What are the common mistakes or misconceptions that beginners might encounter when learning PHP array manipulation techniques?

One common mistake beginners make when learning PHP array manipulation techniques is not properly understanding how to access and modify array elements. It's important to remember that array indices start at 0 and that you can use square brackets to access elements. Additionally, some beginners may overlook the difference between array functions that modify the original array versus those that return a new array. 

// Incorrect way to access array element
$array = [1, 2, 3];
echo $array[3]; // This will result in an "Undefined offset" error

// Correct way to access array element
$array = [1, 2, 3];
echo $array[2]; // This will output 3

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PHP array manipulation beginners mistakes misconceptions

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