Analysis of the difference between sprintf and printf function usage in php_PHP tutorial

Here is an example: round to two decimal places

Copy code The code is as follows:

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

Explain the meaning of %0.2f:

% means the starting character
0 means fill the 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 integer to 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 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 then output it, such as:

Copy code The code is as follows:

$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.

http://www.bkjia.com/PHPjc/825226.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/825226.htmlTechArticleThe following is an example: rounding to two decimal places. Copy the code. The code is as follows: ?php $num1 = 21; echo sprintf("%0.2f",$num1)."br /"; //Output 21.00 $num2 = 16.3287; echo sp...