php分割

// 使用explode()函数
$str = "apple,banana,orange";
$arr = explode(",", $str);
print_r($arr); // 输出: Array ( [0] => apple [1] => banana [2] => orange )

// 使用str_split()函数
$str = "HelloWorld";
$arr = str_split($str, 3);
print_r($arr); // 输出: Array ( [0] => Hel [1] => loW [2] => orl [3] => d )

// 使用preg_split()函数
$str = "apple|banana|orange";
$arr = preg_split("/\|/", $str);
print_r($arr); // 输出: Array ( [0] => apple [1] => banana [2] => orange )

$str = " apple , banana , orange ";
$arr = explode(",", $str);
$arr = array_map('trim', $arr);
print_r($arr); // 输出: Array ( [0] => apple [1] => banana [2] => orange )

$str = "apple,,banana,orange";
$arr = preg_split("/,/", $str);
print_r($arr); // 输出: Array ( [0] => apple [1] =>  [2] => banana [3] => orange )