Definition and usage of sprintf in php _ PHP Tutorial

Sprintf definition and usage in php. The sprintf () function is used to write formatted strings into a variable. The sprintf () function is used to write formatted strings into a variable. The syntax sprintf (format, a sprintf () function is used to write formatted strings into a variable.

Definition and usage
The sprintf () function is used to write formatted strings into a variable.

Syntax
Sprintf (format, arg1, arg2, arg ++) parameter description
Format is required. Conversion format.
Arg1 is required. Specifies the parameter inserted at the first % symbol in the format string.
Optional. Specifies the parameter inserted at the second % symbol in the format string.
Optional. Specifies the parameters inserted to the third, fourth, and other % symbols in the format string.

Description
The format parameter is the conversion format. it starts with the percent sign ("%") and ends with the conversion character. The following possible format values:

• %-Return percent sign
• % 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

The code is as follows:
?

Output:

? Hello world. Day number 123
Example 2

The code is as follows:
?

　　

Output:

? 123.000000
Example 3

The code is as follows:
? With no decimals: % 1 $ u ", $ number); echo $ txt;?>

Output:

? With 2 decimals: 123.00 With no decimals: 123
Example 4

The code is as follows:
? Output: ? Application/pdf

The http://www.bkjia.com/PHPjc/445309.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/445309.htmlTechArticlesprintf () function is used to write formatted strings into a variable. The sprintf () function is used to write formatted strings into a variable. Syntax sprintf (format,...