php 分割

$str = "apple,banana,grape";
$fruits = explode(",", $str);
print_r($fruits);

Array
(
    [0] => apple
    [1] => banana
    [2] => grape
)

$str = "HelloWorld";
$chars = str_split($str, 3);
print_r($chars);

Array
(
    [0] => Hel
    [1] => loW
    [2] => orl
    [3] => d
)

$str = "apple,banana;grape|orange";
$fruits = preg_split("/[,;|]/", $str);
print_r($fruits);

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

$str = "apple, banana , grape \n";
$fruits = array_map('trim', explode(",", $str));
print_r($fruits);

Array
(
    [0] => apple
    [1] => banana
    [2] => grape
)

$str = "apple,,banana,grape";
$fruits = preg_split("/,/", $str);
print_r($fruits);

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