number_format() causes error "A non well formed numeric value encountered"

php number-formatting
Tu Hoang picture Tu Hoang · Jul 1, 2011 · Viewed 43.9k times · Source

I am using number_format to round floats to only 2 decimal digits. The problem is that some of my inputs don't have more than 2 decimals digits to begin with. So the code:

number_format($value, 2)

Instead of peacefully adding 0 in case it doesn't have enough decimal digits, it raises errors inside Apache log and that's not desirable.

So number_format(2.1, 2) or number_format(0, 2) will raise error in Apache log.

[Thu Jun 30 17:18:04 2011] [error] [client 127.0.0.1] PHP Notice: A non well formed numeric value encountered in /home/tahoang/Desktop/Projects/weatherData/weatherData.php on line 41

How to fix this?

Answer

Emre Yazici picture Emre Yazici · Jul 1, 2011

Try type casting first parameter of number_format() to float:

$format = number_format((float)0, 2);

or 

$format = number_format(floatval(0), 2);

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