PHP - Manual: vprintf

2024-05-04

vsprintf »

« vfprintf

vprintf

(PHP 4 >= 4.1.0, PHP 5, PHP 7, PHP 8)

vprintf — 输出格式化字符串

说明

vprintf(string $format, array $args): int

根据 format （sprintf() 函数文档中有相关描述）参数指定的格式，在一个格式化字符串中显示多个值。

作用与 printf() 函数类似，但是接收一个数组参数，而不是一系列可变数量的参数。

参数

format: 关于 format 的描述，参见 sprintf()。
args

返回值

返回输出字符串的长度。

范例

示例 #1 vprintf(): 前导 0 的整数


<?php
vprintf("%04d-%02d-%02d", explode('-', '1988-8-1')); // 1988-08-01
?>

参见

printf() - 输出格式化字符串
sprintf() - 返回格式化字符串
vsprintf() - 返回格式化字符串

add a note

User Contributed Notes 8 notes

down

steve at stevelockwood dot net ¶

7 years ago


If, instead of an array, you pass an object PHP will automatically cast the object as an array so you can use it directly in vprintf.
<?php
 $object = new stdClass();
$object->Property1 = 'Value 1';
$object->Property2 = 'Value 2';
vprintf('%-20s %-20s', $object);

/* will output
 Value 1              Value 2             
*/
?>

down

tehjosh at gamingg dot net ¶

14 years ago


To toolofthesystem at gmail dot com:

You don't need to use output buffering with vprintf() because you can use vsprintf(), which has the same functionality as vprintf(), except that it returns the resulting string instead of outputting it.

down

phpcoder at gmail dot com ¶

2 years ago


Using the ... operator, vprintf($format, $array) is basically just printf($format, ...$array).

down

taken from "Php Phrasebook" ¶

14 years ago


<?php
$string = 'The site runs on PHP '.phpversion();
preg_match('/php ((\d)\.\d\.\d+)/i',$string,$matches);
print_r($matches);
vprintf('Match: %s<br /> Version %s; Major:%d.',$matches);
?>

output:
Array ( [0] => PHP 5.2.5 [1] => 5.2.5 [2] => 5 ) 
Match: PHP 5.2.5 Version 5.2.5; Major:5.

For preg_match:

If matches  is provided, then it is filled with the results of search. $matches[0] will contain the text that matched the full pattern, $matches[1]  will have the text that matched the first captured parenthesized subpattern, and so on.

down

toolofthesystem at gmail dot com ¶

15 years ago


This function comes useful sometimes when trying to list information returned from MySQL:

function print_sql($query,$printf){
    $sql_sql = mysql_query($query);
    while($sql = mysql_fetch_row($sql_sql)){
        vprintf($printf,$sql);
    }
}

Unfortunately, this seems to sneak its way past output buffering when I tried creating an argument to allow it to be contained in a returned string... either that or I didn't do it right.

down

caleb at tekhawk dot com ¶

15 years ago


i know that you can use %1$s or %3$s to select the first or third string but how can you or can you use array names to select it

something like %'user'$s $'email'$s

i tend to add things to my databases over time and this could save loads of recoding

down

-2

Chris ¶

9 years ago


Another way to display arrays is use an array_walk(). This can be useful inline echo/print where a foreach wouldn't work, e.g.

<?php
echo "These errors: ", (unset)array_walk($msgs, function($a) { echo "<p>$a</p>"; } ), "must be corrected.";
?>

down

-2

badcop666 at hotmail dot com ¶

14 years ago


For blocks of text, sprintf() is slow according to my tests. 

Also, having the mapping between place-holders and the list of actual variables or datastructures often makes this code difficult to read. But the printf() family are widely supported and have a huge range of nice features. Performance is a cold mistress though!

From an ease-of-reading and maintenance, debugging point of view, I much prefer HEREDOC and "...{$variable}..." methods.

For a block of HTML markup with place holders, the fastest by far was:-

?>
<div> markup etc<?= $variable ?>more markup
<?

My tests comprised 20 runs of a loop of 1 million iterations with output buffering, ditching the buffer on each loop.

The timings ranged from average 2.1msec/million repetitions for the <?= $var ?> method up to 7.6msec/million using printf().

I'll try some benchmarking tools too, since I just wrote this myself and it could be introducing bias, but they've run on dev servers with low load.

Hopefully interesting.

add a note

官方地址：https://www.php.net/manual/en/function.vprintf.php

有任何技术问题请点击这里网站运营推广招聘

IT PHP 编程语言 Linux 科技开发编程 Elasticsearch HTML/CSS/XML 网络 JAVA NoSQL C/C++ 面试数据库 Golang Git 算法正则表达式操作系统 Redis 互联网 MySql JavaScript 运维软件架构设计 Mac OS 国际 TCP/IP Excel Vim Windows Socket Oracle VR MongoDB 运营 Python MemCache 商业硬件电子设计 nginx 娱乐摄影游戏 WordPress HTTP 团建数码电器

php7 安装fileinfo扩展 preg_split — 通过一个正则表达式分隔字符串 [PHP] inet_pton/inet_ntop IP地址转换函数 php位值,解决 PHP 中 usort 在值相同时改变原始位置的问题 PHPMailer设置utf8 PHPMailer字符集CharSet 如何在Composer中为GitLab实例设置访问令牌 array_multisort() 多字段排序 laravel框架查看sql语句方式 [原创]诡异的php-fpm超时问题利用php soap实现web service PHP获取指定函数定义在哪个文件中及行号 php设置cookie为httponly防止xss攻击 PHP5 扩展SOAP 调用 webservice PHP-FPM进程数的设定 PHP7添加redis扩展 PHP - mysql_real_escape_string()与mysql_escape_string() 的区别利用PHP SOAP实现WEB SERVICE PHPstorm 里面Terminal 不能使用 esc键吗退出编辑模式吗 PHP的Socket通信之UDP篇 PHP注释规范

略微加速

PHP官方手册 - 互联网笔记

vprintf

说明

参数

返回值

范例

参见

User Contributed Notes 8 notes