sprintf in PHP differs from printf function usage

Here's an example: rounding to keep the two digits after the decimal point

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<?php $num 1 = 21; Echo sprintf ("%0.2f", $num 1). " <br/> "; Output 21.00 $num 2 = 16.3287; Echo sprintf ("%0.2f", $num 2). " <br/> "; Output 16.33 $num 3 = 32.12329; Echo sprintf ("%0.2f", $num 3). " <br/> "; Output 32.12 Www.111Cn.net ?>

Explain the meaning of the%0.2f:

% indicates starting character
0 means the vacancy is filled with 0.
2 indicates that two digits must be taken after the decimal point
f indicates conversion to floating-point number

Convert character
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
% print percent symbol, do not convert.
The b integer is converted into binary.
The c integer is converted to the corresponding ASCII character.
The d integer is turned into 10.
The F times the precision number is converted to floating point numbers.
The o integer is converted into octal.
The s integer turns into a string.
The x integer is converted to lowercase 16.
The X integer is converted to uppercase 16.

The difference between printf and sprintf

1. printf function:

int printf (string format [, mixed args [, mixed ...]])

Produces output according to format, which are described in the documentation for SPRINTF ().

Returns the length of the outputted string.

Format the text after the output, such as:

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$name = "Hunte"; $age = 25; printf ("My name was%s, age%d", $name, $age);

2. sprintf function:
String sprintf (string format [, mixed args [, mixed ...]])

Returns a string produced according to the formatting string format.

Similar to printf, but does not print, but returns the formatted text, the rest is the same as printf.

3. Print function:

is a function that can return a value and can have only one argument.

int print (string arg)

Outputs Arg. Returns 1, always.