I'm trying to find all the unique whole words from a body of text. Currently this is what I am using but it doesn't seem to be working:
$textDump = "cat dog monkey cat snake horse"
$wholeWord = "/[\w]*/";
$uniqueWords = (preg_match($wholeWord, $textDump, $matches));
Any help would be appreciated. Thanks!
array_unique(
str_word_count($textDump,1)
);
[cat,dog]. It does not find unique words, i.e. [dog] from "cat dog cat"You can use str_word_count
$textDump = "cat dog monkey cat snake horse";
$uniqueWords = (str_word_count($textDump, 1);
[cat, dog, monkey, cat, snake, horse]Why not achieve this using explode(); and array_unique(); in this case?
$text = "cat dog monkey cat snake horse";
$foo = explode(" ", $text);
print_r(array_unique($foo));
The answers given so far all assume, that with "find all the unique whole words" you really meant "remove duplicates". Actually your question is not very clear about it, as you don't specify what your desired output is in your example, but I'll take you at your word and provide a solution for "find all the unique whole words".
This means, for the input:
"cat dog monkey cat snake horse"
You will get the output:
"dog monkey snake horse"
Actually, str_word_count is useful for this too, together with array_count_values, which actually counts the different values:
$wordCount = array_count_values(str_word_count($textDump,1));
$wordCount is now:
array(5) {
["cat"] => int(2)
["dog"] => int(1)
["monkey"] => int(1)
["snake"] => int(1)
["horse"] => int(1)
}
Next, remove the words with a word count higher than 1 (note, that the actual words are the array keys, so we use array_keys to get them:
$uniqueWords = array_keys(
array_filter(
$wordCount,
function($count) {
return $count === 1;
}
)
);
$uniqueWords is now:
array(4) {
[0] => string(3) "dog"
[1] => string(6) "monkey"
[2] => string(5) "snake"
[3] => string(5) "horse"
}
Complete code:
$textDump = "cat dog monkey cat snake horse";
$wordCount = array_count_values(str_word_count($textDump,1));
$uniqueWords = array_keys(
array_filter(
$wordCount,
function($count) {
return $count === 1;
}
)
);
echo join(' ', $uniqueWords);
//dog monkey snake horse
preg_match_all. And the result is thrown into the third variable,$matches(\w*). Note: no need to use a character class ([]) for just a single "character". That's redundant.