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What are numeric arrays in PHP?
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.
How to declare and initialize an array?
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];
?> Accessing the elements
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";
?> Length of an array
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);
?> View all Courses
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