Thinkphp template Tag if and eq differences and comparison instance analysis, thinkphpeq
This article describes the differences and comparison between the Thinkphp template Tag if and eq. Share it with you for your reference. The specific analysis is as follows:
In the TP template language. Both if and eq can be used for variable comparison. Summarize the following points:
1. Comparison of two variables:
<If condition = "$ item. group_id eq $ one. group_id"> <eq name = "item. group_id" value = "$ one. group_id">
IF the former fails to be judged, and <neq> (or <eq>) of the latter is OK. Note: $ variable is not required for name, and $ variable is required for value.
2. When the value is NULL:
<If condition = "name neq 'null'"> just a test </if> <neq name = "name" velue = ""> just a test </neq>
IF the former fails to be judged, the latter's <neq> (or <eq>) can be used to identify null ""
3. When the multi-dimensional array has a subscript of 0:
<If condition = "name.0 neq 'test'"> just a test </if> <eq name = "name.0" velue = "test"> just a test </eq>
The former cannot be compiled by using IF, and the latter eq can be used.
I hope this article will help you with ThinkPHP-based php programming.