PHP: printf() function

Last update on October 04 2024 06:15:32 (UTC/GMT +8 hours)

PHP: Output a formatted string

The printf() function displays a formatted string from one or more arguments.

Version:

(PHP 4 and above)

Syntax:

printf(format ,arg1, arg2, arg3....)

Parameter:

Name	Description	Required / Optional	Type
format	Each conversion specification starts with a single percent sign (%) and ends with the following conversion characters. % - returns a percent sign. b - the argument is treated as an integer and display it as a binary number. c - the argument is treated as an integer and display it as a an ASCII value. d - the argument is treated as an integer and display as a signed decimal number. e - the argument is treated as scientific notation (e.g. 1.2e+2). E - the argument treated as scientific notation (e.g.1.2E+2). u - the argument is treated as an integer, and display as an unsigned decimal number. f- the argument is treated as a float, and display as a floating-point number. (local aware) F - the argument is treated as a float, and display as a floating-point number (non-locale aware). g - shorter of %e and %f. G - shorter of %E and %f. o- the argument is treated as an integer, and display as an octal number. s - the argument is treated as string and display as a string. x - the argument is treated as an integer and display as a hexadecimal number (with lowercase letters). X - the argument is treated as an integer and display as a hexadecimal number (with uppercase letters). Optional specification : Sign specifier : display a sign (+ or -) in front a number. By default, a - sign is used in front of a number if it is negative. Padding character : Default character is space. An alternate padding character can be specified by prefixing it with a single quote. Alignment specifier. : - character makes the alignment left-justified. The default is right justified. Width specifier : An integer number specifies the width of the field. Precision specifier : The argument specifies how many decimal number should be displayed for floating numbers. When using this specifier on a string, it acts as a cutoff point, setting a maximum character limit to the string.	Required	String
arg1	The argument to be added as the first %-sign in the formatted string.	Required	Mixed
arg2, arg3....	These arguments will be added as second %, third % etc. in the formatted string.	Optional	Mixed

*Mixed : Mixed indicates that a parameter may accept multiple (but not necessarily all) types.

Return value:

Returns the length of the outputted string.

Value Type: Integer.

Pictorial Presentation

php-string-printf()

Example:

<?php
$string1 = "Hello";
$var1 = 12;
printf('%s, we are learning the %uth chapter of PHP.',$string1, $var1);
?>

Output :

Hello, we are learning the 12th chapter of PHP.

View the example in the browser

See also

PHP Function Reference

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