Php fprintf
From w3cyberlearnings
Contents |
PHP function fprintf
This function writes a format string to a stream.
Syntax fprintf
- stream is file handler, where to write/output the string.
- format the string
- arg1, arg2,arg3..
List of format
- %% - Returns a percent sign
- %b - Binary number
- %c - The character according to the ASCII value
- %d - Signed decimal number
- %e - Scientific notation (e.g. 1.2e+2)
- %u - Unsigned decimal number
- %f - Floating-point number (local settings aware)
- %F - Floating-point number (not local settings aware)
- %o - Octal number
- %s - String
- %x - Hexadecimal number (lowercase letters)
- %X - Hexadecimal number (uppercase letters)
fprintf(stream,format,arg1,arg2,arg++)
Example 1
<?php
$string1 = 'Exciting of science fiction:';
$id_number = 88;
$file_handler = fopen('test1.txt', 'w');
fprintf($file_handler, 'Title: %s, and Code: %u', $string1, $id_number);
fclose($file_handler);
// test and open for reading the file to get the result
$file_name = 'test1.txt';
$file_handler = fopen($file_name, 'r');
$file_data = fread($file_handler, 1024);
fclose($file_handler);
echo ($file_data);
?>
Output
Title: Exciting of science fiction:, and Code: 88
Example 2
<?php
$person_aa = array('John' => 20, 'Marry' => 20, 'Bob' => 40, 'Kat' => 100);
$file_handler = fopen('test1.txt', 'w');
foreach ($person_aa as $name => $salary) {
fprintf($file_handler, 'Name: %s, Salary: %uK<br/>', $name, $salary);
}
fclose($file_handler);
// test and open for reading the file to get the result
$file_name = 'test1.txt';
$file_handler = fopen($file_name, 'r');
$file_data = fread($file_handler, 1024);
fclose($file_handler);
echo ($file_data);
?>
Output
Name: John, Salary: 20K Name: Marry, Salary: 20K Name: Bob, Salary: 40K Name: Kat, Salary: 100K
Example 3
<?php
if (!($fp = fopen('date.txt', 'w'))) {
return;
}
fprintf($fp, "%04d-%02d-%02d", date('Y'), date('m'), date('d'));
// will write the formatted ISO date to date.txt
?>
