Why does converting a string to a double result in a value of 0?

When converting a string to a double in PHP using functions like `doubleval()` or type casting `(double)`, if the string contains non-numeric characters, the conversion will result in a value of 0. To solve this issue, you need to ensure that the string being converted contains only numeric characters or adjust your logic to handle non-numeric cases appropriately. 

// Example code snippet to convert a string to a double, handling non-numeric cases
$string = "123.45"; // Or any other numeric string
$doubleValue = doubleval($string);

// Check if the conversion resulted in 0 due to non-numeric characters
if ($doubleValue === 0 && !is_numeric($string)) {
    // Handle non-numeric cases here, such as setting a default value or showing an error message
}

Keywords

PHP string double type conversion value.

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