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HomeBackend DevelopmentPHP Tutorial怎么替换一个字符串中间的字符

怎么替换一个字符串中间的字符?
比如: fdsfdsfdsjkww
替换成:f**********w
比如: 扣分金锡民
替换成:扣***民
比如: 扣分金锡民s
替换成:扣****s
比如: tt扣分金锡民s
替换成:t*****s


回复讨论(解决方案)

<?php$str ='tt扣分金锡民s';function hide_repalce($str, $code='utf-8') {	mb_internal_encoding($code);	$len = mb_strlen($str);	return mb_substr($str, 0, 1) . str_repeat('*', $len - 2) . mb_substr($str, $len - 1, 1);}echo hide_repalce($str);

Replace ( string1, start, string2,n,m )

<?php$str ='tt扣分金锡民s';function hide_repalce($str, $code='utf-8') {	mb_internal_encoding($code);	$len = mb_strlen($str);	return mb_substr($str, 0, 1) . str_repeat('*', $len - 2) . mb_substr($str, $len - 1, 1);}echo hide_repalce($str);


有乱码,看到吗?

乱码要看你的编码是什么 设置正确的编码

$string='fdsfdsfdsjkww';
echo substr($string,0,1).'*****'.substr($string,$sLeng-1,1);


<?php$str ='tt扣分金锡民s';function hide_repalce($str, $code='utf-8') {	mb_internal_encoding($code);	$len = mb_strlen($str);	return mb_substr($str, 0, 1) . str_repeat('*', $len - 2) . mb_substr($str, $len - 1, 1);}echo hide_repalce($str);


有乱码,看到吗?

如果是使用utf8-编码,源文件的编码、输出显示的编码都要用utf-8

简单点的

$string='fdsfdsfdsjkww';echo substr_replace($string, str_repeat('*',strlen($string)-2), 1, strlen($string)-2);

注意长度问题,在不同编码下,中文和英文的字节会不一样的,多以长度要计算对了,不然会出现乱码

$string='fdsfdsfdsjkww';echo substr_replace($string, str_repeat('*',strlen($string)-2), 1, strlen($string)-2);

这个相对比较简单

substr_replace ? 替换字符串的子串

string
输入字符串。

replacement
替换字符串。

start
如果 start 为正数,替换将从 string 的 start 位置开始。

如果 start 为负数,替换将从 string 的倒数第 start 个位置开始。

length
如果设定了这个参数并且为正数,表示 string 中被替换的子字符串的长度。如果设定为负数,它表示待替换的子字符串结尾处距离 string 末端的字符个数。如果没有提供此参数,那么它默认为 strlen( string ) (字符串的长度)。当然,如果 length 为 0,那么这个函数的功能为将 replacement 插入到 string 的 start 位置处

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