Indexed arrays

                
                    <?php
                    $cars = array("Volvo", "BMW", "Toyota"); 
                    echo "I like " . $cars[0] . ", " . $cars[1] . " and " . $cars[2] . ".";
                    ?>
                
                

count() - Return the length of an array

                
                    <?php
                    $cars = array("Volvo", "BMW", "Toyota");
                    echo count($cars);
                    ?>
                
                

Loop through an indexed array

                
                    <?php
                    $cars = array("Volvo", "BMW", "Toyota");
                    $arrlength = count($cars);
                    
                    for($x = 0; $x < $arrlength; $x++) {
                      echo $cars[$x];
                      echo "<br>";
                    }
                    ?>
                
                

Associative arrays

                
                    <?php
                    $age = array("Peter"=>"35", "Ben"=>"37", "Joe"=>"43");
                    echo "Peter is " . $age['Peter'] . " years old.";
                    ?>
                
                

Loop through an associative array

                
                    <?php
                    $age = array("Peter"=>"35", "Ben"=>"37", "Joe"=>"43");
                    
                    foreach($age as $x => $x_value) {
                      echo "Key=" . $x . ", Value=" . $x_value;
                      echo "<br>";
                    }
                    ?>