PHP 关联数组的相等性

Question

Quick question about PHP associative arrays.

Say there are two arrays:

$A = array("AAA" => "45", "FFF" => "108", "GGG" => "15"); 

and

$B = array("FFF" => "108", "GGG" => "15", "AAA" => "45");

Are these arrays equal? Does the position of an entry in associative arrays matter?

Answer 1

According to PHP official document:

http://php.net/manual/en/language.operators.array.php

Equality:

$a == $b TRUE if $a and $b have the same key/value pairs.

Identity:

$a === $b TRUE if $a and $b have the same key/value pairs in the same order and of the same types.

Demo:

$A=array ("AAA"=>"45", "FFF"=>"108", "GGG"=>"15");
$B=array ("FFF"=>"108", "GGG"=>"15", "AAA"=>"45");

var_dump($A==$B);

bool(true)

var_dump($A===$B);

bool(false)