PHP fprint() 函數

PHP fprint() 函數用于向流中寫入格式化的字符串。愛掏網 - it200.com換句話說，我們可以說這個函數將字符串格式化到指定的輸出流（文件或數據庫）中。愛掏網 - it200.com

fprintf(stream,format,arg1,arg2,arg++)

示例1

<?php
number = 9;str = "javatpoint";
file = fopen("test.txt","w");
echo fprintf(file,"There are %u million bicycles in %s.",number,str);
?>

輸出:

43

示例2

<?php
num1 = 123456789;num2 = -123456789;
char = 50; // The ASCII Character 50 is 2

// Note: The format value "%%" returns a percent sign
printf("%%b = %b <br>",num1); // Binary number
printf("%%c = %c <br>",char); // The ASCII Character
printf("%%d = %d <br>",num1); // Signed decimal number
printf("%%d = %d <br>",num2); // Signed decimal number
printf("%%e = %e <br>",num1); // Scientific notation (lowercase)
printf("%%E = %E <br>",$num1); // Scientific notation (uppercase)
?>

輸出：

%b = 111010110111100110100010101 
%c = 2 
%d = 123456789 
%d = -123456789 
%e = 1.234568e+8 
%E = 1.234568E+8 

示例3

<?php
num1 = 123456789;num2 = -123456789;
char = 50; // The ASCII Character 50 is 2
// Note: The format value "%%" returns a percent sign
printf("%%u = %u <br>",num1); // Unsigned decimal number (positive)
printf("%%u = %u <br>",num2); // Unsigned decimal number (negative)
printf("%%f = %f <br>",num1); // Floating-point number (local settings aware)
printf("%%F = %F <br>",num1); // Floating-point number (not local settings 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 number
?>

輸出：

%u = 123456789 
%u = 4171510507 
%f = 123456789.000000 
%F = 123456789.000000 
%g = 1.23457e+8 
%G = 1.23457E+8 
%o = 726746425 

示例4

<?php
num1 = 123456789;num2 = -123456789;
char = 50; // The ASCII Character 50 is 2
printf("%%s = %s <br>",num1); // String
printf("%%x = %x <br>",num1); // Hexadecimal number (lowercase)
printf("%%X = %X <br>",num1); // Hexadecimal number (uppercase)
printf("%%+d = %+d <br>",num1); // Sign specifier (positive)
printf("%%+d = %+d <br>",num2); // Sign specifier (negative)*/
?>

輸出：

%s = 123456789 
%x = 75bcd15 
%X = 75BCD15 
%+d = +123456789 
%+d = -123456789