Create ThinkPHP labels and ThinkPHP labels

Create ThinkPHP labels and ThinkPHP labels
The default tag parser of thinkphp is in Lib/Template/TagLib/TagLibCx. the class defines the tags of commonly used thinkphp such as volist php. Here I add a <category> tag parsing label format in this class: <category parentid = '0'> <{$ cat. catname }></category> label function: cyclically outputs the topic where the parent class id is parentid. in tagLibCx. add 'category '= array ('attr' => 'parentid', level => 3) to the private attribute of the class. attr: The nested level of the attribute level tag of the tag. 2. the parsing principle of adding the parsing function tag is to get the corresponding information by reading the xml file, then combine the required php source code, and finally output the specific code on the page through echo:

 
Public function _ category ($ attr, $ content)
{
// Resolve all attributes of the tag to the $ tag Array
$ Tag = $ this-> parseXmlAttr ($ attr, 'category ');
 
// Obtain the attributes in the tag
$ Parentid = $ tag ['parentid'];
 
// Define the page-Resolved Variables
$ Result =! Empty ($ tag ['result'])? $ Tag ['result']: 'cat'; // defines the data query result to store variables.
$ Key =! Empty ($ tag ['key'])? $ Tag ['key']: 'I ';
$ Mod = isset ($ tag ['mod'])? $ Tag ['mod']: '2 ';
 
// Pieces the database query statement. Here, the CategoryModel encapsulated function is used directly.
$ SQL = "D ('category ')-> ";
$ SQL. = "getCategorys (". $ parentid .')';
 
// Concatenate output characters
$ Parsestr = '<? Php $ _ result = '. $ SQL.'; if ($ _ result): $ '. $ key.' = 0 ;';
$ Parsestr. = 'foreach ($ _ result as $ key => $ '. $ result .'):';
$ Parsestr. = '+ + $'. $ key. '; $ mod = ($'. $ key. '%'. $ mod. ');?> ';
$ Parsestr. = $ content; // parse the content in the category label
$ Parsestr. = '<? Php endforeach; endif;?> ';
Return $ parsestr;
 
}
 
GetCategorys method in CategoryModel
/*
* Obtain the topic information based on parentid.
* $ Parentid parent id
* $ Whether withSelf contains itself
*/
 
Public function getCategorys ($ parentid, $ withSelf = 0)
{
$ Parentid = intval ($ parentid );
$ Categorys = $ this-> where (array ('parentid' => $ parentid, 'ismenu '=> 1)-> order ('listorder ASC ') -> select ();
// Include yourself
If ($ withSelf)
{
$ Categorys2 = $ this-> where (array ('id' => $ parentid, 'ismenu '=> 1)-> limit (1)-> select ();
$ Category = array_merge ($ categorys, $ categorys2 );
}
Return $ categorys;
 
}

3. Reference on the page <Category parentid = '0'> <{$ cat. catname}> </category> This label is ready! You can get rid of the volist and dynamically output what we want on the page.