PHP Basics: Storing Creating and storing Arrays

Arrays are very powerful. You can use them to store a set of data, compare them and update them incrementally. Here is a short example how adding is one

//this file is about arrays
 
//empty array
$ar = array();
 
//add value "4" to first possible index
$ar[] = 4;
foreach ($ar as $b); {
 echo $b." 
";
 } 
 
//add value "5" to second index
$ar[2] = 5;
foreach ($ar as $b); {
 echo $b;
 }