How to distinguish associative arrays from indexed arrays

This time I will bring you the method of distinguishing associative arrays and index arrays. What are the precautions for distinguishing associative arrays and index arrays? Here are practical cases, let’s take a look.

Data

username password 
test 123456

Associative array:

 mysql_fetch_assoc()
 array([username]=>'test',[password]=>'123456')

Index array:

mysql_fetch_array()
array([0]=>'test',[1]=>'123456')

var_export()

array ( 0 => 1, 1 => 'a', 2 => 'hello', )

var_dump()

array(3) { [0]=> int(1) [1]=> string(1) "a" [2]=> string(5) "hello" }

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

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