What are some common pitfalls when checking the return values of PHP functions?

Common pitfalls when checking the return values of PHP functions include not using strict comparison operators like '===' or not checking for specific error codes. To solve this, always use strict comparison operators to ensure the return value matches the expected type and value. Additionally, check for specific error codes or values to handle different scenarios appropriately. 

// Incorrect way of checking return value
$result = someFunction();
if ($result) {
    // Handle success
} else {
    // Handle failure
}

// Correct way of checking return value
$result = someFunction();
if ($result === true) {
    // Handle success
} elseif ($result === false) {
    // Handle failure
} else {
    // Handle other scenarios
}

Keywords

return values PHP functions error handling error types validation

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