数据库 php array
数据库查询代码如下:$query = mssql_query($sql_all);$array_pie=new array();while($row=mssql_fetch_array($query)){ //array_push($arry_pie, $var)//???}
要让查询结果初始化$array_pie形成结构类似下面的数组
var myData = new Array([1997, 7.80], [1998, 4.80], [1999, 6.50]);
while中的代码该怎么写?
回复讨论(解决方案)
你想要的结果其实就是一个二维数组
$query = mssql_query($sql_all);$array_pie=new array();$i = 0;while($row=mssql_fetch_array($query)){ array_pie[$i][] = $row; $i++;}
var myData = new Array([1997, 7.80], [1998, 4.80], [1999, 6.50]);中数据分别对应
$row[1]、$row[2]
你想要的结果其实就是一个二维数组
$query = mssql_query($sql_all);$array_pie=new array();$i = 0;while($row=mssql_fetch_array($query)){ array_pie[$i][] = $row; $i++;}
1
var myData = new Array([1997, 7.80], [1998, 4.80], [1999, 6.50]);
中数据分别对应
$row[1]、$row[2]
var myData = new Array([1997, 7.80], [1998, 4.80], [1999, 6.50]);中数据分别对应
$row[1]、$row[2]
$query = mssql_query($sql_all);$array_pie=new array();$i = 0;while($row=mssql_fetch_array($query)){ array_pie[$i][0] = $row[1]; array_pie[$i][1] = $row[2]; $i++;}
这样试试
$query = mssql_query($sql_all);$array_pie = array();while($row=mssql_fetch_array($query)){ $array_pie[] = array($row[1]、$row[2]);}
var myData = <?php echo json($array_pie);?>;
var myData = new Array([1997, 7.80], [1998, 4.80], [1999, 6.50]);中数据分别对应
$row[1]、$row[2]
$query = mssql_query($sql_all);$array_pie=new array();$i = 0;while($row=mssql_fetch_array($query)){ array_pie[$i][0] = $row[1]; array_pie[$i][1] = $row[2]; $i++;}
这样试试
怎么完整输出这个$array_pie以查看数据是否正确
在while循环外面 print_r($array_pie);
$query = mssql_query($sql_all);$array_pie = array();while($row=mssql_fetch_array($query)){ $array_pie[] = array($row[1]、$row[2]);}
var myData = <?php echo json($array_pie);?>;
$query1 = mssql_query($sql_all);$arry_pie = array();while($row1=mssql_fetch_array($query1)){ //echo $row;//array array if($row1[2]!=0){ $row1['percent_d']=round($row1[2]/$s_ds*100,2).'%'; }else{ $row1['percent_d']=0; } if($row1[4]!=0){ $row1['percent_m']=round($row1[4]/$s_ms*100,2).'%'; }else{ $row1['percent_m']=0; } //$array_pie[$i][0]=$row[0]; //$arry_pie[$i][1]=$row[2]; $arry_pie=array($row1[0],$row1[1]); //$i++; array_push($items, $row1);} echo json($arry_pie);
baoc
Fatal error: Call to undefined function json() in C:\PHP\APMServ5.2.6\www\htdocs\xjjxV2\get_brands.php on line 47
手误
json 应为 json_encode
手误
json 应为 json_encode
为什么输出只有一条数据...
$arry_pie = array();$query = mssql_query($sql_all);while($row=mssql_fetch_array($query)){ $s_dq=$s_dq+$row[1]; $s_ds=$s_ds+$row[2]; $s_mq=$s_mq+$row[3]; $s_ms=$s_ms+$row[4]; $arry_pie=array($row[0],$row[1]); }echo json_encode($arry_pie)."<br>";
$arry_pie = array($row[0],$row[1]);
改为
$arry_pie[] = array($row[0],$row[1]);

To protect the application from session-related XSS attacks, the following measures are required: 1. Set the HttpOnly and Secure flags to protect the session cookies. 2. Export codes for all user inputs. 3. Implement content security policy (CSP) to limit script sources. Through these policies, session-related XSS attacks can be effectively protected and user data can be ensured.

Methods to optimize PHP session performance include: 1. Delay session start, 2. Use database to store sessions, 3. Compress session data, 4. Manage session life cycle, and 5. Implement session sharing. These strategies can significantly improve the efficiency of applications in high concurrency environments.

Thesession.gc_maxlifetimesettinginPHPdeterminesthelifespanofsessiondata,setinseconds.1)It'sconfiguredinphp.iniorviaini_set().2)Abalanceisneededtoavoidperformanceissuesandunexpectedlogouts.3)PHP'sgarbagecollectionisprobabilistic,influencedbygc_probabi

In PHP, you can use the session_name() function to configure the session name. The specific steps are as follows: 1. Use the session_name() function to set the session name, such as session_name("my_session"). 2. After setting the session name, call session_start() to start the session. Configuring session names can avoid session data conflicts between multiple applications and enhance security, but pay attention to the uniqueness, security, length and setting timing of session names.

The session ID should be regenerated regularly at login, before sensitive operations, and every 30 minutes. 1. Regenerate the session ID when logging in to prevent session fixed attacks. 2. Regenerate before sensitive operations to improve safety. 3. Regular regeneration reduces long-term utilization risks, but the user experience needs to be weighed.

Setting session cookie parameters in PHP can be achieved through the session_set_cookie_params() function. 1) Use this function to set parameters, such as expiration time, path, domain name, security flag, etc.; 2) Call session_start() to make the parameters take effect; 3) Dynamically adjust parameters according to needs, such as user login status; 4) Pay attention to setting secure and httponly flags to improve security.

The main purpose of using sessions in PHP is to maintain the status of the user between different pages. 1) The session is started through the session_start() function, creating a unique session ID and storing it in the user cookie. 2) Session data is saved on the server, allowing data to be passed between different requests, such as login status and shopping cart content.

How to share a session between subdomains? Implemented by setting session cookies for common domain names. 1. Set the domain of the session cookie to .example.com on the server side. 2. Choose the appropriate session storage method, such as memory, database or distributed cache. 3. Pass the session ID through cookies, and the server retrieves and updates the session data based on the ID.


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

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

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

VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft

SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

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

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.