What are some best practices for ensuring full boolean evaluation in PHP code?

When working with boolean values in PHP, it's important to ensure that full boolean evaluation is achieved. One common mistake is using loose comparisons (==) instead of strict comparisons (===) when checking boolean values. To ensure full boolean evaluation, always use strict comparisons to accurately check for true or false values. 

// Incorrect way using loose comparison
$bool = "false";
if ($bool == true) {
    echo "This will be executed even though 'false' is a string.";
}

// Correct way using strict comparison
$bool = "false";
if ($bool === true) {
    echo "This will not be executed because 'false' is not strictly equal to true.";
}

Keywords

short-circuit evaluation type coercion strict comparison truthy values falsy values

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