PHP Codeigniter通過正則表達式將字符串拆分為數組

Question

我有一個文本文件，想使用正則表達式將文本拆分為數組。 但是我對regex並不陌生，不知道如何使用它。 文本文件格式基本上是這樣的：

0,"20"1,"100000050"25,"100000050"19,""11,"Masuda"12,"Jin"
I want to split them like:
0: 0,"20"
1: 1,"100000050"
2: 25,"100000050"
...

請幫忙！ 任何答案將不勝感激！

Answer 1

使用preg_split（）函數。 它的操作與split（）完全一樣，只是正則表達式被接受為pattern的輸入參數。

使用PREG_SPLIT_DELIM_CAPTURE以定界符模式返回帶括號的表達式。

preg_split(
  '/([\d]+,\"[0-9a-zA-Z]+\")/',
  $str,
  -1,
  PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY
);

/([\\d]+,\\"[0-9a-zA-Z]+\\")/是正則表達式。

/ = start or end of pattern string
[ ... ] = grouping of characters
\d - digits
+ = one or more of the preceeding character or group
, = the literal comma character
\" = the literal quote character
[0-9a-zA-Z] = numbers and letters

Answer 2

這似乎是一種怪異的格式，所以我可能會錯過一些東西，但這應該可行：

([0-9]+,\"([0-9a-z ]+)?\")

細節

[0-9]+            match a digit one or more times (this seems to be an ID of sorts)
,                 match a literal comma
\"([0-9a-z ]+)?\" match an alphanumeric character or a space one or more times, optionally (you have an empty string), between quotes
i                 flag to make it case insensitive

將其與preg_match_all()配對以獲取數組中的所有匹配項：

<?php
$string = '0,"20"1,"100000050"25,"100000050"19,""11,"Masuda"12,"Jin"';
preg_match_all("/([0-9]+,\"([0-9a-z]+)?\")/i", $string, $m);
var_dump($m);

第一個陣列將滿足您的需求。

演示