Question

How to use reference variable to change array elements in PHP

Answer 1

$arr = array(1, 2, 3, 4, 5);
foreach ($arr as &$value) {
    $value = $value + 10;
}

foreach ($arr as $element) 
    echo $element . " ";


/*
run:

11 12 13 14 15

*/

 

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Answer 2

foreach (array(1, 2, 3, 4, 5) as &$value) {
    $value = $value + 10;
    echo $value . " ";
}


/*
run:

11 12 13 14 15

*/

 

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