如何使用PHP中的正则表达式从字符串中获取带符号的数字

问题描述：

I have the example array of strings like below.

$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]'
);

I wanted to extract the each word and the associated numeric value inside '[' & ']' (only the numbers not the string inside those braces but including the polarity sign ). So the output array must look something like this:

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
    ),
);

Since I am very new to regex and php. Any help would be greately apriciated.

我有如下字符串的示例数组。 p>

   $ arrayOfString = array（
 [0] =＆gt;'客户服务[-3]技术支持[-3]'，
 [1] =＆gt;'图片质量[+2]功能[+2]'，  
 [2] =＆gt;'闻[-2]'，
 [3] =＆gt;'播放器[+2]'，
 [4] =＆gt;'播放器[-3] [u]'  ，
 [5] =＆gt;'DVD播放器[-2]'，
 [6] =＆gt;'播放器[+2] [p]'，
 [7] =＆gt;'格式[+2  ] [u]逐行扫描[-2]'
）; 
  code>  pre> 
 
 我想在'['＆amp ;;'中提取每个单词和相关的数值。  ']'（只有数字不是那些括号内的字符串，但包括极性符号）。 因此输出数组必须如下所示： p> 
 
 
  Array（
 [0] =＆gt;数组（
 ['客户服务'] =＆gt; -3，  
 ['技术支持'] =＆gt; -3 
），
 [1] =＆gt;数组（
 ['图片质量'] =＆gt; + 2，
 ['feature'] =＆gt;  ; +2 
），
 [2] =＆gt;数组（
 ['气味'] =＆gt; -2 
），
 [3] =＆gt;数组（
 ['player']  =＆gt; +2 
），
 [4] =＆gt;数组（
 ['player'] =＆gt; -3 
），
 [5] =＆gt;数组（
 ['播放器 '] =＆gt; -3 
），
 [6] =＆gt;数组（
 ['player'] =＆gt; +2 
），
 [7] =＆gt;数组（
 [  'format'] =＆gt; + 2，
 ['progressive scan'] =＆gt; -2 
），
）; 
  code>  pre> 
 
 因为我 我是regex和php的新手。 任何帮助都会得到很好的帮助。 p> 
  div>

答

$result = array();
foreach ($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;
}

答

You can use this code to get your result array:

$out = array();
foreach ($arrayOfString as $k => $v) {
    if (preg_match_all('/\b([^\[\]]+?)\[([+-]?\d+)\] */', $v, $matches))
        $out[$k] = array_combine ( $matches[1], $matches[2] );
}

Online Working Demo: http://ideone.com/nyE4AW

答

preg_match_all("/([\w ]+[^[]]*)\[([+-]\d*?)\]/", implode(",", $arrayOfString) , $matches);
$result = array_combine($matches[1], $matches[2]);
print_r($result);

Output:

Array
(
    [customer service] => -3
    [ technical support] => -3
    [picture quality] => +2
    [feature] => +2
    [smell] => -2
    [player] => +2
    [dvd player] => -2
    [format] => +2
    [progressive scan] => -2
)

如何使用PHP中的正则表达式从字符串中获取带符号的数字

Online Working Demo: http://ideone.com/nyE4AW

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