get length of array

For Web programming, the most important thing is to access and read and write data. There may be many ways to store them, such as strings, arrays, files, and so on. arrays, which can be said to be a more important way of using PHP data. PHP's Array

Remember vamcily once asked me: "Why get the length of an array with. Length (in the form of a member variable), and get the length of a string with. Length (in the form of a member method). ” At that time, I thought it was reasonable to ask. To do

PHP array length of the method, PHP provides us with two functions to calculate the length of a one-dimensional array, I believe that the function of getting the length of the array is not very clear, today we will take you to learn more about the

basic functions of array manipulationThe key name and value of the arrayArray_values ($arr); Gets the value of the array Array_keys ($arr), gets the key name of the array array_flip ($arr), and the values in the array are exchanged with the key

PHP has a lot of functions about arrays to facilitate array manipulation. Defined: Each entity of an array contains two items: key and value, which can be retrieved by a query key. These keys can be numeric (numerical) or associated (associative)

Basic functions of array manipulationThe key name and value of the arrayArray_values ($arr); Get the value of an arrayArray_keys ($arr); Gets the key name of the arrayArray_flip ($arr); the values in the array are exchanged with the key names (if

Php array declaration, traversal, array global variables. Php Tutorial array declaration, traversal, array global variable [php]? ** 1. Array Overview * 1. the essence of arrays: managing and operating a group of variables, batch processing * 2.

Learn PHP's array summary "experience", PHP array Summary PHP has a lot of functions for arrays, which makes it easy to manipulate arrays. Defined: The array contains two items per entity: Key and value, which can be obtained by querying the key.

In C, we often need to know the length of an array, but because of the nature of the language itself, so there is no particularly simple and straightforward way to achieve the effect, so write some methods here for your reference. Note: The array in

Getting the length of the array in Java is simple: the array name. Length, let's see a simple program on it, as follows:This is the last time that the program, I just changed for the back of the 4 into a a.length, perhaps someone asked, then why do