从字符串中提取以字母开头的单词

Question

我想提取所有以@开头的单词以字符串形式与php。

哪种方式最好？

编辑：我不想去取邮件

感谢

Answer 1

$matches = null; 
preg_match_all('/(?!\b)(@\w+\b)/','This is the @string to @test.',$matches) 

使用preg_match_all并采取前瞻的单词的开始（(?!\b)）和字分隔符（\b）的优势，你可以轻松实现这一点。分解：

/   # beginning of pattern 
    (?!\b) # negative look-ahead for the start of a word 
    (  # begin capturing 
    @  # look for the @ symbol 
    \w+  # match word characters (a-z, A-Z, 0-9 & _) 
    \b  # match until end of the word 
)   # end capturing 
/   # end of pattern 

demo