探讨如何将PHP中的字符串转换为数组

array explode ( string $delimiter , string $string [, int $limit = PHP_INT_MAX ] )

$str = "苹果,香蕉,西瓜,橙子";$arr = explode(",", $str);print_r($arr);

Array(    [0] => 苹果    [1] => 香蕉    [2] => 西瓜    [3] => 橙子)

array str_split ( string $string [, int $split_length = 1 ] )

$str = "hello world";$arr = str_split($str);print_r($arr);

Array(    [0] => h    [1] => e    [2] => l    [3] => l    [4] => o    [5] =>    [6] => w    [7] => o    [8] => r    [9] => l    [10] => d)

array preg_split ( string $pattern , string $subject [, int $limit = -1 [, int $flags = 0 ]] )

$str = "Hello World-I am PHP";$arr = preg_split('/s+|-/', $str);print_r($arr);

Array(    [0] => Hello    [1] => World    [2] => I    [3] => am    [4] => PHP)

string implode ( string $glue , array $pieces )

$arr = array("apple", "banana", "grape", "orange");$str = implode(",", $arr);echo $str;

$arr = array("apple", "banana", "grape", "orange");$str = join(",", $arr);echo $str;

array array_merge ( array $array1 [, array $... ] )

$arr1 = array("apple", "banana", "grape", "orange");$arr2 = array("a" => 1, "b" => 2, "c" => 3, "d" => 4);$arr3 = array_merge($arr1, $arr2);print_r($arr3);

Array(    [0] => apple    [1] => banana    [2] => grape    [3] => orange    [a] => 1    [b] => 2    [c] => 3    [d] => 4)