检查字符串是否仅包含英文字母，数字和符号(Check if string contains only English alphabets , digits and symbols)

检查字符串是否仅包含英文字母，数字和符号(Check if string contains only English alphabets , digits and symbols)

我想检查只包含英文字母，数字和符号的字符串。我试过下面的代码，但它只适用于所有字符都是不同的语言。

if(strlen($string) != mb_strlen($string, 'utf-8')) { echo "o English words "; } else { echo "only english words"; }

例如

1. hellow hi 12#!@#!@#()#@# -- true 2. ព្រាប សុវ ok yes #@# - false . this is good 12 - true 4. ព្រាប -- false

ps：我的问题不重复，因为其他问题只涵盖字母和符号，我的覆盖符号也是如此

I want to check for string that contains only english alphabets , digits and symbols.I tried below code but it works only when all the characters are different language.

if(strlen($string) != mb_strlen($string, 'utf-8')) { echo "o English words "; } else { echo "only english words"; }

For example

1. hellow hi 12#!@#!@#()#@# -- true 2. ព្រាប សុវ ok yes #@# - false . this is good 12 - true 4. ព្រាប -- false

p.s : my question is not duplicate because other questi only cover alphabets and symbols , mine covers symbol too

最满意答案

确定一个字符串是否只是可打印的ASCII工作？ 如果是这样，你可以使用这个正则表达式：

[ -~]

http:///blog/my-favorite-regex/

如果您还需要非ASCII字符，则可以使用Wikipedia页面获取所需的特定unicode格式：

https://en./wiki/List_of_Unicode_characters#Control_codes

Would determining if a string is just printable ASCII work? If so you can use this regex:

[ -~]

http:///blog/my-favorite-regex/

If you need non ASCII characters as well than you can use the Wikipedia page to get the specific unicode formats that you need:

https://en./wiki/List_of_Unicode_characters#Control_codes