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我有个字符串，格式为$str = "中华人民abc共和\x01国"，如何逐个汉字遍历该字符串呢？即：能够输出“中” “华” “人” “民” “a” ...
我现在使用的方法是：for($i =0 ; $i < len ; $i++) {$sub_str = mb_substr($str, $i, 1)}，但这样做效率太低。
请问应该如何提高效率？是否可以讲$str转换为数组？
闭关修行中......
function str_split_unicode($str, $l = 0) { if ($l > 0) { $ret = array(); $len = mb_strlen($str, "UTF-8"); for ($i = 0; $i < $len; $i += $l) { $ret[] = mb_substr($str, $i, $l, "UTF-8"); } return $ret; } return preg_split("//u", $str, -1, PREG_SPLIT_NO_EMPTY); } $s = '中华人民abc共和\x01国'; print_r(str_split_unicode($s)); Array ( [0] => 中 [1] => 华 [2] => 人 [3] => 民 [4] => a [5] => b [6] => c [7] => 共 [8] => 和 [9] => \ [10] => x [11] => 0 [12] => 1 [13] => 国 )
//UTF8算法，其它编码自行转换
$cind = 0; $arr_cont = array(); for ($i = 0; $i < strlen($tempaddtext); $i++) { if (strlen(substr($tempaddtext, $cind, 1)) > 0) { if (ord(substr($tempaddtext, $cind, 1)) < 192) { //如果为英文则取1个字节 if (substr($tempaddtext, $cind, 1) != " ") { array_push($arr_cont, substr($tempaddtext, $cind, 1)); } $cind++; } elseif(ord(substr($tempaddtext, $cind, 1)) < 224) { array_push($arr_cont, substr($tempaddtext, $cind, 2)); $cind+=2; } else { array_push($arr_cont, substr($tempaddtext, $cind, 3)); $cind+=3; } } } print_r($arr_cont);
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//UTF8算法，其它编码自行转换