thinkphp a,r,m,d Method Difference _php Tutorial

A,r,m,d method Difference of thinkphp

In thinkphp, there are several ways to instantiate an object, if it is a class, there is a and R methods, the difference is that the A method is only an instantiation of the object, and the R method can be instantiated at the same time the method inside the object, where you need to specify, such as the following instance code:

 
  Test1 (); echo "";//You can also go across modules call $test_m=a ("Home/goods"), Echo $test _m->test (); echo "",//r method can take execution of the corresponding module R ("Home/goods /test ");//$this->display ();}}

As can be seen from the above, the R method can also be used to cross-module to instantiate.

In addition, in model data models, it is necessary to use the following two methods, one is the D method, one is the M method, the former is the instantiation of the data model class, and the latter is the parent class of the instantiated data model.

 
  Select (); echo "

"; Var_dump ($mythinkphp->select ()); echo count ($t); echo ""; echo Count ($t [1]); echo ""; for ($i =0; $i
 
  
   
  Although there is no difference from usage, the D method instantiates only the defined data model class, and the M method instantiates the parent class of the data model.
  
   

  
   

  
   

 
  

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