PHP中的常用数组函数以及方法有哪些

PHP中的常用数组函数以及方法有：

1、array_push()把一个或多个元素添加到数组末尾

示例：

$my_array = array("apple", "banana");
array_push($my_array, "orange", "peach");
print_r($my_array);

结果为：

Array
(
    [0] => apple
    [1] => banana
    [2] => orange
    [3] => peach
)

2、count()返回数组中元素的数量

示例：

$my_array = array("apple", "banana", "orange");
$count = count($my_array);
echo "The count of my_array is " . $count;

结果为：

The count of my_array is 3

3、array_pop()删除并返回数组末尾的元素

示例：

$my_array = array("apple", "banana", "orange");
$last_element = array_pop($my_array);
print_r($my_array);
echo "The last element was " . $last_element;

结果为：

Array
(
    [0] => apple
    [1] => banana
)
The last element was orange

4、array_shift()删除并返回数组开头的元素

示例：

$my_array = array("apple", "banana", "orange");
$first_element = array_shift($my_array);
print_r($my_array);
echo "The first element was " . $first_element;

结果为：

Array
(
    [0] => banana
    [1] => orange
)
The first element was apple

5、sort()对数组按升序排序

示例：

$my_array = array(9, 2, 5, 3, 8);
sort($my_array);
print_r($my_array);

结果为：

Array
(
    [0] => 2
    [1] => 3
    [2] => 5
    [3] => 8
   ）