Is there a work around for number_format() in PHP5 returning NULL for empty strings?

We are currently migrating from PHP4 to PHP5 and have discovered an issue.

In PHP4, when we used the number_format() function on an empty string the output would be 0. However, in PHP5, running the same empty string through the number_format() function results in output of NULL. This has a ripple effect on a lot of our code that is not expecting NULL.

Is there a best-practice solution for this? Idea开发者_Go百科lly I'd like to be able to make the change at the number_format() call so that empty strings return 0 instead of NULL and not have to check all the possible places where the output may be used.

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Why not just check for an empty var before you pass it to number_format?

number_format(empty($var) ? '0' : $var);

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Empty isn't the only issue. Usually, any non-numeric should be 0.

number_format(is_numeric($var) ? $var : 0);

will render anything not a number to be zero.