Select certain data in PHP Array - php

Question

I get the following output when using this line of code var_dump($ticket->find()); How would I access only the identifiers throughout ALL objects?
I tried var_dump($ticket->find()->identifier); but it returned null.
array (size=2)
0 =>
object(stdClass)[9]
public 'tid' => string '1' (length=1)
public 'uid' => string '22' (length=2)
public 'subject' => string 'iPhone 8' (length=8)
public 'issue' => string 'iPhone 8 screen replacement' (length=27)
public 'device' => string 'iPhone 8' (length=8)
public 'created' => string '2017-05-25 00:01:11' (length=19)
public 'identifier' => string '29cd54bf' (length=8)
public 'status' => string 'New' (length=3)
public 'tech' => string 'None' (length=4)
1 =>
object(stdClass)[11]
public 'tid' => string '2' (length=1)
public 'uid' => string '22' (length=2)
public 'subject' => string 'iPhone 7' (length=8)
public 'issue' => string 'iPhone 7 screen replacement' (length=27)
public 'device' => string 'iPhone 7' (length=8)
public 'created' => string '2017-05-25 00:27:42' (length=19)
public 'identifier' => string 'b47f2c82' (length=8)
public 'status' => string 'New' (length=3)
public 'tech' => string 'None' (length=4)

Answer 1

You could use array_map to select the properties that you need from each item in the array returned by find:
$filteredFields = array_map(function ($item) {
// Return whatever properties you want here:
return [$item->tid, $item->$uid, $item->issue];
}, $ticket->find());
$filteredFields will be an array of arrays:
array(2) {
[0]=> array(3) {
[0]=> string(1) "1"
[1]=> string(2) "22"
[2]=> string(8) "iPhone 7"
}
[1]=> array(3) {
[0]=> string(1) "2"
[1]=> string(2) "22"
[2]=> string(8) "iPhone 7"
}
}
If you just need one of the properties, it may be easier to use array_column:
$subjectFields = array_column($ticket->find(), "subject");
This will return something that looks like this:
array(2) {
[0]=> string(8) "iPhone 8"
[1]=> string(8) "iPhone 7"
}
You can also get an associative array indicating which field to use as the key with the third parameter:
$subjectsByTid = array_column($ticket->find(), "subject", "tid");
This will return:
array(2) {
["1"]=> string(8) "iPhone 8"
["2"]=> string(8) "iPhone 7"
}