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

Grammar

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

参数	描述
format	必需。转换格式。
arg1	必需。规定插到 format 字符串中第一个 % 符号处的参数。
arg2	可选。规定插到 format 字符串中第二个 % 符号处的参数。
arg++	可选。规定插到 format 字符串中第三、四等等 % 符号处的参数。

Description

The parameter format is the conversion format, starting with the percent sign ("%") and ending with the conversion character. Possible format values ​​below:
%% - Returns percent symbol
%b - Binary number
%c - Character according to ASCII value
%d - Signed decimal Number
%e - continuous notation (such as 1.5e+3)
%u - unsigned decimal number
%f - floating point number (local settings aware)
%F - floating point number ( not local settings aware)
%o - octal number
%s - string
%x - hexadecimal number (lower case letters)
%X - hexadecimal number (upper case letters) )
arg1, arg2, ++ and other parameters will be inserted into the main string at the percent sign (%) symbol. This function is executed step by step. At the first % sign, insert arg1, at the second % sign, insert arg2, and so on

Tips and Notes
Note: If there are more % signs than arg arguments, you must Use placeholders. The placeholder is inserted after the % symbol and consists of a number and "$". See example 3.

Example
Example 1

Copy code The 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 2

Copy code The code is as follows:

$number = 123;
$txt = sprintf("%f",$number) ;
echo $txt;
?>

Output:

123.000000

Example 3

Copy code The code is as follows:

$number = 123;
$txt = sprintf("With 2 decimals: %1$.2f
With no decimals: %1$u",$number);
echo $txt;
?>

Output:

Copy code The code is as follows:

With 2 decimals: 123.00
With no decimals: 123

Example 4

Copy code The code is as follows:

$ctype_primary = strtolower('application ');
$ctype_secondary = strtolower('pdf');
$mimetype = sprintf('%s/%s', $ctype_primary, $ctype_secondary);
echo $mimetype;
? >

Output:

Copy code The code is as follows:

application/pdf

http://www.bkjia.com/PHPjc/325510.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/325510.htmlTechArticleSyntax sprintf(format,arg1,arg2,arg++) Parameter Description format required. Convert format. arg1 required. Specifies the parameters to be inserted at the first % sign in the format string. arg2 optional. Regulations...