Thinkphp template Tag if and eq differences and comparison instance analysis _ php instance

This article mainly introduces the differences and comparison between the Thinkphp template Tag if and eq, and analyzes the differences between the Thinkphp template Tag if and eq for variable comparison, for more information about the Thinkphp template Tag if and eq, see the following example. 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:

The IF statement of the former fails to be judged, and the latter's (Or . Note: $ variable is not required for name, and $ variable is required for value.

2. When the value is NULL:

 
  just a test
 
 
  just a test
 

The IF statement of the former fails to be judged, and the latter's (Or Can recognize null ""

3. When the multi-dimensional array has a subscript of 0:

 
  just a test
 
 
  just a test
 

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.