How can references be utilized in PHP to ensure variables are correctly passed and modified within a loop?

When passing variables within a loop in PHP, references can be used to ensure that variables are correctly modified. By passing variables by reference, any changes made to the variable within the loop will reflect outside of the loop as well. This can be particularly useful when working with large arrays or objects that need to be modified within a loop. 

// Example of utilizing references in PHP to ensure variables are correctly passed and modified within a loop
$numbers = [1, 2, 3, 4, 5];

foreach ($numbers as &$number) {
    $number *= 2; // Multiply each number by 2
}

print_r($numbers); // Output: Array ( [0] => 2 [1] => 4 [2] => 6 [3] => 8 [4] => 10 )

Keywords

References PHP variables loop modification

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