当0.00是可接受的值时，检查执行字符串到浮点转换的错误

Question

I am currently looking for the most elegant way, to do error-checking on a string to float conversion, when 0.00 shall be an accepted value, but non-numeric characters shall lead to a bailout. Currently I am thinking of testing the string for any other chars than ","/"." or "[0-9]". I`d just like to know, if there is a more elegant/shorter way. Thanks in advance, Oliver !

Answer 1

PHP has a built in function for this.

is_float()

Examples:

is_float(27.25); // This would be true

is_float('abc'); // This would be false