$sql="update table set nikename='{$nikename}' where userid={$userid}";
$sql=sprintf("update table set nikename='%s' where userid=%d",$nikename,$userid)
回复讨论(解决方案)
不懂啊 感觉现在php非常火啊
感觉怎么也得先引用一下
mysql_real_escape_string($nikename)
mysql_real_escape_string($userid)
第二种方法的话,%d 可以确定$userid一定是数字,而非字符串。
php正在学,看不懂
$sql=mysql_query("update ulist set name='$name' where id=$id");
我一般是这么写。不知道楼主这什么区别。
习惯是第一个直接写sql,第二种是封装的时候。
第2种写法远比第1中写法清晰,甚至可以不需要备忘
从运行效率上讲,两者相差无几
$nikename = "test';delete ...";
$sql="update table set nikename='{$nikename}' where userid={$userid}";
var_dump($sql);
两种方法差不多,习惯第一种。但是这两种,都需要对数据进行过滤,否则存在注入。
果断 PDO...
$sql="update table set nikename='{$nikename}' where userid={$userid}";
优点:直观。速度应该稍快于第二种。
缺点:SQL注入风险。
$sql=sprintf("update table set nikename='%s' where userid=%d",$nikename,$userid)
优点:直观且强制userid为数字。
缺点:SQL注入风险。
我一般都是用的第一种。
效率嘛 我猜第一个快些
第二种我没有看过。我算是孤陋寡闻啊。
其实我一直第二种(没作几年php项目),本月到一家公司非说第一种好,想不出来有撒好的问一问写php时间长的兄弟姐妹们
刚开始入门中
熟悉 C 的程序员肯定是习惯 第二种 的
表示一直第一种写法、、、、、
个人觉得第一种比第二种效率要快,
即使只是那么一点点,
毕竟第二种需要经过函数来格式化字符串,
就拿echo和print来说吧,
书籍上有提到过前者要比后者的效率高,
后者会返回值而前者不会,
当然php文档并没有提到过这个,
更何况你现在用的是sprintf,
可能你的公司也是这样觉得的吧,
而且使用MySQLi STMT会不会比sprintf更好呢?
MySQLi STMT貌似更安全,阅读起来也很清晰。
纯属个人意见,我也是新手,哈哈。。。

Long URLs, often cluttered with keywords and tracking parameters, can deter visitors. A URL shortening script offers a solution, creating concise links ideal for social media and other platforms. These scripts are valuable for individual websites a

Following its high-profile acquisition by Facebook in 2012, Instagram adopted two sets of APIs for third-party use. These are the Instagram Graph API and the Instagram Basic Display API.As a developer building an app that requires information from a

Laravel simplifies handling temporary session data using its intuitive flash methods. This is perfect for displaying brief messages, alerts, or notifications within your application. Data persists only for the subsequent request by default: $request-

This is the second and final part of the series on building a React application with a Laravel back-end. In the first part of the series, we created a RESTful API using Laravel for a basic product-listing application. In this tutorial, we will be dev

Laravel provides concise HTTP response simulation syntax, simplifying HTTP interaction testing. This approach significantly reduces code redundancy while making your test simulation more intuitive. The basic implementation provides a variety of response type shortcuts: use Illuminate\Support\Facades\Http; Http::fake([ 'google.com' => 'Hello World', 'github.com' => ['foo' => 'bar'], 'forge.laravel.com' =>

The PHP Client URL (cURL) extension is a powerful tool for developers, enabling seamless interaction with remote servers and REST APIs. By leveraging libcurl, a well-respected multi-protocol file transfer library, PHP cURL facilitates efficient execution of various network protocols, including HTTP, HTTPS, and FTP. This extension offers granular control over HTTP requests, supports multiple concurrent operations, and provides built-in security features.

Do you want to provide real-time, instant solutions to your customers' most pressing problems? Live chat lets you have real-time conversations with customers and resolve their problems instantly. It allows you to provide faster service to your custom

The 2025 PHP Landscape Survey investigates current PHP development trends. It explores framework usage, deployment methods, and challenges, aiming to provide insights for developers and businesses. The survey anticipates growth in modern PHP versio


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Dreamweaver Mac version
Visual web development tools

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

Zend Studio 13.0.1
Powerful PHP integrated development environment

SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.

SublimeText3 English version
Recommended: Win version, supports code prompts!
