我只是试图将$str固定为5个字符,但不能.
$str = "nü"; echo str_pad($str,5,"ü"); // give nüü
我知道这是一个unicode的问题,搜索了很多,但没有运气.我尝试过某些事情,如;
echo str_pad($str,4 + mb_strlen($s),$s); echo str_pad($str,5 + mb_strlen($s),$s);
我也试过这个http://www.php.net/manual/de/function.str-pad.php#89754,看到这个https://stackoverflow.com/a/11871948/362780.
关于这个问题的任何经验？
谢谢.
我想你需要看更多PHP.net(这里：
http://php.net/str_pad#111147).但我改变了一点.
注意：不要忘记在mb_internal_encoding(“utf-8”)之前调用它
mb_internal_encoding("utf-8");
function str_pad_unicode($str,$pad_len,$pad_str = ' ',$dir = STR_PAD_RIGHT) {
$str_len = mb_strlen($str);
$pad_str_len = mb_strlen($pad_str);
if (!$str_len && ($dir == STR_PAD_RIGHT || $dir == STR_PAD_LEFT)) {
$str_len = 1; // @debug
}
if (!$pad_len || !$pad_str_len || $pad_len <= $str_len) {
return $str;
}
$result = null;
if ($dir == STR_PAD_BOTH) {
$length = ($pad_len - $str_len) / 2;
$repeat = ceil($length / $pad_str_len);
$result = mb_substr(str_repeat($pad_str,$repeat),floor($length))
. $str
. mb_substr(str_repeat($pad_str,ceil($length));
} else {
$repeat = ceil($str_len - $pad_str_len + $pad_len);
if ($dir == STR_PAD_RIGHT) {
$result = $str . str_repeat($pad_str,$repeat);
$result = mb_substr($result,$pad_len);
} else if ($dir == STR_PAD_LEFT) {
$result = str_repeat($pad_str,$pad_len - (($str_len - $pad_str_len) + $pad_str_len))
. $str;
}
}
return $result;
}
$t = STR_PAD_LEFT;
$s = '...';
$as = 'AO';
$ms = 'ÄÖ';
echo "<pre>\n";
for ($i = 3; $i <= 1000; $i++) {
$s1 = str_pad($s,$i,$as,$t); // can not inculde unicode char!!!
$s2 = str_pad_unicode($s,$ms,$t);
$l1 = strlen($s1);
$l2 = mb_strlen($s2);
echo "len $l1: $s1 \n";
echo "len $l2: $s2 \n";
echo "\n";
if ($l1 != $l2) die("Fail!");
}
echo "</pre>";
