PHP 7 Data Structures and Algorithms

Numeric array

A numeric array does not mean it only holds numeric data. In fact, it means the indexes will be numbers only. In PHP they can either be sequential or non-sequential but they have to be numeric. In numeric arrays, values are stored and accessed in a linear way. Here are some examples of PHP numeric array:

$array = [10,20,30,40,50]; $array[] = 70;  $array[] = 80; $arraySize = count($array); for($i = 0;$i<$arraySize;$i++) {     echo "Position ".$i." holds the value ".$array[$i]."\n"; } 

This will have the following output:

Position 0 holds the value 10 Position 1 holds the value 20 Position 2 holds the value 30 Position 3 holds the value 40 Position 4 holds the value 50 Position 5 holds the value 70 Position 6 holds the value 80