PHP NOTE 2

One, array 1. The definition of an array:

In PHP, an array is a collection of data that is stored in a set. The elements in the array are called array elements, represented by the "key = = value" form. Where "key" is the distinguished name of an element array, and "value" is the contents of an array element.

In PHP, there are usually two ways to define an array:

(1). Use an assignment to define an array, create an array variable, and assign a value directly to the variable using the assignment operator:

$arr [] = ' PHP '; $arr [1] = ' C + + '

(2). Use the array () function to define arrays: the elements of an array are used as arguments, and the elements are separated by commas ', ':

$info Array (' If ' = 1, ' name = ' Tom ');

PHP NOTE 2