What are some potential pitfalls of using tolerance in comparison operations in PHP?

Using tolerance in comparison operations in PHP can lead to unexpected results due to floating-point precision issues. To avoid this, it is recommended to use a small threshold value for comparisons instead of relying on exact equality. 

$threshold = 0.0001;

if(abs($num1 - $num2) < $threshold) {
    // numbers are considered equal within the threshold
    echo "Numbers are equal within the threshold.";
} else {
    // numbers are not considered equal
    echo "Numbers are not equal.";
}

Keywords

type juggling loose comparison strict comparison data types error handling

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