How Do I Verify Array Equality in PHP?

Verifying Array Equality in PHP

When comparing arrays in PHP, it's crucial to ensure that they are equal in terms of size, indices, and values. This can be done using the following operators:

== or !=:

The equality operator (==) and inequality operator (!=) check if two arrays have the same key/value pairs. However, these operators do not consider the order or type of the elements within the arrays.

=== or !==:

Alternatively, the identity operator (===) and non-identity operator (!==) perform a stricter check. They require that the arrays have the same key/value pairs in the same order and of the same types.

Example:

$a = ['apple' => 1, 'banana' => 2, 'cherry' => 3];
$b = ['apple' => 1, 'banana' => 2, 'cherry' => 3];

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

Note:

The inequality operator is != while the non-identity operator is !==. This naming convention matches the equality operator == and the identity operator ===.

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