Working with Array Elements

How to add an element to the end of an array

      
        $letters = array('a', 'b', 'c', 'd'); // array is a, b, c, d 

        $letters[] = 'e';

How to set a value at a specific index

      
      $letters = array('a', 'b', 'c', 'd'); // array is a, b, c, d 

      $letters[0] = 'e'; // array is e, b, c, d

      $letters[3] = 'f'; // array is e, b, c, f

      $letters[5] = 'g'; // array is e, b, c, f, NULL, g

How to get values from an array

      
      $letters = array('a', 'b', 'c', 'd'); // array is a, b, c, d

      $letter1 = $letters[0]; // $letter1 is 'a'

      $letter2 = $letters[1]; // $letter2 is 'b'

      $letter4 = $letters[4]; // $letter4 is NULL

How to delete values from an array

      
      $letters = array('a', 'b', 'c', 'd'); // array is a, b, c, d

      unset($letters[2]); // array is a, b, NULL, d

      unset($letters); // $letters is NULL

How to remove elements that contain NULL values and reindex an array

      
      $letters = array('a', 'b', 'c', 'd'); // array is a, b, c, d

      unset($letters[2]); // array is a, b, NULL, d

      $letters = array_values($letters); // array is a, b, d

How to use array elements with variable substitution

      
      $name = array ('Ray', 'Harris');

      echo("First Name: $name[0]") // First Name: Ray;

      echo("First Name: {$name[0]}"); // First Name: Ray

You can set and get elements from an array by coding the index for the element between brackets.
When you add or delete elements from an array, you may leave gaps in the array that contain NULL values.
You can access array elements using variable substitution in a double-quoted string. If necessary, you can place braces around the array name and index to separate the array element from the rest of the text in the string.

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