php简单实现查询数据库返回json数据_PHP
示例代码一:
// 设置返回json格式数据 header('content-type:application/json;charset=utf8'); //连接数据库 $link = mysql_connect("localhost", "root", "root") or die("Unable to connect to the MySQL!"); mysql_query("SET NAMES 'UTF8'"); mysql_select_db("jilinwula", $link) or die("Unable to connect to the MySQL!"); // 获取分页参数 $page = 0 ; $pageSize = 3; if(!is_null($_GET["page"])) { $page = $_GET["page"]; } if(!is_null($_GET["pageSize"])) { $pageSize = $_GET["pageSize"]; } // 查询数据到数组中 $result = mysql_query("select username,password from userinfo limit " . $page . ", ". $pageSize .""); $results = array(); while ($row = mysql_fetch_assoc($result)) { $results[] = $row; } // 将数组转成json格式 echo json_encode($results); // 关闭连接 mysql_free_result($result); mysql_close($link);
示例代码二:
<?php //需要执行的SQL语句 //单条 $sql="select id,name from tbl_user where id=1"; //多条数据 //$sql="select id,name from tbl_user"; //调用conn.php文件进行数据库操作 require('Conn.php'); //提示操作成功信息,注意:$result存在于conn.php文件中,被调用出来 if($result) { // $array=mysql_fetch_array($result,MYSQL_ASSOC); /*数据集 $users=array(); $i=0; while($row=mysql_fetch_array($result,MYSQL_ASSOC)){ echo $row['id'].'-----------'.$row['name'].'</br>'; $users[$i]=$row; $i++; } echo json_encode(array('dataList'=>$users)); */ /*单条数据*/ $row=mysql_fetch_row($result,MYSQL_ASSOC); echo json_encode(array('jsonObj'=>$row)); } mysql_free_result($result); //释放结果 mysql_close(); //关闭连接 ?>
以上所述就是本文的全部内容了,希望大家能够喜欢。

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

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics



Alipay PHP...

JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,

The application of SOLID principle in PHP development includes: 1. Single responsibility principle (SRP): Each class is responsible for only one function. 2. Open and close principle (OCP): Changes are achieved through extension rather than modification. 3. Lisch's Substitution Principle (LSP): Subclasses can replace base classes without affecting program accuracy. 4. Interface isolation principle (ISP): Use fine-grained interfaces to avoid dependencies and unused methods. 5. Dependency inversion principle (DIP): High and low-level modules rely on abstraction and are implemented through dependency injection.

How to automatically set the permissions of unixsocket after the system restarts. Every time the system restarts, we need to execute the following command to modify the permissions of unixsocket: sudo...

Article discusses late static binding (LSB) in PHP, introduced in PHP 5.3, allowing runtime resolution of static method calls for more flexible inheritance.Main issue: LSB vs. traditional polymorphism; LSB's practical applications and potential perfo

Sending JSON data using PHP's cURL library In PHP development, it is often necessary to interact with external APIs. One of the common ways is to use cURL library to send POST�...

Article discusses essential security features in frameworks to protect against vulnerabilities, including input validation, authentication, and regular updates.

How to debug CLI mode in PHPStorm? When developing with PHPStorm, sometimes we need to debug PHP in command line interface (CLI) mode...
