php - 如何在php中使用正则表达式从字符串中获取带符号的数字

Question

我有如下所示的示例字符串数组。

$arrayOfString = array(
   [0]=>'customer service[-3] technical support[-3]',
   [1]=>'picture quality[+2]feature[+2]',
   [2]=>'smell[-2]',
   [3]=>'player[+2]',
   [4]=>'player[-3][u]',
   [5]=>'dvd player[-2]',
   [6]=>'player[+2][p]',
   [7]=>'format[+2][u]progressive scan[-2]'
);

我想提取“[”和“]”内的每个单词和关联的数值(只有数字而不是大括号内的字符串，但包括极性符号)。因此输出数组必须如下所示:

Array (
    [0]=> Array(
        ['customer service'] => -3,
        ['technical support'] => -3
    ),
    [1]=> Array(
        ['picture quality'] => +2,
        ['feature'] => +2
    ),
    [2]=> Array(
        ['smell'] => -2
    ),
    [3]=> Array(
        ['player'] => +2
    ),
    [4]=> Array(
        ['player'] => -3
    ),
    [5]=> Array(
        ['player'] => -3
    ),
    [6]=> Array(
        ['player'] => +2
    ),
    [7]=> Array(
        ['format'] => +2,
        ['progressive scan'] => -2
    ),
);

因为我对正则表达式和 php 非常陌生。任何帮助将不胜感激。

Answer 1

$result = array();
foreach ($arrayOfString as $i => $string) {
    preg_match_all('/\b(.+?)\[(.+?)\](?:\[.*?\])*/', $string, $match);
    $subarray = array();
    for ($j = 0; $j < count($match[1]); $j++) {
        $subarray[$match[1][$j]] = $match[2][$j];
    }
    $result[$i] = $subarray;
}