What potential issues can arise when manipulating numerical data in PHP for use with external services like Google?

One potential issue that can arise when manipulating numerical data in PHP for use with external services like Google is data type conversion errors. To avoid this issue, ensure that numerical data is properly formatted and converted to the appropriate data type before sending it to external services.

// Example of converting numerical data to the appropriate data type before using it with Google services
$numericData = "123"; // numerical data as a string
$numericValue = (int)$numericData; // convert the string to an integer

// Now $numericValue can be safely used with Google services