testing I noticed from your example that “the is 1 entry and as” is another was this as intended (i left the behavior in my example).

Of course if you wish the function to output the words as a string then it would be easy to do but I left it as an array for now.