Analysis of sprintf() function in php (with code example)

In the previous article we introduced "Two ways to generate random numbers in php", this article will introduce the sprintf() function . PHP may need to include multiple variables continuously when outputting a string. If you use echo directly, you need to splice each variable and the string, which will be troublesome, so we can use sprintf() function to solve this problem.

First let’s take a look at the syntax of the sprintf() function:

sprintf    ( string $format   , $arg1    ) : string

$format: a string containing placeholders.

$arg1: The corresponding variable in the string.

Code example:

<?php
$a=10;
$b="php.cn";
echo sprintf("变量a二进制为:%b;",$a);
echo "<br>";
echo sprintf("变量a八进制为:%o;",$a);
echo "<br>";
echo sprintf("变量a十进制为:%d;",$a);
echo "<br>";
echo sprintf("变量a十六进制为:%o;",$a);
echo "<br>";
echo sprintf("变量b字符串为：%s",$b);
echo "<br>";

输出：变量a二进制为:1010;
      变量a八进制为:12;
      变量a十进制为:10;
      变量a十六进制为:12;
      变量b字符串为：php.cn

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