Question

我需要匹配以正则表达式开头的所有行。样本输入。

 #X0 alpha numeric content that  I want
 #X1 something else 
 #X26 this one as well

这两个正则表达式都适用于第一行。我需要匹配所有#X \ d {1,2}行。

     /^(\#X\d{1,2}\s+)(.*?)$/m
     /^(\#X\d{1,2}\s+)(.+)*$/m

我从上面的任何正则表达式中获得了什么。

   $pattern=  "/^(\#X\d{1,2}\s+)(.+)*$/m";
   preg_match($pattern, $content, $match);
   echo $match[1]; 
   alpha numeric content that  I want

期望的输出。

   alpha numeric content that  I want
   something else 
   this one as well

Answer 1

将preg_match_all与PREG_SET_ORDER标志一起使用。例如：

$text = <<<EOT
#X0 alpha numeric content that  I want
#X1 something else
#X26 this one  as well
EOT;

preg_match_all('/^(\#X\d{1,2}\s+)(.*)/m', $text, $matches, PREG_SET_ORDER);
foreach ($matches as $match) {
    echo $match[0] . "\n";
}

<强>更新

对应编辑的问题。

preg_match_all('/^(\#X\d{1,2}\s+)(.*)/m', $text, $matches, PREG_SET_ORDER);
foreach ($matches as $match) {
    echo $match[2] . "\n";
}

正则表达式匹配每一行

1 个答案: