比较阵列给出不同的结果

Question

I have the following PHP code:

$a = "5";
$b = array("position"=>1);
var_dump("5" <= $b);
var_dump("5" <= "Array");
var_dump("Z" <= $b);
var_dump("Z" <= "Array");

the result is:

boolean true
boolean true
boolean true
boolean false

We know that array is converted to the string array. What's actually happening during the conversion? Why are the results different in the cases below?

var_dump("Z" <= $b); // (in this case array convert to string "array")
var_dump("Z" <= "Array");  // (in this case string "Array" )

But the result is different. Why?

Answer 1

As the manual states:

Comparison with Various Types

array | anything | array is always greater

When both operands are strings, string comparison rules are applied.

So no matter what the first operand is, < array() is always true