PHP preg_replace 给定的字符串路径

Question

我对 PHP 中的 preg_replace 函数有疑问。我想不出一个模式和一个替代品。

我有这两个字符串和一些代码：

    $dirname1 = 'hdadas/dasdad/dasd/period_1min';
    $dirname2 = 'hdadas/dasdad/dasd/period_1min/abcdrfg.php';

    $pieces1 = explode('/', $dirname1);
    $pieces2 = explode('/', $dirname2);

    $dirname1 = end($pieces1);  // output will be period_1min
    $dirname2 = end($pieces2); // output will be abcdrfg.php

    $output = preg_replace($pattern, $replacement, $dirname1); // or (..,..,$dirname2

    echo $output; // i need 1min(without period_) or abcdrfg (without .php)

更新：

   function Cat($dirname)
   {
      $name = explode('/', $dirname);

      $pattern = ???;
      $replacement = ???;

      return preg_replace($pattern, $replacement, $dirname1);
    }

    print(Cat('hdadas/dasdad/dasd/period_1min'))); // output need 1min only
    print(Cat('hdadas/dasdad/dasd/period_1min/abcdrfg.php'))); // output  need abcdrfg only

Answer 1

这应该适合你：

（这里我用basename() to get only the last part of the path, then I use pathinfo() to get the last part without the extension. After this I just use preg_replace()把下划线前的都换成空串）

<?php

    $dirname1 = "hdadas/dasdad/dasd/period_1min";
    $dirname2 = "hdadas/dasdad/dasd/period_1min/abcdrfg.php";

    $dirname1 = pathinfo(basename($dirname1))["filename"];
    $dirname2 = pathinfo(basename($dirname2))["filename"];

    echo $output = preg_replace("/(.*)_/", "", $dirname1); 


?>

输出：

1min
abcdrfg

Answer 2

这个正则表达式如何 /^.+_|\.[^.]+$/:

$dirname1 = 'hdadas/dasdad/dasd/period_1min';
$dirname2 = 'hdadas/dasdad/dasd/period_1min/abcdrfg.php';

$pieces1 = explode('/', $dirname1);
$pieces2 = explode('/', $dirname2);

$dirname1 = end($pieces1);  // output will be period_1min
$dirname2 = end($pieces2); // output will be abcdrfg.php

$output = preg_replace('/^.+_|\.[^.]+$/', '', $dirname1); // or (..,..,$dirname2
echo $output,"\n"; // i need 1min(without period_) or abcdrfg (without .php)

$output = preg_replace('/^.+_|\.[^.]+$/', '', $dirname2); // or (..,..,$dirname2
echo $output,"\n"; // i need 1min(without period_) or abcdrfg (without .php)

输出：

1min
abcdrfg

PHP preg_replace 给定的字符串路径

PHP preg_replace string path given

php

regex

preg-replace