Hàm vfprintf() trong PHP

<?php
$file = "data.txt";

// Open the file for writing
$handle = fopen($file, "w") or die("ERROR: Cannot open the file.");

// Sample array
$argarray = array("50", "United States");

// Defining the format string
$format = "There are %d states in the %s.";

// Formatting and write the string to file
$length = vfprintf($handle, $format, $argarray);

echo "Wrote $length bytes to data.txt";
?>

<?php
$file = "data.txt";

// Open the file for writing
$handle = fopen($file, "w") or die("ERROR: Cannot open the file.");

// Sample array
$array = array('star');

// Defining the format string
$format = 'The polar %1$s is the brightest %1$s in the sky.';

// Formatting and write the string to file
$length = vfprintf($handle, $format, $array);

echo "Wrote $length bytes to data.txt";
?>

<?php
$file = "data.txt";

// Open the file for writing
$handle = fopen($file, "w") or die("ERROR: Cannot open the file.");

// Sample array
$array = array(499);

// Defining the format string
$format = "The number without decimal points: %1\$d, and the number with two decimal points: %1\$.2f";

// Formatting and write the string to file
$length = vfprintf($handle, $format, $array);

echo "Wrote $length bytes to data.txt";
?>

<?php
$file = "data.txt";

// Open the file for writing
$handle = fopen($file, "w") or die("ERROR: Cannot open the file.");

// Sample array
$array = array("50", "United States");

// Defining the format string
$format = "The %2\$s is a federal republic of %1\$d states.";

// Formatting and write the string to file
$length = vfprintf($handle, $format, $array);

echo "Wrote $length bytes to data.txt";
?>

<?php
// Sample integers
$num1 = 123456789;
$num2 = -123456789;
$num3 = 65; // ASCII 65 is 'A'

// Notice the double %%, this simply prints a '%' character
printf("%%b = %b <br>", $num1); // Binary representation
printf("%%c = %c <br>", $num3); // The ASCII Character
printf("%%d = %d <br>", $num1); // Standard integer representation
printf("%%d = %d <br>", $num2); // Standard integer representation
printf("%%e = %e <br>", $num1); // Scientific notation (lowercase)
printf("%%E = %E <br>", $num1); // Scientific notation (uppercase)
printf("%%u = %u <br>", $num1); // Unsigned integer representation (positive)
printf("%%u = %u <br>", $num2); // Unsigned integer representation (negative)
printf("%%f = %f <br>", $num1); // Floating-point representation (locale aware)
printf("%%F = %F <br>", $num1); // Floating-point representation (non-locale aware)
printf("%%g = %g <br>", $num1); // Shorter of %e and %f
printf("%%G = %G <br>", $num1); // Shorter of %E and %f
printf("%%o = %o <br>", $num1); // Octal representation
printf("%%s = %s <br>", $num1); // String representation
printf("%%x = %x <br>", $num1); // Hexadecimal representation (lowercase)
printf("%%X = %X <br>", $num1); // Hexadecimal representation (uppercase)
printf("%%+d = %+d <br>", $num1); // Sign specifier (positive)
printf("%%+d = %+d <br>", $num2); // Sign specifier (negative)
?>

<?php
$str1 = "Hello";
$str2 = "Hello Alexander!";

printf("[%s]<br>", $str1);     // Standard string output
printf("[%10s]<br>", $str1);   // Right-justifies the string with spaces
printf("[%-10s]<br>", $str1);  // Left-justifies the string value with spaces
printf("[%010s]<br>", $str1);  // Left-pads string with zeros.
printf("[%-010s]<br>", $str1); // Right-pads string with zeros
printf("[%'#10s]<br>", $str1); // Left-pads string with '#' character
printf("[%.10s]<br>", $str2);  // Cuts off string after 10 characters
?>