What is the purpose of using array_key_exists in PHP and what are its potential pitfalls?

The purpose of using array_key_exists in PHP is to check if a specific key exists in an array. This function returns true if the key is found and false if it is not found. One potential pitfall of using array_key_exists is that it only checks for the presence of the key, not the value associated with it. 

// Check if key 'name' exists in $array
if (array_key_exists('name', $array)) {
    echo 'Key "name" exists in the array.';
} else {
    echo 'Key "name" does not exist in the array.';
}

Keywords

array_key_exists PHP purpose pitfalls associative array

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