Which of the following PHP functions are related to constants?
- define(), defined(), constant()
- echo(), print(), printf()
- strlen(), strpos(), substr()
- array_push(), array_pop(), array_merge()
The functions define(), defined(), and constant() are related to constants in PHP. The define() function is used to define a constant, the defined() function checks if a constant is defined, and the constant() function retrieves the value of a constant. These functions are specifically designed to work with constants and provide convenient ways to create, check, and retrieve constant values. Learn more: https://www.php.net/manual/en/ref.constants.php
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