Php associative array index code#

The code above is an example of a multidimensional array because it contains more than one array (an array of arrays) with one single variable of $staff. Remember, an array starts counting from index 0. you can access the information of any staff you wish to by using echo $(variable name). 'Email' => $Staffs // This displays the email of the last staff which is $staffs //This displays the Name of the staff in the first array (index 0) which is Derek Emmanuel

Php associative array index archive#

We can use multidimensional arrays to archive this.

Php associative array index registration#

Suppose we want to store the Names, Registration Numbers, and Emails of some of the staff working in a particular company. In general, multidimensional arrays allow you to store multiple arrays in a single variable. This means that every element in the array holds a sub-array within it. You can think of a multidimensional array as an array of arrays. The values of the array are 17, 18, 16, and 17. The keys of the array are scott_Mcall, Stalenski, Lydia, Allision, and we used them to assign the age to each student. The code above is an example of an associative array.

For example: 17,Įcho $student_age //this code will display the age of Scot_Mcall as 17Įcho $student_age //this code will display the age of stalenski as 18Įcho $student_age //this code will display the age of Lydia as 16Įcho $student_age //this code will display the age of Allision as 17 We can use the Associative array method to get it done. Suppose we want to assign ages to a group of high school students with their names. When you want to store the score of a student in different subjects.When you want to record the salaries of your employees.When you want to store the age of different students along with their names.There are situations where you shouldn't use the numeric/indexed array, such as: And value is the value assigned to the array element. Keys are descriptive captions of the array element used to access the value of the array. In an associative array, we make use of key and value. What are Associative Arrays?Īn associative array is a type of array where the key has its own value. Counting from 0 to 4, we can see that 88 falls under index 4, indicating that 88 is the number we're seeking and that will be displayed to the browser. We want to display the element with the index of 4. The code above follows the same pattern as our definition of an array, which states that it counts from zero. You can also choose to display only one element/item of an array in the web browser by doing this:

You can also chose to use the echo( ) keyword, but in my case I prefer to use var_dump( ) because it gives a more detailed explanation of the results we get. The var_dump($cars) keyword above will show us the total number of elements we have in the array, the index number of each array, and also the length of each element in the array. Here's an example of a numeric array: įrom the code above I have a variable of $cars which stores an array of 5 elements. What are Numerical or Indexed Arrays?Ī numerical array is a type of array which can store strings, numbers, and objects. Let's look at how each one works in more detail. There are different types of arrays in PHP. So whenever you want to call the first value of an array you start with 0 then the next is 1.and so on. To create an array in PHP, we use the array function array( ).īy default, an array of any variable starts with the 0 index. In this case, the array keys() function is used to identify indices with provided names, and the count() method is used to count the number of indices in associative arrays.An array is a special variable that we use to store or hold more than one value in a single variable without having to create more variables to store those values. Using the for loop first, and then the foreach loop second. The associative array can be looped through in two different ways. Loops may be used to go over associative arrays.

You may achieve this by using an associative list.

Consider the following scenario: you have a group of people and want to assign gender to each of them based on their names.

The variable’s name is “$variable name…”, the element’s access index number is “,” and the array element’s value is “value.”.

Instead, you may create an associative list with the workers’ names as keys and their salary as the value. An associative array’s index is a string that establishes a strong relationship between key and value.įor storing employee wages in an array, a numerically indexed array is not the ideal choice. Associative arrays are similar to numeric arrays in appearance, but differ in terms of index.