php pass string to array() function

Question

Is there any way to pass string variable to array() function:

$ints = '112233,112234';
$arr = array($ints);

//instead of

$arr = array(112233,112234);

I know that there are plenty other ways, but passing the string is my only option:

$stArr = array();
foreach($dataTeacherAssWr[0]->getStudents() as $student) {
    $stArr[] = $student->getIdUser();
}
MyCacheManager::clearAssignmentCacheOnHomepageForUsers($_SESSION['id_user'], $stArr);

and the method:

public static function clearAssignmentCacheOnHomepageForUsers($teacherId, $studentId) {
    return self::clearAssignmentCacheOnHomepage(
        Array(
            'teacherIds' => array($teacherId),
            'studentIds' => array($studentId)
        )
    );
}

as you can see I can pass $studentId as "flat" ids in string

Answer 1

Try using the explode function to split the numbers separated by commas into an array...

explode(',', $ints);

With your example...

$ints = '112233,112234';
$arr = explode(',', $ints);

Produces the following output:

Array ( [0] => 112233 [1] => 112234 )

---

If you are looking to pass a string to the language construct array(), it simply cannot be done. You can give it a comma separated list for example array(112233, 112234); but you cannot give it array("112233,112234"); The array() documentation will explain what syntax it will accept.

It will not know that the comma separates a list of integers and that you want it split. All it cares is that you've given it a string, so it will create an array with a string in it. It's not a mind-reader, so you need to separate the values yourself.

Answer 2

You could use explode()

$array = explode(",", $string);

---

Input:

$string = '112233,112234';
$array = explode(",", $string);
var_dump($array);

Output:

array(2) { [0]=> string(6) "112233" [1]=> string(6) "112234" }

Answer 3

If you must have your data in a comma-separated string, you can simply explode it on the comma to get the array:

$ints = '112233,112234';
$arr = explode(',', $ints);

Answer 4

This is another way:

    $separator=",";
    $str="112233,112234,112235,112236,112237";
    $arr = explode($separator, $str);
    //print_r($arr);