Detailed explanation of the use of PHP Boolean value auto-increment and auto-decrement

This time I will bring you a detailed explanation of the use of PHP Boolean values ​​for self-increment and self-decrement. What are the precautions for using PHP Boolean values ​​for self-increment and self-decrement? The following is a practical case, let’s take a look. .

He discovered that PHP’s Boolean value is incremented. No matter how many times it is incremented, the final output is 1

This is more interesting~

Self-increment and self-decrement, everyone knows the difference between $a and $a

a means to take the address of a, increase the value of a in the memory, and then put the value in the register

a means taking the address of a, loading the value of a into the register, and then increasing the value of a in the memory

I opened an

editor to confirm the result

The final input result of the operation is as follows

It is found that the result is not quite right as expected before. PHP does not do any processing for the auto-increment operation of Boolean values, and after the auto-increment is 1 is because we used echo to output, resulting in bool being forced to

to query the official documentation of PHP. Unexpectedly, there was an obvious line of prompts

Note:

increment/decrement Operator does not affect boolean values. Decrementing a NULL value has no effect, but increasing NULL results in 1.

# I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

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