find数组的元素在PHP的另一个数组中

Question

Array A:

486 987

Array B:

247-16-02-2009 486-16-02-2009 562-16-02-2009 1257-16-02-2009 486-16-02-2009 

I want to search and list all Array A elements that matches in Array B. for example: 486-16-02-2009 (twice).

Answer 1

You could do something like this, however it's probably not as good as using php built-ins like array-intersect because we're entering loop-hell. If either array gets too big your script will slow to a crawl.

foreach ($arrB as $values) {
    foreach ($arrA as $compare) {
        if (substr($values, 0, strlen($compare)) == $compare) {
            //do stuff
        }
    }
}