PHP fprintf() Function

P
PHP explode() Function
PHP hex2bin() Function

In this article, you will learn about the PHP FPRINTF() function. It writes formatted string to the output stream such as database or file.

The % (percent) sign in the main string is replaced by the argument_1, argument_2 and ++. This function processes in step by step manner. At the first % sign, argument_1 is inserted and then for the second % sign, second argument is inserted.

Note: In case of more % (percent) signs, placeholders are used. So that, the output contains placeholder after the % sign and contains the argument number and “\$” sign.

What is the syntax of the fprintf() function in php?

fprintf(stream,format,arg1,arg2,arg++)
ParametersDetails
streamRequired. Specifies where to write/output the string
formatRequired. Specifies the string and how to format the variables in it.Possible format values:%% – 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)Additional format values. These are placed between the % and the letter (example %.2f):+ (Forces both + and – in front of numbers. By default, only negative numbers are marked)’ (Specifies what to use as padding. Default is space. Must be used together with the width specifier. Example: %’x20s (this uses “x” as padding)- (Left-justifies the variable value)[0-9] (Specifies the minimum width held of to the variable value).[0-9] (Specifies the number of decimal digits or maximum string length)Note: If multiple additional format values are used, they must be in the same order as above.
arg1Required. The argument to be inserted at the first %-sign in the format string
arg2Optional. The argument to be inserted at the second %-sign in the format string
arg++Optional. The argument to be inserted at the third, fourth, etc. %-sign in the format string
PHP FPRINTF() function

examples of the fprintf() function

Example 1. In this example, we just write some text to a db or file and the FPRINTF() method.

<?php
$n = 123;
$file = fopen("test.txt","w");
fprintf($file,"%f",$n);
?>

Example 2. In the following example, we tested all the possible formates with the fprintf() function.

PHP explode() Function
PHP hex2bin() Function

Add comment

Tutor Network

Share this

Learn PHP from A to Z