<html> <head> <title>Functions</title> </head> <body> <?php function xin_chao($name = 'ban hien') { echo "Xin chao, {$name}!"; } xin_chao(); ?> </body> </html>
$names = array('hoangtu', 'tin', 'thang', 'tho', 45, 82); foreach ($names as $name) { echo $name . "<br />"; } foreach ($names as $key => $value) { echo $key . " " . $value . "<br />"; } ?> <?php /*tao function*/ function xin_chao($name) { echo "xin chao, {$name}!"; } xin_chao("chi nga"); /*tao function de loc*/ $chuthuong = "day la mot doan chu thuong"; function strong($txt) { echo "<strong>{$txt}</strong>"; } echo $chuthuong . "<br />"; strong($chuthuong); /*return de ket thuc 1 gt*/ return $chuthuong; /*return ve nhieu gt*/ function cong_tru($x, $y) { $tong = $x + $y; $hieu = $x - $y;