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This article mainly introduces what the DEDECMS static template class file refers to, which is very detailed and has a certain reference value. Interested friends must finish reading it!

What is the DEDECMS static template class file?

Static template class file dream-weaving template engine is a template parser in the form of XML namespaces

The biggest advantage of parsing the template using the dream parser is that you can easily develop the attributes of the tag, which feels like using HTML, making the template code very intuitive and flexible. The new version of the dream parsing template engine can not only realize the parsing of the template, but also analyze the wrong tags in the template.

Include/dedetag.class.php is the main template class used by dedecms v5.3 and previous versions. It is an analytic template class, not compiled (the difference is that the former replaces the content by obtaining the tag location, while the latter is directly parsed PHP code, which is reexecuted).

First, template syntax

1. The code styles of dream weaving template engine are as follows:

{dede: tag name attribute = 'value' /}

{dede: tag name attribute = 'value'} {/ dede: tag name}

{dede: tag name attribute = 'value'} Custom style template (InnerText) {/ dede: tag name}

Tip:

If you use tags with underlying templates, you must strictly use the format {dede: tag name attribute = 'value'} {/ dede: tag name}, otherwise an error will be reported.

2. Dream weaving template engine has a number of system tags built in, which can be used directly in any situation.

(1) global tag, which means to get an external variable that can call any configuration parameter of the system except the database password, in the form of:

{dede:global name=' variable name'} {/ dede:global}

Or

{dede:global name=' variable name'/}

The variable name cannot be signed with a $symbol, such as the variable $cfg_cmspath, which should be written as {dede:global name='cfg_cmspath'/}.

(2) foreach is used to output an array in the form of:

{dede:foreach array=' array name'} [field:key/] [field:value/] {/ dede:foreach}

(3) include introduces a file in the form of:

{whether the dede:include file=' file name 'ismake=' is a dede template (yes/no)' /}

The search path for files is in the following order: absolute path, include folder, CMS installation directory, CMS main template directory

3. Dream weaving tags allow you to use functions to process the resulting values in any tag, in the form of:

{dede: tag name attribute = 'value' function='youfunction ("parameter one", "parameter two", "@ me")'/}

@ me is used to indicate the value of the current tag, and other parameters are determined by your function, for example:

{dede:field name='pubdate' function='strftime ("% Y-%m-%d% H:%M:%S", "@ me")'/}

4. Dream weaving tags allow limited programming extensions.

The format is:

The code is as follows:

{dede:tagname runphp='yes'} $aaa = @ me; @ me = "123456"; {/ dede:tagname}

@ me represents the value of the tag itself, so in-tag programming cannot use statements like echo, and can only pass all return values to @ me.

In addition, because the program code takes up the contents of the underlying template InnerText, the tags that need to be programmed can only use the default InnerText.

2. Analytical method

There are four classes in dedetag.class.php

Class DedeAttribute attribute structure representation

Class DedeAttributeParse attribute parser

Description of class DedeTag tag structure

Class DedeTagParse tag parser

When parsing a template using a parsing class, you usually go through the following steps

1. Initialize:

$dtp = new DedeTagParse ()

2. Load template / template string:

$dtp- > LoadTemplate (template file (absolute path)); / / the cache is generated, and the template does not need to be parsed the second time

Or

$dtp- > LoadSource (string)

3. Assign values to the label

Foreach ($dtp- > CTags as $tid= > $ctag) {

/ / judge the name and attribute of ctag, and assign different values, usually handled by function

If ($ctag- > GetName=='mytag') $dtp- > Assign ($tid, mytagvalue ($ctag))

}

In the above example, the tag named mytag is directly handed over to the mytagvalue function for processing, and each attribute of $ctag is judged in mytagvalue and different contents are returned.

In v5.3, in addition to field, list and other special tags, where the beginning of the arc.* class parsing files, tags are corresponding to the source code of the include/taglib, which is automatically mapped by the system.

4. Display or save as HTML

$dtp- > display ()

Or

$dtp- > SaveTo (static file name)

For secondary developers, it is not necessary to know how the dedecms template is parsed, but the structure of the CTag class should be clear enough to determine the different attributes of the tag to deal with.

The code is as follows:

Whether the class DedeTag {var $IsReplace=FALSE; / / tag has been replaced for the parser to use var $TagName= "; / / tag name var $InnerText="; / / text var $StartPos=0; / / tag start position var $EndPos=0; / / tag end position var $CAttribute="; / / tag attribute description, that is, class DedeAttribute var $TagValue= "; / / tag value var $TagID = 0 / / get the name and value of the tag function GetName () {return strtolower ($this- > TagName);} function GetValue () {return $this- > TagValue;} / / the following two member functions are only for compatibility with the old version of function GetTagName () {return strtolower ($this- > TagName);} function GetTagValue () {return $this- > TagValue;} / / get the specified attribute function IsAttribute ($str) {return $this- > CAttribute- > IsAttribute ($str) of the tag } function GetAttribute ($str) {return $this- > CAttribute- > GetAtt ($str);} function GetAtt ($str) {return $this- > CAttribute- > GetAtt ($str);} function GetInnerText () {return $this- > InnerText;}} all the contents of what DEDECMS static template class files refer to. Thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!

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