get stuck: given an array like:
$customers = array(
'C00005' => 'My customer',
'C02325' => 'Another customer',
'C01945' => 'Another one',
'C00586' => 'ACME inc.'
)
and given a querystring like ?customerID=C01945 ($_GET['customerID'] = 'C01945' ), how can I filter the array so that it returns:
$customers = array(
'C01945' => 'Another one'
)
You can just use array_instersect_key:
$myKey = $_GET['customerID']; // You should validate this string
$result = array_intersect_key($customers, array($mykey => true));
// $result is [$myKey => 'another customer']
Try Using foreach
$customers = array(
'C00005' => 'My customer',
'C02325' => 'Another customer',
'C01945' => 'Another one',
'C00586' => 'ACME inc.'
);
$_GET['customerID'] = 'C01945';
$result = array();
foreach($customers as $key => $value){
if($_GET['customerID'] == $key){
$result[$key] = $value;
}
}
print_r($result);
Using array_walk
$customerID = 'C01945';
$result = array();
array_walk($customers,function($v,$k) use (&$result,$customerID){if($customerID == $k){$result[$k] = $v;}});
Simply do -
$res = !empty($customers[$_GET['customerID']]) ? array($_GET['customerID'] => $customers[$_GET['customerID']]) : false;
You can use false or something like that to identify empty value.
For PHP>=5.6:
$customers = array_filter($customers,function($k){return $k==$_GET['customerID'];}, ARRAY_FILTER_USE_KEY);
http://sandbox.onlinephpfunctions.com/code/e88bdc46a9cd9749369daef1874b42ad21a958fc
For earlier version you can help yourself with array_flip:
$customers = array_flip(array_filter(array_flip($customers),function($v){return $v==$_GET['customerID'];}));
