I have an array looking like this:
$user = array();
$user['albert']['email'] = '[email protected]';
$user['albert']['someId'] = 'foo1';
$user['berta']['email'] = '[email protected]';
$user['berta']['someId'] = 'bar2';
Now I want to find out which user has a certain someId. In this example I want to know who has the someId bar2 and want the result berta. Is there a decent php function for this or would I have to create this on my own?
$id = 'bar2';
$result = array_filter(
$user,
function($u) use($id) { return $u['someId'] === $id; }
);
var_dump($result);
Note: this works in PHP 5.3+.
Note 2: there is no reason to use any version below nowadays.
array_filter() seems to be a great function, a shame I missed it until now. One question: Why are you using === to compare? I know what it means and what the difference to == is, but my PHP days have been some years ago. Is it better (or safer) to always use === instead of == nowadays?Try this function it will return array of the matches.
function search_user($id) {
$result = new array();
foreach($user as $name => $user) {
if ($user['someId'] == 'SOME_ID') {
$result[] = $user;
}
}
return $result;
}
if you always have one user with same id then you can just return one user, and throw exception otherwise
function search_user($id) {
$result = new array();
foreach($user as $name => $user) {
if ($user['someId'] == 'SOME_ID') {
$result[] = $user;
}
}
switch (count($result)) {
case 0: return null;
case 1: return $result[0];
default: throw new Exception("More then one user with the same id");
}
}
idas the key of the array which would allow you to retrieve the data for a given record by simply using the key directly? e.g.$username = $user[$id]['name']. This seems the more logical way to structure your data and how a database is likely to index the records.someIdinstead ofid, possibly should have picked more concrete names for this example though.