The difference between sprintf and printf function usage in php, sprintfprintf_PHP tutorial

The difference between the usage of sprintf and printf functions in php, sprintfprintf

The following is an example: rounding 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:

% means the starting character
0 means fill the empty space with 0
2 means there must be two digits after the decimal point
f means convert to floating point number

Convert characters
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
% Print out the percent symbol, Not converted.
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 integer to octal.
s Convert integers to strings.
x integer is converted to lowercase 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 then 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 does not print, but returns formatted text. Others are 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.