PHP搜索具有多个结果的多维数组？

Question

I found a way to search my multidimensional array and output the result and it works, however it only finds the first match and stops. If I have more than one match in the array I want to be able to show them all.

My array looks like this (the first layer of keys goes from 0, 1, 2 etc):

Array
(
    [0] => Array
        (
            [mydevice] => blahblah
            [ipadd] => 10.10.10.209
            [portnum] => 16040
        )

---

function searcharray($value, $key, $array) {
   foreach ($array as $k => $val) {
       if ($val[$key] == $value) {
           return $k;
       }
   }
   return null;
}

$myoutput = searcharray($ptn2, mydevice, $newresult);

I can then echo the results using something like $newresult[$myoutput][mydevice].

However if I have more than one entry in the array with a matching data in the 'mydevice' key it doesn't return them (just the first one).

Answer 1

That is because return breaks the function. You could use something like this:

function searcharray($value, $key, $array) {
    $result = array();    
    foreach ($array as $k => $val) {
        if ($val[$key] == $value) {
            $result[] = $k;
        }
    }
    return $result;
}

Now you will always get an array as result - empty if nothing was found. You can work with this like this e.g.

$mydevicekeys = searcharray($ptn2, "mydevice", $newresult);
foreach ($mydevicekeys as $mydevicekey) {
    // work with $newresult[ $mydevicekey ]["mydevice"]
}