fprintf Functions in PHP
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The fprintf() function writes a formatted string to a specified output stream.
Syntax:fprintf(stream,format,arg1,arg2,arg++)
In above syntax, "stream" specifies where to write/output the string, "arg(s)" arguments are inserted with %-sign in the format string and "format" specifies the string and how to format the variables in it 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)
Example:
<?php
$str = "India";
$file = fopen("test.txt","w");
echo fprintf($file,"I love my %s.",$str);
?>
Output:
16
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