PHP sprintf () function application (Definition and usage)

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• Syntax
• Description

Syntax

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

Parameters	Description
Format	Required. Conversion format.
Arg1	Required. Specifies the parameter inserted at the first % symbol in the format string.
Arg2	Optional. Specifies the parameter inserted at the second % symbol in the format string.
Arg ++	Optional. Specifies the parameters inserted to the third, fourth, and other % symbols in the format string.

Description

ParametersFormatIs the conversion format, starting from the percent sign ("%") to the end of the conversion character. PossibleFormatValue:
%-Percentage sign returned
% B-binary number
% C-Characters Based on ASCII values
% D-Signed decimal number
% E-resumable counting (for example, 1.5e + 3)
% U-Unsigned decimal number
% F-floating point number (local settings aware)
% F-floating point number (not local settings aware)
% O-octal values
% S-string
% X-hexadecimal (lowercase letter)
% X-hexadecimal (uppercase letters)
Parameters such as arg1, arg2, ++ are inserted to the percent sign (%) in the main string. This function is executed step by step. In the first % symbol, insert arg1, at the second % symbol, insert arg2, and so on.

Tips and comments
Note: If the % symbol is greater than the arg parameter, you must use a placeholder. The placeholder is inserted after the % symbol, which consists of numbers and "\ $. See example 3.

Example
Example 1

Copy codeThe Code is as follows :?
<? Php
$ Str = "Hello ";
$ Number = 123;
$ Txt = sprintf ("% s world. Day number % u", $ str, $ number );
Echo $ txt;
?>

Output:

Hello world. Day number 123

Example 2Copy codeThe Code is as follows: <? Php
$ Number = 123;
$ Txt = sprintf ("% f", $ number );
Echo $ txt;
?>

　

Output:

123.000000

Example 3Copy codeThe Code is as follows: <? Php
$ Number = 123;
$ Txt = sprintf ("With 2 decimals: % 1 \ $. 2f <br/> 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 4Copy codeThe Code is as follows: <? Php
$ 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