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

Grammar

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

Parameters	Description
Format	Necessary. Conversion format.
Arg1	Necessary. Specify the parameter to be inserted into the first% symbol in the format string.
Arg2	Optional. Specify the parameter to be inserted into the second% symbol in the format string.
arg++	Optional. Specify the parameters to be inserted into the format string at the third to fourth and so% symbols.

Description

The parameter format is the format of the transformation, starting with the percent sign ("%") to the end of the converted character. The following possible format values:
%%-return percent symbol
%b-Binary number
%c-Characters with ASCII values
%d-Signed decimal digits
%e-Continuous counting method (e.g. 1.5e+3)
%u-Unsigned decimal digits
%f-floating-point number (Local settings Aware)
%F-floating-point number (not local settings aware)
%o-Eight binary number
%s-String
%x-16 Number (small letter)
%x-16 Number (capital letter)
Arg1, arg2, + + etc parameters will be inserted into the main string of the percent semicolon (%) Symbol Place. The function is executed incrementally. In the first% symbol, insert arg1, insert arg2 at the second% symbol, and so on

Tips and comments
Note: If the% symbol is greater than the ARG argument, you must use a placeholder. Placeholders are inserted after the% symbol, consisting of numbers and "\$." See Example 3.

Example
Example 1

Copy Code code 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 code as follows:

<?php
$number = 123;
$txt = sprintf ("%f", $number);
Echo $txt;
?>

　

Output:

123.000000

Example 3

Copy Code code as follows:

<?php
$number = 123;
$txt = sprintf ("With 2 decimals:%1\$.2f<br/>with no decimals:%1\ $u", $number);
Echo $txt;
?>

Output:

Copy Code code as follows:

With 2 decimals:123.00
With no decimals:123

Example 4

Copy Code code as follows:

<?php
$ctype _primary = strtolower (' application ');
$ctype _secondary = strtolower (' pdf ');
$mimetype = sprintf ('%s/%s ', $ctype _primary, $ctype _secondary);
Echo $mimetype;
?>

Output:

Copy Code code as follows:

Application/pdf