如何检测数组中的类似值？

Question

Say I have a list of genres that looks something like:

$genres = array(
    'soul', 
    'soul jazz', 
    'blues', 
    'jazz blues', 
    'rock', 
    'indie', 
    'cool jazz', 
    'rock-blues');

...And so on, for 762 values. How can I organize these genres into categories?

For example, I would want the Blues category to contain 'blues', 'jazz blues', and 'rock blues.' I would want the Jazz category to contain 'soul jazz', 'jazz blues', and 'cool jazz.'

Any and all help is appreciated.

Answer 1

Using preg_match would be one the best ways to solve your problem.

<?php
$categories = array("blues", "jazz");
$genres = array("soul", "soul jazz", "blues", "jazz blues", "rock", "indie", "cool jazz", "rock-blues");
$arr = array();
$others = array();
foreach($genres as $genre){
$num = 0;
    foreach($categories as $category){
        if(preg_match("/\\b".$category."\\b/", $genre)){
        $arr[$category][] = $genre;
        $num = 1;
        }
    }
    if($num == 0){
    $others[] = $genre;
    }
}
ksort($arr);
$arr["others"] = $others;
unset($genre, $num, $category, $others);
print_r($arr);
?>

The result will be:

Array
(
    [blues] => Array
        (
            [0] => blues
            [1] => jazz blues
            [2] => rock-blues
        )

    [jazz] => Array
        (
            [0] => soul jazz
            [1] => jazz blues
            [2] => cool jazz
        )

    [others] => Array
        (
            [0] => soul
            [1] => rock
            [2] => indie
        )

)