<?php
// defining a simple array
$array1 = array(4,8,15,16,23,42);
// referencing an array value by its index
echo $array1[0];
// arrays can contain a mix of strings, numbers, even other arrays
$array2 = array(6,"fox", "dog", array("x", "y", "z"));
// referencing an array value that is inside another array
echo $array2[3][1];
?>
<br />
<?php
// Changing values in an array that has already been defined
// It's just like variables but you use the index to reference the array position
$array2[3] = "cat";
echo $array2[3];
?>
<br />
<?php
// You can also assign labels to each pocket (called "keys"),
$array3 = array("first_name" => "Kevin", "last_name" => "Skoglund");
// which will allow you to use the key to reference the value in that array position.
echo $array3["first_name"] . " " . $array3["last_name"] . "<br />";
$array3["first_name"] = "Larry";
echo $array3["first_name"] . " " . $array3["last_name"] . "<br />";
?>
<br />
A good way to see the values inside an array during development:<br />
<pre><?php print_r($array2); ?></pre>
//Array Functions
Count: <?php echo count($array1); ?><br />
Max value: <?php echo max($array1); ?><br />
Min value: <?php echo min($array1); ?><br />
<br />
Sort: <?php sort($array1); print_r($array1); ?><br />
Reverse Sort: <?php rsort($array1); print_r($array1); ?><br />
<br />
<?php
// Implode converts an array into a string using a "join string"
// Explode converts a string into an array using a "divide string"
?>
Implode: <?php echo $string1 = implode("---", $array1); ?><br />
Explode: <?php print_r(explode("---", $string1)); ?><br />
<br />
In array: <?php echo in_array(15, $array1); // returns T/F ?><br />
