What are some common mistakes in the provided PHP code, such as incorrect variable initialization and usage?

One common mistake in the provided PHP code is the incorrect variable initialization and usage. For example, the variable `$sum` is being initialized inside the loop, which will reset its value in each iteration. To solve this issue, the variable should be initialized outside the loop to accumulate the total sum correctly. 

// Incorrect variable initialization and usage
$numbers = [1, 2, 3, 4, 5];
$sum = 0;

foreach ($numbers as $number) {
    $sum = $number; // Incorrect: resets the value of $sum in each iteration
}

echo $sum; // Output will be the last number in the array (5) instead of the sum (15)

// Correct variable initialization and usage
$numbers = [1, 2, 3, 4, 5];
$sum = 0;

foreach ($numbers as $number) {
    $sum += $number; // Correct: accumulates the sum correctly
}

echo $sum; // Output will be the correct sum (15)

Keywords

variable initialization variable usage PHP code common mistakes error types

Related Questions