How php converts a string to a number and retains two decimal places

This article introduces the knowledge of "how php converts strings into numbers and retains two decimal places". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Php converts a string into a number and retains two decimal places: 1, with the number_format () function, syntax "number_format ($str, 2)"; 2, with floatval () and round () function, syntax "round (floatval ($str))".

Operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

Php converts a string to a number and retains two decimal places

1. Use the number_format () function

The number_format () function is used to convert strings to numbers. It returns the formatted number on success, otherwise it gives E_WARNING on failure.

2. Use the floatval () + round () function

The floatval () function converts a string to a floating-point number, while the round () function rounds a floating-point number, leaving two decimal places.

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