What potential pitfalls should be avoided when working with arrays and loops in PHP, as seen in the provided code snippet?

One potential pitfall when working with arrays and loops in PHP is accessing array elements without verifying if they exist. This can lead to "Undefined offset" errors if the index is out of bounds. To avoid this issue, it's important to check if the index exists in the array before trying to access it within a loop. 

// Potential pitfall: accessing array elements without checking if they exist
$colors = ['red', 'green', 'blue'];
for ($i = 0; $i < count($colors); $i++) {
    echo $colors[$i]; // This can cause an "Undefined offset" error if $i is out of bounds
}

// Fix: Check if the index exists before accessing it
$colors = ['red', 'green', 'blue'];
for ($i = 0; $i < count($colors); $i++) {
    if (isset($colors[$i])) {
        echo $colors[$i];
    }
}

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