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

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Conversion and retention of two decimal places: 1, use the "floatval (string)" statement to convert the string to double type; 2, use the "number_format (double type value, 2)" or "sprintf (% .2f", double type value) "statement to retain two decimal places.

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

Php converts the string to double and retains two decimal places

You can see two parts:

Convert string to double type: use floatval ()

Two decimal places that retain the sprintf value: using the number_format () or sprintf () function

Number_format () can format numbers by grouping them in thousands.

The sprintf () function writes the formatted string to a variable.

Sample code:

Description:

When using the number_format () or sprintf () function to retain two decimal places, if the rounded value is greater than 5, it will be rounded.

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