Whitelisting: This alternative lists all the allowed characters and removes all other characters from the input.

白名单：这种替代方法列出所有允许的字符并从输入中移除所有其它的字符。

youdao

In this case, you use the option FILTER_SANITIZE_STRING, which takes input and removes any HTML tags and optionally encodes or removes special characters.

在这种情况下，使用选项FILTER_SANITIZE_STRING，该选项将获取输入、删除所有HTML标记并选择性地编码或删除特定字符。

youdao

Lines 01 to 05 normalize the input to capital letters and drop all other characters.

行01到05对输入进行规范化，把输入变成大写字母，去掉其他字符。

youdao

Even though my statement said enter a number, in particular, raw input here simply takes in a set of characters and treats it as a string.

即使我的陈述说的是应该输入一个数字，实际上，这里的原始输入会被当做一个字符,的集合来提取并被当做一个字符串来对待。

麻省理工公开课 - 计算机科学及编程导论课程节选

Someone-- or someone had to implement, had to write a tool called printf that itself takes input between quotes and produces as output some characters on the screen.

需要有人去实现，这个printf函数,以双引号间的信息为输入,输出相应字母到屏幕上。

哈佛公开课 - 计算机科学课程节选

Last month, Apple unveiled a host of new features tailored to Chinese users, including integrating its operating systems with Chinese Internet services and making it easier to input Chinese characters.

WSJ: Apple Pays Small Price in China Case

On each image, the watch lets you input text and numbers, up to 24 characters with each image--so you can keep track of the names and phone numbers of people whose pictures you take, for example.

FORBES: Magazine Article

Nokia also created a couple of handsets just for China, the 6108 and 3108, which use stylus input to handle written Chinese characters.

FORBES: Battle To The Top