Application of PHP sprintf () function (definition and usage) _php tutorial

Grammar

sprintf (format,arg1,arg2,arg++)

Parameters	Description
Format	Necessary. Conversion format.
Arg1	Necessary. Specifies the parameter that is inserted into the first% symbol in the format string.
Arg2	Optional. Specifies the parameter that is inserted into the second% symbol in the format string.
arg++	Optional. Specifies the parameter that is inserted into the format string third to fourth, and so on, in the% symbol.

Description

Parametersformatis the converted format, starting with the percent sign ("%") to the end of the converted character. The following possibleformatValue:
Percent-return percentage symbol
%b-Binary number
%c-Characters in accordance with ASCII values
%d-Signed decimal number
%e-Sustainable counting method (e.g. 1.5e+3)
%u-Unsigned decimal number
%f-Floating point (Local settings Aware)
%F-Floating point number (not local settings aware)
%o-Eight binary number
%s-String
%x-16 binary number (lowercase letters)
%x-16 decimal digits (uppercase letters)
Arg1, arg2, + + etc parameters will be inserted into the main string percent percent (%) Symbol. This function is executed step-by. In the first% symbol, insert arg1, insert arg2 at the second% symbol, and so on

Hints and Notes
Note: If the% symbol is more than the arg parameter, you must use a placeholder. The placeholder is inserted after the% symbol and consists of a number and a "\$". See Example 3.

Example
Example 1
Copy CodeThe code is as follows:
?
$str = "Hello";
$number = 123;
$txt = sprintf ("%s World". Day number%u ", $STR, $number);
Echo $txt;
?>

Output:

Hello World. Day Number 123

Example 2
Copy CodeThe code is as follows:
$number = 123;
$txt = sprintf ("%f", $number);
Echo $txt;
?>
　

Output:

123.000000

Example 3
Copy CodeThe code is as follows:
$number = 123;
$txt = sprintf ("With 2 decimals:%1\$.2f
With no decimals:%1\ $u ", $number);
Echo $txt;
?>

Output:
Copy CodeThe code is as follows:
With 2 decimals:123.00
With no decimals:123

Example 4
Copy CodeThe code is as follows:
$ctype _primary = strtolower (' application ');
$ctype _secondary = strtolower (' pdf ');
$mimetype = sprintf ('%s/%s ', $ctype _primary, $ctype _secondary);
Echo $mimetype;
?>

Output:
Copy CodeThe code is as follows:
Application/pdf

http://www.bkjia.com/PHPjc/325510.html www.bkjia.com true http://www.bkjia.com/PHPjc/325510.html techarticle The Syntax sprintf (format,arg1,arg2,arg++) parameter describes the format required. Conversion format. Arg1 required. Specifies the parameter that is inserted into the first% symbol in the format string. Arg2 is optional. Regulations ...

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