正则表达式正则表达式可验证输入：两个单词之间有一个空格

Question

i need to use a regular expression to validate a field with php that has to have two words separated by a space like: "First Last" but i cant find one that fits my purposes, can anyone help me?

The best i've done is ^[a-zA-Z0-9_\\s]*$ but with this i can have more than one space and anywhere in the field and i want only between the words. Can anyone help me?

Answer 1

Something like ^\\w+\\s\\w+$ ought to work for this case. But you don't necessarily need to use regular expressions for this, you could just use explode() .

Answer 2

^[^\s]+\s[^\s]+$

• [^\\s]+ matches one or more characters, except whitespace characters;
• \\s matches a single whitespace character.

Answer 3

这可能会解决问题

^[a-zA-Z0-9]+ {1}[a-zA-Z0-9]+$