The ThinkPHP template tag eq if distinguishes 0, null, false, thinkphpeq

The ThinkPHP template tag eq if distinguishes 0, null, false, thinkphpeq

During project creation, we found that in the template tag eq of ThinkPHP, the values 0, null, and false are the same. That is to say, if the variables are the three values, they cannot be distinguished, I was very depressed, but I couldn't find the official manual. I thought I should not. I went over it again and found that there was a heq and nheq tag, the official manual just mentioned it and did not elaborate on it. Therefore, many people may ignore it. This label is used to determine the constant equals, which is equal to "=". Now, it's okay, solve the problem. The usage is the same as that of the eq tag,

As follows:

<! -- Heq tag -->

<Heq name = "var" value = "0">... <Heq name = "var" value = "">... <Heq name = "var" value = "false">...

<! -- If label -->

<If condition = "$ var heq 0">... </if>
<If condition = "$ var heq'' ">... </if>
<If condition = "$ var heq false">... </if>

In the above ThinkPHP template tag eq if, the method for distinguishing 0, null, and false is all the content that I have shared with you. I hope to give you a reference, and I hope you can provide more support for the customer's house.