Question

我想知道是否可以在preg_replace中获取正则表达式匹配并实时操作它（哇...在相同的preg_replace命令中）...

这不是正确的语法，只是为了得到这个想法......

    $test = <<<EOF

    <!--

    THIS IS COMMENT #1

    -->

    <!--

    THIS IS COMMENT #2

    -->
    EOF;

    $test = preg_replace('#<--(.|\s)*?-->#', 'Additional line to the html comment without delete the real comment' . '#<--(.|\s)*?-->#' .'<BR/>' , $test);

    //iow... how can I replace this '#<--(.|\s)*?-->#'
//to this : 'Additional line to the html comment without delete the real comment' . '#<--(.|\s)*?-->#' .'<BR/>'

    echo $test;

    /*
    I expect to get this :

    <!--
    Additional line to the html comment without delete the real comment
    THIS IS COMMENT #1

    -->

    <!--
    Additional line to the html comment without delete the real comment
    THIS IS COMMENT #2

    -->
    */

有什么想法吗？：/

Answer 1

怎么样：

$test = preg_replace('#(<--)(.+?)(-->)#', '$1Additional line to the html comment without delete the real comment$2$3' , $test);

Answer 2

如果您的评论在开头时总是有两个换行符，那么快速使用正则表达式：

$trans = array("<!--\n\n" => "<!--\n$newline",
               "<!--\r\n\r\n" => "<!--\r\n$newline");

$str = strtr($str, $trans);

使用preg_replace实时添加行

2 个答案: