PHP按字符串长度分割成数组代码（中英文混杂字符进行分割）

print_r($this->ch2arr('123肉rbv地 方'));Array([0] => 1[1] => 2[2] => 3[3] => 肉[4] => r[5] => b[6] => v[7] => 地[8] => [9] => 方)print_r($this->mbStrSplit('123肉rbv地 方',2));Array([0] => 12[1] => 3肉[2] => rb[3] => v地[4] => 方)//空格也算一个字符//按1个字截取成数组function ch2arr($str){$length = mb_strlen($str, 'utf-8');$array = [];for ($i=0; $i<$length; $i++)$array[] = mb_substr($str, $i, 1, 'utf-8');return $array;}///自定义字数 截取成数组function mbStrSplit ($string, $len=1) {$start = 0;$strlen = mb_strlen($string);while ($strlen) {$array[] = mb_substr($string,$start,$len,"utf8");$string = mb_substr($string, $len, $strlen,"utf8");$strlen = mb_strlen($string);}return $array;}