Process 3 arrays together php how to#
Process 3 arrays together php code#

Languages.) The programming approach may vary a little depending on whether youДЄre using standard numerically indexed arrays or more interesting index (This approach may beДЇamiliar to you if you have used associative arrays or maps in other programming You like to make the indexing more meaningful and useful. You can useДЄrrays in the traditional numerically indexed way or set the keys to be whatever PHP allows you to use numbers or strings as the array indices. Numerical indices that typically start from zero or one. Arrays in most programming languages have EachДЄrray element has an associated index (also called a key) that is The values stored in an array are called the array elements. Pass the entire array to PHP's sort() function. You might want to sort the products alphabetically. Of code, all the values in the array can be passed to a function. Information can be moved around as a single unit. Using the looping constructs from Chapter 1, you can save workД«y performing the same actions on each value in the array.

Process 3 arrays together php how to#

(We describe how to create a variable like this shortly.)ДЈ.1 Bob's products can be stored in an array.ДЄfter you have the information as an array, you can do a number of useful These three products are stored in a single variable called $products. InДЇigure 3.1, you can see a list of three products stored in an array format. Similarly, an array is a named place to store a set of values, therebyД«ob's product list is the array for the example used in this chapter.

You learned about scalar variables in Chapter 1, 'PHP CrashД¬ourse.' A scalar variable is a named location in which to store a value

Key topics covered in this chapter include

Process 3 arrays together php code#

Likewise, you write shorter, tidier code to do some of the things you did with files in the preceding chapter. In this chapter, you continue developing the Bob's Auto Parts example using arrays to work more easily with repetitive information such as customer orders. Rather than each element having a numeric index, it can have words or other meaningful information. Associative arrays allow you to use more useful values as the index. You are probably familiar with numerically indexed arrays if you've used any programming language, but unless you use PHP or Perl, you might not have seen associative arrays before. PHP supports both numerically indexed and associative arrays. An array containing other arrays is known as a multidimensional array. One array can have many elements, and each element can hold a single value, such as text or numbers, or another array. An array is a variable that stores a set or sequence of values. The variables used in the previous chapters were scalar variables, which store a single value. This chapter shows you how to use an important programming construct: arrays. PHP and MySQL Web Development, 3rd Edition