php如何获得数组的长度

$numbers = array(1, 2, 3, 4, 5);$size = count($numbers);echo "数组长度是：" . $size;

数组长度是：5

$fruits = array(    "apple" => 2,    "banana" => 4,    "orange" => 6);$size = count($fruits);echo "数组长度是：" . $size;

数组长度是：3

$mix = array(    "apple" => 2,    1,    "orange" => 6,    3);$size = count($mix);echo "数组长度是：" . $size;

数组长度是：4

$numbers = array(1, 2, 3, 4, 5);$size = 0;foreach ($numbers as $value) {    $size++;}echo "数组长度是：" . $size;

$fruits = array(    "apple" => 2,    "banana" => 4,    "orange" => 6);$size = 0;foreach ($fruits as $key => $value) {    $size++;}echo "数组长度是：" . $size;