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Numeric arrays allow us to store multiple values of the same data type in a single variable without having to create separate variables for each value. These values can then be accessed using an index which in case of numeric arrays is always a number.
Note: By default the index always starts at zero.
There are two ways to create an array. Let’s take a look at both these ways in the example below:
<?php //creating an empty array $empty_array = array(); //Method 1 to create an array $my_array1 = array("apple", "banana", "mango", "peach"); //Method 2 to create an array $my_array2[0] = "joe"; $my_array2[1] = "jonas"; $my_array2[2] = "nick"; //displaying output echo $my_array1[0]."\n"; echo $my_array2[0]; ?>
In order to access the elements of an array, you need to know their index value.
Let’s take a look at an example below:
<?php //Method 1 to create an array $my_array1 = array("apple", "banana", "mango", "peach"); //accessing elements of array using their index echo $my_array1[0],"\n"; echo $my_array1[1],"\n"; echo $my_array1[2],"\n"; echo $my_array1[3],"\n"; ?>
The length of an array, i.e, the number of elements present in the array can be counted using the in-built function count
.
Let’s take a look at an example implementing count
:
<?php //Method 1 to create an array $my_array1 = array("apple", "banana", "mango", "peach"); //calculating length of the array echo "Length of the array is: ".count($my_array1); ?>