What best practices should be followed to avoid issues with outputting undefined variables in PHP?

To avoid issues with outputting undefined variables in PHP, it is recommended to always check if a variable is set before trying to output it. This can be done using the isset() function or by using the null coalescing operator (??) to provide a default value if the variable is undefined. 

// Check if the variable is set before outputting it
if(isset($variable)){
    echo $variable;
} else {
    echo "Variable is not set";
}

Keywords

error_reporting isset strict_types debugging error handling

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