PHP 返回文本正文中与模式匹配的所有变量的列表

Question

我有这样一段文字：

Lorem Ipsum %final_walk_through_date% 只是 印刷和排版行业。 %buyer_full_name% Lorem Ipsum 有 自 1500 年代以来一直是行业的标准虚拟文本，当时 不知名的打印机拿了一个打字机，并把它打乱成一个打字机 标本书。它不仅经历了五个世纪，而且 跳入电子排版，基本保持不变。它 在 1960 年代随着 Letraset 床单的发布而普及 包含 Lorem Ipsum 段落，最近还有桌面 发布软件，如 Aldus PageMaker，包括 Lorem 版本 Ipsum %buying_side_commission_percent%。 %escrow_officer_first_name% 和 %ccrs_date%。

我想使用 PHP 扫描这段文本并查找具有这种模式 %variable_name% 的任何变量，然后将该值添加到数组中。

最后我会得到一个如下所示的数组：

array[
     '%final_walk_through_date%',
     '%buyer_full_name%',
     '%buying_side_commission_percent%',
     '%escrow_officer_first_name%',
     '%ccrs_date%'
]

如何做到这一点？

Answer 1

这基本上正是preg_match_all 的用途：

$s = "Lorem Ipsum %final_walk_through_date% is simply dummy text of the printing and typesetting industry. %buyer_full_name% Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum %buying_side_commission_percent%. %escrow_officer_first_name% and %ccrs_date%.";

preg_match_all('/%[^%]*%/', $s, $matches);

var_dump($matches);

https://3v4l.org/Rvc5n

Answer 2

你可以使用preg_match_all()：

preg_match_all('~%\w+%~', $text, $matches);
print_r($matches[0]);

输出：

Array
(
    [0] => %final_walk_through_date%
    [1] => %buyer_full_name%
    [2] => %buying_side_commission_percent%
    [3] => %escrow_officer_first_name%
    [4] => %ccrs_date%
)

Answer 3

这也可以在没有正则表达式的情况下完成。
您可以在 % 上使用explode 和explode，而带有空格的数组项是不是 变量。

$str = "Lorem Ipsum %final_walk_through_date% is simply dummy text of the printing and typesetting industry. %buyer_full_name% Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum %buying_side_commission_percent%. %escrow_officer_first_name% and %ccrs_date%.";
$arr = explode("%", $str . " "); 
// Adding space to end of string to make sure it removes last part if it's not a variable
$newArr = array_filter($arr, function($v){
    If(strpos($v, " ") === false) return $v;
});

var_dump($newArr);

如果您需要重置数组索引，您可以使用 array_values 使其重新从 0 开始计数。

https://3v4l.org/909Zd

---

它的 mickmackusa 版本：

$str = "%start_of_input% Lorem Ipsum %final_walk_through_date% is simply dummy text of the printing and typesetting industry. %buyer_full_name% Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum %buying_side_commission_percent%. %escrow_officer_first_name% and %ccrs_date%.";
$arr = explode("%", " " . $str . " ");
$newArr = array_filter($arr, function($v){
    return strpos($v, " ")===false ? true : false;
});

var_dump($newArr);