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，我们需要在引号外的换行符处进行拆分，因为 str_getcsv 不是多行。

我原来是用这个表达的。

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

但是 preg_split 当字符串中超过 XXXX 个字符时，床就乱七八糟了。

所以目前求助于 preg_match_all，但正则表达式选择器需要解决问题。

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")
)

有任何线索可以获取return数组中的所有数据吗？

Answer 1

这是一种解析它的方法。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"
  }
}

Answer 2

如果您需要使用 preg_match_all()，您可以尝试使用此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
        )

)

希望这对您有所帮助:)

PHP 正则表达式多个实例

PHP Regex Multiple Instances

php

regex

csv

preg-match-all

preg-split