按Enter键时出现preg_match错误消息

Question

I have the following code in php, which enables field "news" to get only the characters a-z and numbers 0-9 and space. How can I modify it, so except a-z, 0-9 and space to get "enter"? because when I type enter I get the error message "News field, must only contains a-z, 0-9 characters and spaces"

if( preg_match("&[^a-zA-Z0-9 ]&",$_POST['news']) ){
    $errors[]='<font color="#963">News field, must only contains a-z, 0-9 characters and spaces</font>';
} preg_replace("&[^a-zA-Z0-9 ]&","",$_POST['news']);    

Answer 1

Try this:

&[^a-zA-Z0-9\s]&

the \s should find any type of whitespace, including newlines and spaces. if you only want spaces and newlines (not tabs or other whitespace) you can do &[^a-zA-Z0-9 ]& instead.