PHP检测重复的单词

Question

Is it possible to detect a repeated word from this string :

$string = "dogdog";

I want a return of "str" only and not "strstr"

I tried some good solution but it won't really do how i want it to be done :

$string = "dogdog";
$length = strlen($string) / 2;
 echo substr($string, $length);

I want it to be detected from a big sentence ( $string = " dogdog something dogdog else bla bla, something, ( something ); something"; ).... String contains 2 repeated Correct words without separation , How is it to detect and fix it to a real single word?

Answer 1

explode / preg_split your sentence into an array of words, and then use your technique on each word.

You haven't specified what constitutes a "word"; this will determine precisely what delimiters you will need to explode on.

Answer 2

You should do this iteratively. Here's a start:

//turn punctuation into something we can split on
$sanitized = preg_replace('/[^a-z0-9]+/i', '_', $string);
$words = explode("_",$sanitized);

//now that you have a 'clean' array, do logic
foreach($words as $word) {
    //tinker with word dup' logic here.
}