Are there potential pitfalls when using the ==, !=, ===, and !== operators in PHP, especially in complex expressions?

Using the == and != operators in PHP can lead to unexpected results due to type coercion, where values of different types are considered equal. To avoid this, it's recommended to use the strict comparison operators === and !==, which not only compare values but also their types. This helps prevent errors in complex expressions where type coercion can cause issues. 

// Example of using strict comparison operator
$value1 = 5;
$value2 = '5';

if ($value1 === $value2) {
    echo "Values are equal and of the same type.";
} else {
    echo "Values are not equal or of different types.";
}

Keywords

PHP operators type coercion comparison expressions

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