How can you check for 'NULL' values in PHP?

To check for 'NULL' values in PHP, you can use the `is_null()` function. This function returns true if the variable is null and false otherwise. You can use this function to check if a variable contains a 'NULL' value before proceeding with any operations that might cause errors. 

$variable = null;

if (is_null($variable)) {
    echo "The variable is NULL";
} else {
    echo "The variable is not NULL";
}

Keywords

PHP NULL values isset() empty() is_null()

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