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Some Array-Related Functions

Approximately 60 array-related functions are built into PHP, which you can read about in detail at http://www.php.net/array. Some of the more common (and useful) functions are explained in this section.

• count() and sizeof()— Each counts the number of elements in an array. Given the following array:

  $colors = array("blue", "black", "red", "green");
  

  both count($colors); and sizeof($colors); return a value of 4.

• each() and list()— These usually appear together, in the context of stepping through an array and returning its keys and values. The following example steps through an associative array called $character, printing its key, the text has a value of, and the value, followed by an HTML break.

   while (list($key, $val) ...