<?php
//arrays.php

$empty_array = array();
print_r($empty_array);
echo "1Press Enter to continue ... "; $discard = fgets(STDIN);

$empty_array = [];
print_r($empty_array);
echo "2Press Enter to continue ... "; $discard = fgets(STDIN);

$a[] = 2;
print_r($a);
$a[] = 4;
print_r($a);
$a[] = 6;
print_r($a);
echo "$a[1]\n";
echo count($a) . "\n";
echo sizeof($a) . "\n";
echo "3Press Enter to continue ... "; $discard = fgets(STDIN);

$b = array(1, 3, 5);
$b[] = 7;
print_r($b);
foreach ($b as $i)
    echo "$i\n";
foreach ($b as $key => $value)
    echo "$key => $value\n";
echo "4Press Enter to continue ... "; $discard = fgets(STDIN);

$c = [10, 20, 30];
for ($i = 0; $i<count($c); $i++)
    echo "$c[$i]\n";
echo "5Press Enter to continue ... "; $discard = fgets(STDIN);

$people = array("Peter"=>"35", "Ben"=>"37", "Joe"=>"43");
foreach($people as $key => $value)
    echo "Key=$key, Value=$value\n";
foreach($people as $key => $value)
    echo "Key=$key, Value=$people[$key]\n";
foreach(array_keys($people) as $key)
    echo "Key=$key, Value=$people[$key]\n";
echo $people["Peter"] . "\n";
echo $people['Ben'] . "\n";
echo $people['Joe'] . "\n"; //This is OK
echo "{$people['Joe']}\n"; //And this is OK
echo "$people[Joe]\n";  //And so is this OK
//echo "$people['Joe']\n"; //But this causes an error
echo "6Press Enter to continue ... "; $discard = fgets(STDIN);
?>