PHP 正则表达式多个实例

Question

我目前正在导入 CSV 数据，需要将其全部整理好。

较小的示例数据如下。

"Name","Address"
"John Doe","5111 Fury Rd
Santa Cruz"
"Jane Doe","321 Tess St Texas"
"Josh Doe","653 1st St 
Orlando Florida
United States"

如您所见，我们需要在引号之外的换行符处进行拆分，因为 str_getcsv 不是多行的。

我最初使用过这个表达方式。

$lines = preg_split('/[\r\n]{1,2}(?=(?:[^\"]*\"[^\"]*\")*(?![^\"]*\"))/',$data);

但是当字符串中的字符数超过 XXXX 时，preg_split 就搞砸了。

所以目前使用 preg_match_all 但需要正则表达式选择器的问题。

preg_match_all('/^(.*?)[\r\n]{1,2}(?=(?:[^\"]*\"[^\"]*\")*(?![^\"]*\"))/', $data, $matches);

目前只匹配第一个实例。

Array(
    [0] => Array ( [0] => "Name","Address")
    [1] => Array ( [0] => "Name","Address")
)

有什么线索可以让它返回数组中的所有数据？

Answer 1

如果你需要使用preg_match_all()，你可以尝试这个模式来创建一个匹配数组，然后将str_getcsv()映射到结果上；例如：

<?php

$csvString = <<<CSV
"Name","Address"
"John Doe","5111 Fury Rd
Santa Cruz"
"Jane Doe","321 Tess St Texas"
"Josh Doe","653 1st St
Orlando Florida
United States
CSV;


preg_match_all('/(.*)(?:\n)/m', $csvString, $csvRows);

$csvData = array_map(function ($csvRow) {
    return str_getcsv($csvRow);
}, $csvRows[1]);

print_r($csvData);

鉴于您的示例输入，这会产生：

Array
(
    [0] => Array
        (
            [0] => Name
            [1] => Address
        )

    [1] => Array
        (
            [0] => John Doe
            [1] => 5111 Fury Rd
        )

    [2] => Array
        (
            [0] => Santa Cruz"
        )

    [3] => Array
        (
            [0] => Jane Doe
            [1] => 321 Tess St Texas
        )

    [4] => Array
        (
            [0] => Josh Doe
            [1] => 653 1st St
        )

    [5] => Array
        (
            [0] => Orlando Florida
        )

)

希望这会有所帮助:)

Answer 2

这是解析它的一种方法。我已经注释掉了地址中删除新行的部分。如果你想要它，只需删除评论。

$re = '/\"(.*?)\",\"(.*?)\"/s';
$data = '"Name","Address"
"John Doe","5111 Fury Rd
Santa Cruz"
"Jane Doe","321 Tess St Texas"
"Josh Doe","653 1st St
Orlando Florida
United States"';

preg_match_all($re, $data, $matches);

/*
foreach($matches[2] as &$value){
    $value = str_replace(PHP_EOL, " ", $value);
}
*/
var_dump($matches);

https://3v4l.org/7kRDt

foreach 的输出：

array(3) {
  [0]=>
  array(4) {
    [0]=>
    string(16) ""Name","Address""
    [1]=>
    string(36) ""John Doe","5111 Fury Rd
Santa Cruz""
    [2]=>
    string(30) ""Jane Doe","321 Tess St Texas""
    [3]=>
    string(53) ""Josh Doe","653 1st St
Orlando Florida
United States""
  }
  [1]=>
  array(4) {
    [0]=>
    string(4) "Name"
    [1]=>
    string(8) "John Doe"
    [2]=>
    string(8) "Jane Doe"
    [3]=>
    string(8) "Josh Doe"
  }
  [2]=>
  array(4) {
    [0]=>
    string(7) "Address"
    [1]=>
    string(23) "5111 Fury Rd Santa Cruz"
    [2]=>
    string(17) "321 Tess St Texas"
    [3]=>
    &string(40) "653 1st St Orlando Florida United States"
  }
}