What best practices can be followed when working with arrays in PHP to avoid errors and improve efficiency?

When working with arrays in PHP, it is important to check if an array key exists before trying to access it to avoid errors. This can be done using the `isset()` function. Additionally, using functions like `array_key_exists()` can help in checking for the existence of a key in an array. By following these best practices, you can prevent errors and improve the efficiency of your PHP code. 

// Check if a key exists in an array before accessing it
if(isset($array['key'])) {
    // Access the key safely
    $value = $array['key'];
} else {
    // Handle the case where the key does not exist
    $value = null;
}

Keywords

array functions error handling efficiency data validation type checking

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