php - temp变量v数组索引

Question

Aside from readability, are there any pros/cons to either of the following examples. The first i will access the value using the array index each time i use it and the second example i will assign to a temporary varaiable and then just use the variable

$myArray = ['value_1' => 'value 1', 'value_2'  => 'value 2', 'value_3'  => 'value 3'];
$value1 = $myArray['value_1'];        
// Do lots of things with $value1

Versus

$myArray = ['value_1' => 'value 1', 'value_2'  => 'value 2', 'value_3'  => 'value 3'];
// Do lots of things with $myArray['value1']

Answer 1

http://sandbox.onlinephpfunctions.com/code/c5acd07edcc910bfdd80a27bee0583d8540e17e3

Here is the result by doing it 100000 times:

First: 0.0018520355224609 with a pointer to the actual value

Second: 0.003324031829834 with a pointer to the array

Like you can see there is a big difference but now computers are to fast to even make it worth your time worrying about it.