Question

你能帮我找到preg_replace语法，这样我可以复制丢失的价格吗？主题是：

...nomaterwhat13124123,"321,00",,nomaterwhat
...nomaterwhat12321,"322,20","134,00",nomaterwhat
...nomaterwhat1321,"211,00",,nomaterwhat
...nomaterwhat31313,"241,00",,nomaterwhat

我的输出想要：

...nomaterwhat13124123,"321,00","321,00",nomaterwhat
...nomaterwhat12321,"322,20","134,00",nomaterwhat
...nomaterwhat1321,"211,00","211,00",nomaterwhat
...nomaterwhat31313,"241,00","241,00",nomaterwhat

我试过

preg_replace("(\W+),,nomaterwhat$", "$1,$1,nomaterwhat", $string);

Answer 1

如果你使用str_getcsv，你可以这样做：

$data = "CSV VALUES";

$lines = explode("\n", $data);
foreach ($lines as $line) {
    $temp = str_getcsv($line);
    echo '<pre>' . print_r($temp, true) . '</pre>';
}

然后你可以把它们放到一个像这样的数组中：

$data = "CSV VALUES";
$lines = explode("\n", $data);
$output = array();
foreach ($lines as $line) {
    $temp = str_getcsv($line);
    $temp[5] = ($temp[5] == '') ? $temp[4] : $temp[5];
    $output[] = $temp;
}
echo '<pre>' . print_r($output, true) . '</pre>';

将$temp[5]替换为第二个价格的位置。

Answer 2

忽略更复杂的情况应该这样做：

FindNextFile

Answer 3

你的正则表达式有一些问题。
1.没有分隔符
2.没有m修饰符，因此$是字符串的结尾，而不是行。
3. \W+是非a-z，0-9和/或_所以你不会得到无论如何都有金钱价值。

试试这个：

$string = '...nomaterwhat13124123,"321,00",,nomaterwhat
...nomaterwhat12321,"322,20","134,00",nomaterwhat
...nomaterwhat1321,"211,00",,nomaterwhat
...nomaterwhat31313,"241,00",,nomaterwhat';
echo preg_replace("/,(\"\d+,\d{2}\"),,nomaterwhat$/m", ",$1,$1,nomaterwhat", $string);

输出：

...nomaterwhat13124123,"321,00","321,00",nomaterwhat
...nomaterwhat12321,"322,20","134,00",nomaterwhat
...nomaterwhat1321,"211,00","211,00",nomaterwhat
...nomaterwhat31313,"241,00","241,00",nomaterwhat

正则表达式演示：https://regex101.com/r/hE2zQ7/1

PHP演示：http://ideone.com/OanPN1

在主题中使用逗号进行反向引用preg_replace

3 个答案: