What are common pitfalls to avoid when comparing values in PHP arrays?

When comparing values in PHP arrays, a common pitfall to avoid is using the "==" operator, as it only checks for equality in terms of value, not type. To ensure both value and type are checked, use the "===" operator instead. This will prevent unexpected results when comparing values in arrays. 

// Incorrect comparison using the "==" operator
if ($array1['key'] == $array2['key']) {
    // code here
}

// Correct comparison using the "===" operator
if ($array1['key'] === $array2['key']) {
    // code here
}

Keywords

array_diff strict comparison in_array array_intersect type juggling

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