The difference between sprintf and printf function usage in php

The following is an example: round to two decimal places

<?php $num1 = 21;
echo sprintf("%0.2f",$num1)."<br />"; //输出 21.00
$num2 = 16.3287;
echo sprintf("%0.2f",$num2)."<br>"; //输出 16.33
$num3 = 32.12329;
echo sprintf("%0.2f",$num3)."<br>"; //输出 32.12 
?>

Explain the meaning of %0.2f:

% represents the starting character
0 represents the blank space filled with 0
2 represents that two decimal places must be occupied
f means converting to a floating point number

conversion character
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
% prints out the percent sign, no Convert.
b Convert integer to binary.
c Convert the integer into the corresponding ASCII character.
d Convert integer to decimal.
f times precision numbers are converted into floating point numbers.
o Convert integers to octal.
s Convert integers to strings.
x Convert integer to lower case hexadecimal.
X Convert integer to uppercase hexadecimal.

The difference between printf and sprintf

1. printf function:

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

Produces output according to format , which is described in the documentation for sprintf () .

Returns the length of the outputted string.

Format the text and output it, such as:

$name="hunte"; 
$age=25; 
printf("my name is %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 instead of printing, it returns formatted text. The rest is the same as printf.

3. Print function:

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

int print ( string arg )

Outputs arg . Returns 1 , always.

The above introduces the difference between the usage of sprintf and printf functions in PHP, including the relevant aspects. I hope it will be helpful to friends who are interested in PHP tutorials.