Tạo 1 hàm trong PHP:

php

<?php

$x=array("aaa","ttt","www","ttt","yyy","tttt");

$y=array _ count _ values($x);

echo $y["ttt"]

?>

php

<?php

$arr = array(5 => 1, 12 => 2);

$arr[] = 56;

$arr["x"] = 42;

unset($arr);

echo var_dump($arr);

?>

php

<?php

$team = "arsenal";

switch ($team) {

case "manu":

echo "I love man u";

case "arsenal":

echo "I love arsenal";

case "manc":

echo "I love manc"; }

?>

php

<?php

echo chr(52);

?>

php

<?php

$fruits = array("apple", "orange", "banana");

echo (next($fruits));

echo (next($fruits));

?>

php

<?php

$number = array("4", "hello", 2);

echo (array_sum($number));

?>

php

<?php

function mine($m)

{

if ($m < 0)

echo "less than 0";

if ($m >= 0)

echo "Not True";

}

mine(0);

?>