PHP printf() Function

PHP printf() Function

The printf() function in PHP outputs a formatted string.

The related functions of printf() function are as follows:

sprintf()
vprintf()
vsprintf()
fprintf()
vfprintf()

Syntax


printf ( string $format [, mixed $... ] )

printf ( string $format [, mixed $... ] )

Parameter

format(required)- This parameter formats the string which is composed of zero or more directives where the ordinary characters (excluding %) that are copied directly to the result and conversion specifications.

The possible format values are as follows:

%% – Returns a percent sign
%b – Binary number
%c – The character according to the ASCII value
%d – Signed decimal number (negative, zero or positive)
%e – Scientific notation using a lowercase (e.g. 1.2e+2)
%E – Scientific notation using a uppercase (e.g. 1.2E+2)
%u – Unsigned decimal number (equal to or greather than zero)
%f – Floating-point number (local settings aware)
%F – Floating-point number (not local settings aware)
%g – shorter of %e and %f
%G – shorter of %E and %f
%o – Octal number
%s – String
%x – Hexadecimal number (lowercase letters)
%X – Hexadecimal number (uppercase letters)

Return

This function returns the length of the outputted string.

Example 1


<?php
// initializing the number
$number = 123423;
// printing the number by printf() function
printf("%f",$number);
?>

<?php

// initializing the number

$number = 123423;

// printing the number by printf() function

printf("%f",$number);

Output


123423.000000

123423.000000

Example 2


<?php
//initializing the positive integer
$num1 = 123456789;
//initializing negative integer
$num2 = -123456789;
// passign a character value 
$char = 50; // The ASCII Character 50 is 2
echo "The binary value for ".$num1." is: ";
printf("%b",$num1); // Binary number
echo "\nThe ASCII character value for ".$char." is:  ";
printf("%c",$char); // The ASCII Character
echo "\nThe signed decimal value for ".$num2." is:  "; 
printf("%d",$num1); // Signed decimal number
?>

<?php

//initializing the positive integer

$num1 = 123456789;

//initializing negative integer

$num2 = -123456789;

// passign a character value

$char = 50; // The ASCII Character 50 is 2

echo "The binary value for ".$num1." is: ";

printf("%b",$num1); // Binary number

echo "\nThe ASCII character value for ".$char." is: ";

printf("%c",$char); // The ASCII Character

echo "\nThe signed decimal value for ".$num2." is: ";

printf("%d",$num1); // Signed decimal number

Output


The binary value for 123456789 is: 111010110111100110100010101
The ASCII character value for 50 is:  2
The signed decimal value for -123456789 is:  123456789

The binary value for 123456789 is: 111010110111100110100010101

The ASCII character value for 50 is: 2

The signed decimal value for -123456789 is: 123456789

Example 3


<?php
//initializing the positive integer
$num1 = 92345678;
//initializing negative integer
$num2 = -92345678; 
echo "The octal value for ".$num1." is: ";
printf("%o",$num1); // Octal number
echo "\nThe string value for ".$num1." is:  ";
printf("%s",$num1); // String 
echo "\nThe hexadecimal number in lowercase for ".$num2." is:  ";
printf("%x",$num2); // Hexadecimal number (lowercase)
echo "\nThe hexadecimal number in uppercase for ".$num2." is:  ";
printf("%X ",$num2); // Hexadecimal number (uppercase)
?>

<?php

//initializing the positive integer

$num1 = 92345678;

//initializing negative integer

$num2 = -92345678;

echo "The octal value for ".$num1." is: ";

printf("%o",$num1); // Octal number

echo "\nThe string value for ".$num1." is: ";

printf("%s",$num1); // String

echo "\nThe hexadecimal number in lowercase for ".$num2." is: ";

printf("%x",$num2); // Hexadecimal number (lowercase)

echo "\nThe hexadecimal number in uppercase for ".$num2." is: ";

printf("%X ",$num2); // Hexadecimal number (uppercase)

Output


The octal value for 92345678 is: 540212516
The string value for 92345678 is:  92345678
The hexadecimal number in lowercase for -92345678 is:  fffffffffa7eeab2
The hexadecimal number in uppercase for -92345678 is:  FFFFFFFFFA7EEAB2

The octal value for 92345678 is: 540212516

The string value for 92345678 is: 92345678

The hexadecimal number in lowercase for -92345678 is: fffffffffa7eeab2

The hexadecimal number in uppercase for -92345678 is: FFFFFFFFFA7EEAB2

Example 4


<?php
$str1 = "Hello PHP world";
// demonstrating the string specifiers
printf("\n%s",$str1);
printf("\n%8s",$str1);
printf("\n%-8s",$str1); 
printf("\n%08s",$str1); 
printf("\n%'*8s",$str1);
printf("\n%8.8s",$str1); 
?>

<?php

$str1 = "Hello PHP world";

// demonstrating the string specifiers

printf("\n%s",$str1);

printf("\n%8s",$str1);

printf("\n%-8s",$str1);

printf("\n%08s",$str1);

printf("\n%'*8s",$str1);

printf("\n%8.8s",$str1);

Output


Hello PHP world
Hello PHP world
Hello PHP world
Hello PHP world
Hello PHP world
Hello PH

Hello PHP world

Hello PH

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