
<?php
echo "Example 1 - Set up array of seasons and print out values" . PHP_EOL;
$seasons = array("Autumn", "Winter", "Spring", "Summer");
print $seasons[0] . " ";
print $seasons[1] . " ";
print $seasons[2] . " ";
print $seasons[3];
echo PHP_EOL . "End of Example 1" . PHP_EOL . PHP_EOL;


echo "Example 2 - Set up array of seasons and choose your own keys" . PHP_EOL;
$seasons = array(1 => "Autumn", 2 => "Winter", 3 => "Spring", 4 => "Summer");
print $seasons[1] . " ";
print $seasons[2] . " ";
print $seasons[3] . " ";
print $seasons[4];
echo PHP_EOL . "End of Example 2" . PHP_EOL . PHP_EOL;


echo "Example 3 - Set up an array with mixed values" . PHP_EOL;
$seasons = array(1 => 10, 2 => "Spring", 3 => 30, 4 => "Summer");
print $seasons[1] . " ";
print $seasons[2] . " ";
print $seasons[3] . " ";
print $seasons[4];
echo PHP_EOL . "End of Example 3" . PHP_EOL . PHP_EOL;


echo "Example 4 - Assign array values with PHP chossing next index" . PHP_EOL;
$seasons = array();
$seasons[]="Autumn";
$seasons[]="Winter";
$seasons[]="Spring";
$seasons[]="Summer";
print $seasons[0] . " ";
print $seasons[1] . " ";
print $seasons[2] . " ";
print $seasons[3];
echo PHP_EOL . "End of Example 4" . PHP_EOL . PHP_EOL;


echo "Example 5 - Creating an array of values with a loop" . PHP_EOL;
$start = 1;
$times = 2;
$answer = array();
for ($start; $start < 11; $start++) {
	$answer[$start] = $start * $times;
}
print $answer[1] . " ";
print $answer[4] . " ";
print $answer[8] . " ";
print $answer[10];
echo PHP_EOL . "End of Example 5" . PHP_EOL . PHP_EOL;


echo "====================" . PHP_EOL;
echo "Press Enter to continue ... ";
$discard = fgets(STDIN);


echo "Example 6 - Displaying array values with a loop" . PHP_EOL;
$seasons = array("Autumn", "Winter", "Spring", "Summer");
for ($key_Number = 0; $key_Number < 4; $key_Number++) {
	echo $seasons[$key_Number] . PHP_EOL;
}
echo "End of Example 6" . PHP_EOL . PHP_EOL;


echo "Example 7 - Using text as keys to create an associative array" . PHP_EOL;
$full_name = array();
$full_name["David"] = "Gilmour";
$full_name["Nick"] = "Mason";
$full_name["Roger"] = "Waters";
$full_name["Richard"] = "Wright";
print $full_name["Nick"] . "\n";
print $full_name["David"];
echo PHP_EOL . "End of Example 7" . PHP_EOL . PHP_EOL;


echo "Example 8 - Loop to display associative array key/value pairs" . PHP_EOL;
$full_name = array();
$full_name["David"] = "Gilmour";
$full_name["Nick"] = "Mason";
$full_name["Roger"] = "Waters";
$full_name["Richard"] = "Wright";
foreach ($full_name as $first_name => $surname) {
	print "Key = " . $first_name . " Value = " . $surname . "\n";
}
echo "End of Example 8" . PHP_EOL . PHP_EOL;


echo "Example 9 - Sorting Arrays (Associative)" . PHP_EOL;
$full_name = array();
$full_name["Roger"] = "Waters";
$full_name["Richard"] = "Wright";
$full_name["Nick"] = "Mason";
$full_name["David"] = "Gilmour";
foreach ($full_name as $first_name => $surname) {
	print "Key = " . $first_name . " Value = " . $surname . "\n";
}
ksort($full_name);
foreach ($full_name as $first_name => $surname) {
	print "Key = " . $first_name . " Value = " . $surname . "\n";
}
echo "End of Example 9" . PHP_EOL . PHP_EOL;


echo "Example 10 - Sorting Arrays (Scalar)" . PHP_EOL;
$numbers = array();
$numbers[]="2";
$numbers[]="8";
$numbers[]="10";
$numbers[]="6";
print $numbers[0] . " ";
print $numbers[1] . " ";
print $numbers[2] . " ";
print $numbers[3];
echo PHP_EOL . "End of Example 10" . PHP_EOL;
?>