The relationship between php false and 0

false == 0, false !== 0,

Question:

The PHP documentation states that socket_create() fails to create and returns false

But why is this sentence correct

<code>if (($resource = socket_create(....)) < 0 ){
    throw new Exception("xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx");
}</code>

Creation error, $resource should be false, and an exception was thrown. The problem is that false<0 is established. Why?

I am a novice, so I want to ask if I don’t understand.

Reply content:

false == 0, false !== 0,

Question:

The PHP documentation states that socket_create() fails to create and returns false

But why is this sentence correct

<code>if (($resource = socket_create(....)) < 0 ){
    throw new Exception("xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx");
}</code>

Creation error, $resource should be false, and an exception was thrown. The problem is that false<0 is established. Why?

I am a novice, so I want to ask if I don’t understand.

0 and false are not congruent. It is obvious that 0 is of int type and false is of Boolean type.
0 == false //This condition is true and the values ​​are equal.
0 === false //This is not true. The types are equal to This is true only if the values ​​are equal

There should be something wrong with this way of writing: I just tested one

<code>if (($resource = socket_create('1', SOCK_STREAM, SOL_TCP)) < 0) {
    throw new Exception("xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx");
}
</code>

I found it was not included in the if statement