How can negating the is_numeric function affect the conditional statements in PHP?

Negating the is_numeric function in PHP can affect conditional statements by changing the logic of the condition. If is_numeric returns false, negating it with ! will make the condition true for non-numeric values. To solve this issue, you can remove the negation operator and use is_numeric directly in the condition to check if a value is numeric. 

$value = "123";

if (is_numeric($value)) {
    echo "Value is numeric";
} else {
    echo "Value is not numeric";
}

Keywords

is_numeric negating conditional statements PHP error types

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