问php删除数组中的重复字词

EN

function cool_function($strs){
    // Black list
    $toExclude = array();

    foreach($strs as $s){
        // If it's not on blacklist, then search for it
        if(!in_array($s, $toExclude)){
            // Explode into blocks
            foreach(explode(" ",$s) as $block){
                // Search the block on array
                $found = preg_grep("/" . preg_quote($block) . "/", $strs);
                foreach($found as $k => $f){
                    if($f != $s){
                        // Place each found item that's different from current item into blacklist
                        $toExclude[$k] = $f;
                    }
                }
            }
        }
    }

    // Unset all keys that was found
    foreach($toExclude as $k => $v){
        unset($strs[$k]);
    }

    // Return the result
    return $strs;
}

$strs = array("Lincoln Crown","Crown Court","go holiday","house fire","John Hinton","Hinton Jailed");
print_r(cool_function($strs));

Array
(
    [0] => Lincoln Crown
    [2] => go holiday
    [3] => house fire
    [4] => John Hinton
)

<?
// Store existing array's words; elements will compare their words to this array
// if an element's words are already in this array, the element is deleted
// else the element has its words added to this array
$arrayWords = array();

// Loop through your existing array of elements
foreach ($existingArray as $key => $phrase) {
    // Get element's individual words
    $words = explode(" ", $phrase);

    // Assume the element will not be deleted
    $keepWords = true;

    // Loop through the element's words
    foreach ($words as $word) {
        // If one of the words is already in arrayWords (another element uses the word)
        if (in_array($word, $arrayWords)) {
            // Delete the element
            unset($existingArray[$key]);

            // Indicate we are not keeping any of the element's words
            $keepWords = false;

            // Stop the foreach loop
            break;
        }
    }

    // Only add the element's words to arrayWords if the entire element stays
    if ($keepWords) {
        $arrayWords = array_merge($arrayWords, $words);
    }
}
?>

$words = array();

foreach($str as $key =>$entry)
{
   $entryWords = explode(' ', $entry);
   $isDuplicated = false;
   foreach($entryWords as $word)
        if(in_array($word, $words))
            $isDuplicated = true;
   if(!$isDuplicated)
        $words = array_merge($words, $entryWords);
   else
        unset($str[$key]);
}

var_dump($str);

array (size=4)
  0 => string 'Lincoln Crown' (length=13)
  2 => string 'go holiday' (length=10)
  3 => string 'house fire' (length=10)
  4 => string 'John Hinton' (length=11)