Php format number: add 0 to complement the number before the number of digits is insufficient

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

Php format number: add 0 to complement the number before the number of digits is insufficient

Instance first, and then explain

 

PHP code

2. $ Var = sprintf ("% 04d", 2); // Generate four digits. if not, add 0.
3. Echo $ var; // result 0002
4. ?>

PHP string sprintf () function

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.

 

PHP code

2. $ Number = 123;
3. $ Txt = sprintf ("% f", $ number );
4. Echo $ txt;
5. ?>