How can undefined constant warnings be resolved in PHP scripts?

When encountering undefined constant warnings in PHP scripts, it means that a constant is being used without being defined. To resolve this issue, you can define the constant using the define() function before using it in your code. 

define('MY_CONSTANT', 'my_value');

// Now you can use the constant without any warnings
echo MY_CONSTANT;

Keywords

PHP constant warnings error_reporting define

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