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PHP ASSOCIATIVE ARRAY FORMS CODE

My test system is a Lenovo X1 Carbon 2017 Edition, i5-7300U CPU 2.60GHz, 16 GB of RAM, running Kubuntu 18.04. So like any good scientist I decided to test it: What I found will shock you! Benchmark environment (Fight me!) But really, who bothers with defining a class for something that simple?īut that got me wondering, is that common pattern really, you know, good? Are objects actually more expensive or harder to work with than arrays? Or, more to the point, is that true today on PHP 7 given all the optimizations that have happened over the years compared with the bad old days of PHP 4? Maybe you document it in a docblock, or maybe you're a lazy jerk and you don't.

This is a pretty common pattern in PHP: You have some simple one-off internal data structure so you make an informal struct using PHP associative arrays.

PHP ASSOCIATIVE ARRAY FORMS CODE

Hence storing two different information in one array element.The other day I was working on some sample code to test out an idea that involved an object with an internal nested array.

We can save more data, as we can have a string as key to the array element, where we can have associated data to the value to be stored, like in our example, we stored the type of the car as key along with the name of the car as value.

We can provide more meaningful key or index values to our array elements.

Here are a few advantages of using associative array in our program/script: " car \n" ĭon't get confused by the syntax as $key=>$value, it means in every iteration of the foreach we are representing the array as key-value pair. Using foreach to traverse an associative array is a better approach if you have to traverse the whole array, as we do not have to bother about calculating the size of the array to loop around the array.īelow we have used the foreach to traverse the $lamborghinis array. While using the for loop to traverse an associative array we must know the size/length of the array, which can be found using the count() function.Īlso, as the index in associative array is not numeric and not sequentially, hence to find the index values or keys(as data saved in associative array is in the form of key-value), we can use the function array_keys() to get an array of the keys used in the associative array.įollowing is the syntax for traversing an array using the for loop.

To know the syntax and basic usage of for and foreach loop, you can refer to the PHP for and foreach loop tutorial. We can traverse an associative array either using a for loop or foreach. Traversing an array means to iterate it starting from the first index till the last element of the array. Hence, to access an associative array, we have to use the array name along with the index of the element in square brackets, the only difference here is that the index will be a string not a numeric value like in indexed array. No matter how we initialize the array, we can access the array as follows,

Syntax for the 1st way to create associative array: "Urus", "sports"=>"Huracan", "coupe"=>"Aventador") Īnd the syntax for the 2nd way to create associative array is: Just like indexed array, there are two different ways of creating an associative array in PHP, they are, An associative array is similar to an indexed array, but rather than storing data sequentially with numeric index, every value can be assigned with a user-designed key of string type.