How can one streamline the code for checking variable existence and content in PHP?

When checking for the existence and content of variables in PHP, we can streamline the code by using the `isset()` function to check if a variable is set and not null, and the `empty()` function to check if a variable is empty. This helps to reduce the number of lines of code needed for these checks. 

// Check if variable $name exists and is not empty
if(isset($name) && !empty($name)) {
    // Variable $name exists and is not empty
    echo "Variable \$name is set and not empty.";
} else {
    // Variable $name does not exist or is empty
    echo "Variable \$name is either not set or empty.";
}

Keywords

isset empty null coalescing operator ternary operator error suppression

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