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<?php
 
$a = [1,2,3];
 
foreach($a as &$v){
   $v++;
}
 
print_r($a);

Success #stdin #stdout 0.01s 20568KB

stdin

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Standard input is empty

stdout

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Array
(
    [0] => 2
    [1] => 3
    [2] => 4
)

https://ideone.com/g8JFTc

language:

PHP (php 7.3.5)

created:

visibility:

public

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