What potential pitfalls can arise when attempting to redefine TRUE and FALSE constants in PHP?

Redefining the TRUE and FALSE constants in PHP can lead to confusion and unexpected behavior in your code, as these constants are predefined by the language itself. To avoid this issue, it's recommended to use your own custom constants instead of trying to redefine TRUE and FALSE. 

// Define custom constants instead of redefining TRUE and FALSE
define('MY_TRUE', true);
define('MY_FALSE', false);

// Usage of custom constants
if (MY_TRUE) {
    echo 'This is true';
}

if (MY_FALSE) {
    echo 'This is false';
}

Keywords

constants redefinition TRUE FALSE PHP

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