$value = 10; // unsigned integer if (isUnsignedInt($value)) { // do something } else { echo "Not an unsigned integer."; }
$value = -5; // not an unsigned integer if (isUnsignedInt($value)) { // do something } else { echo "Not an unsigned integer."; }To determine the package library for the "isUnsignedInt" function, we need to look at the code implementation. If the function is defined in a specific file or class, we can determine the package library by examining the namespace or directory structure. If the function is part of a larger package or framework, we can usually find the package name in the code documentation or by searching online. Some common PHP validation libraries include Validator, Respect\Validation, and PHP-Validator.