This article introduces you to the volist tag in thinkphp through practical cases. This article introduces you to it in very detail and has reference value. Friends who need it can refer to it. I hope it can help you.
Attributes:
name (required): data template variable to be output
id (required): loop variable
offset (optional): the offset of the data to be output
length (optional): the length of the output data
key (optional): the key variable of the loop, the default value is i
mod (optional): modulo the key value, the default is 2
empty (optional): the string displayed if the data is empty
select method of the usual model The returned result is a two-dimensional array, which can be output directly using the volist tag.
$User = M('User'); $list = $User->select(); $this->assign('list',$list); <volist name="list" id="vo"> {$vo.id} {$vo.name} </volist>
Output even records
<volist name="list" id="vo" mod="2" > <eq name="mod" value="1">{$vo.name}</eq> </volist>
The mod starts counting from 0, here the mod loop count is 0,1
Mod attribute is also used to control the line wrapping of certain records, for example:
<volist name="list" id="vo" mod="5" > {$vo.name} <eq name="mod" value="4"><br/></eq> </volist>
mod loop count, 0,1,2,3,4 when the value is Line break at 4. That is, 5 pieces of data are changed to one row.
Output loop variable
<volist name="list" id="vo" key="k" > {$k}.{$vo.name} </volist>
The loop variable starts from 1 1, 2, 3, 4
if If the key attribute is not specified, the loop variable i is used by default, for example:
<volist name="list" id="vo" > {$i}.{$vo.name} </volist>
Comprehensive case:
<volist name="agentData" id="vo" mod="3" key="k" empty="暂时没有数据"> <p style="display:inline-block;width:280px;margin:3px;"> <input type="radio" class="regular-radio" value="{sh:$vo.agent_id}" name="agent_id" id="agent_{sh:$k}" <eq name="k" value="1">checked="checked"</eq>><label for="agent_{sh:$k}"></label><span style="display:inline-block;padding:0px 0px 5px 5px;">{sh:$vo.name} 电话({sh:$vo.tel})</span> </p> {sh:$mod} <eq name="mod" value="2"><br/></eq> </volist>
Effect
Related recommendations:
Detailed explanation of the operation of the volist tag in ajax in thinkphp
The difference between foreach and volist in ThinkPHP
Introduction to the usage of volist tag in Thinkphp_PHP tutorial
The above is the detailed content of Detailed explanation of volist tag in thinkphp. For more information, please follow other related articles on the PHP Chinese website!

PHPsessionscanstorestrings,numbers,arrays,andobjects.1.Strings:textdatalikeusernames.2.Numbers:integersorfloatsforcounters.3.Arrays:listslikeshoppingcarts.4.Objects:complexstructuresthatareserialized.

TostartaPHPsession,usesession_start()atthescript'sbeginning.1)Placeitbeforeanyoutputtosetthesessioncookie.2)Usesessionsforuserdatalikeloginstatusorshoppingcarts.3)RegeneratesessionIDstopreventfixationattacks.4)Considerusingadatabaseforsessionstoragei

Session regeneration refers to generating a new session ID and invalidating the old ID when the user performs sensitive operations in case of session fixed attacks. The implementation steps include: 1. Detect sensitive operations, 2. Generate new session ID, 3. Destroy old session ID, 4. Update user-side session information.

PHP sessions have a significant impact on application performance. Optimization methods include: 1. Use a database to store session data to improve response speed; 2. Reduce the use of session data and only store necessary information; 3. Use a non-blocking session processor to improve concurrency capabilities; 4. Adjust the session expiration time to balance user experience and server burden; 5. Use persistent sessions to reduce the number of data read and write times.

PHPsessionsareserver-side,whilecookiesareclient-side.1)Sessionsstoredataontheserver,aremoresecure,andhandlelargerdata.2)Cookiesstoredataontheclient,arelesssecure,andlimitedinsize.Usesessionsforsensitivedataandcookiesfornon-sensitive,client-sidedata.

PHPidentifiesauser'ssessionusingsessioncookiesandsessionIDs.1)Whensession_start()iscalled,PHPgeneratesauniquesessionIDstoredinacookienamedPHPSESSIDontheuser'sbrowser.2)ThisIDallowsPHPtoretrievesessiondatafromtheserver.

The security of PHP sessions can be achieved through the following measures: 1. Use session_regenerate_id() to regenerate the session ID when the user logs in or is an important operation. 2. Encrypt the transmission session ID through the HTTPS protocol. 3. Use session_save_path() to specify the secure directory to store session data and set permissions correctly.

PHPsessionfilesarestoredinthedirectoryspecifiedbysession.save_path,typically/tmponUnix-likesystemsorC:\Windows\TemponWindows.Tocustomizethis:1)Usesession_save_path()tosetacustomdirectory,ensuringit'swritable;2)Verifythecustomdirectoryexistsandiswrita


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

SublimeText3 Linux new version
SublimeText3 Linux latest version

SublimeText3 Chinese version
Chinese version, very easy to use

Dreamweaver CS6
Visual web development tools

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function

WebStorm Mac version
Useful JavaScript development tools
