How can PHP developers handle non-numeric values encountered in their code?

When PHP developers encounter non-numeric values in their code, they can use functions like is_numeric() or filter_var() to check if a variable is numeric before performing any operations on it. If a non-numeric value is encountered, developers can choose to handle it by either skipping the operation, setting a default value, or displaying an error message to the user. 

$value = "abc";

if(is_numeric($value)){
    // perform operations on numeric value
    echo "Value is numeric: " . $value;
} else {
    // handle non-numeric value
    echo "Value is not numeric";
}

Keywords

type juggling is_numeric filter_var error handling data validation

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