使用php / regex验证美国电话号码

Question

编辑：
我已经混合并修改了下面给出的两个答案，以形成完整的功能，它现在可以完成我想要的，然后执行某些操作…所以我想我将它张贴在这里，以防其他任何人寻找相同的内容事情。

/*
 * Function to analyze string against many popular formatting styles of phone numbers
 * Also breaks phone number into it's respective components
 * 3-digit area code, 3-digit exchange code, 4-digit subscriber number
 * After which it validates the 10 digit US number against NANPA guidelines
*/
function validPhone($phone) {

  $format_pattern = '/^(?:(?:\((?=\d{3}\)))?(\d{3})(?:(?<=\(\d{3})\))?[\s.\/-]?)?(\d{3})[\s\.\/-]?(\d{4})\s?(?:(?:(?:(?:e|x|ex|ext)\.?\:?|extension\:?)\s?)(?=\d+)(\d+))?$/';
  $nanpa_pattern = '/^(?:1)?(?(?!(37|96))[2-9][0-8][0-9](?<!(11)))?[2-9][0-9]{2}(?<!(11))[0-9]{4}(?<!(555(01([0-9][0-9])|1212)))$/';

  //Set array of variables to false initially
  $valid = array(
    'format' => false,
    'nanpa' => false,
    'ext' => false,
    'all' => false
  );

  //Check data against the format analyzer
  if(preg_match($format_pattern, $phone, $matchset)) {
    $valid['format'] = true;    
  }

  //If formatted properly, continue
  if($valid['format']) {

    //Set array of new components
    $components = array(
      'ac' => $matchset[1], //area code
      'xc' => $matchset[2], //exchange code
      'sn' => $matchset[3], //subscriber number
      'xn' => $matchset[4], //extension number
    );

    //Set array of number variants
    $numbers = array(
      'original' => $matchset[0],
      'stripped' => substr(preg_replace('[\D]', '', $matchset[0]), 0, 10)
    );

    //Now let's check the first ten digits against NANPA standards
    if(preg_match($nanpa_pattern, $numbers['stripped'])) {
      $valid['nanpa'] = true;
    }

    //If the NANPA guidelines have been met, continue
    if($valid['nanpa']) {
      if(!empty($components['xn'])) {
        if(preg_match('/^[\d]{1,6}$/', $components['xn'])) {
          $valid['ext'] = true;
        }
      }
      else {
        $valid['ext'] = true;
      }
    }

    //If the extension number is valid or non-existent, continue
    if($valid['ext']) {
      $valid['all'] = true;
    }
  }
  return $valid['all'];
}

Answer 1

您可以使用先行断言来解决此问题。基本上，我们要说的是我想要一系列特定的字母（例如，ex，ext，x，extension），然后是一个或多个数字。但我们也想涵盖根本没有扩展的情况。

旁注，您不需要在诸如[\ s]或其后的[x]之类的单个字符周围加括号。另外，您可以将原本位于同一位置的字符分组，因此可以使用[\ s \ ./]代替\
s？\。？/?。意思是“这些字符中的任何一个”

这是regex的更新，也可以在这里解决您的评论。我已经在实际代码中添加了解释。

<?php
    $sPattern = "/^
        (?:                                 # Area Code
            (?:                            
                \(                          # Open Parentheses
                (?=\d{3}\))                 # Lookahead.  Only if we have 3 digits and a closing parentheses
            )?
            (\d{3})                         # 3 Digit area code
            (?:
                (?<=\(\d{3})                # Closing Parentheses.  Lookbehind.
                \)                          # Only if we have an open parentheses and 3 digits
            )?
            [\s.\/-]?                       # Optional Space Delimeter
        )?
        (\d{3})                             # 3 Digits
        [\s\.\/-]?                          # Optional Space Delimeter
        (\d{4})\s?                          # 4 Digits and an Optional following Space
        (?:                                 # Extension
            (?:                             # Lets look for some variation of 'extension'
                (?:
                    (?:e|x|ex|ext)\.?       # First, abbreviations, with an optional following period
                |
                    extension               # Now just the whole word
                )
                \s?                         # Optionsal Following Space
            )
            (?=\d+)                         # This is the Lookahead.  Only accept that previous section IF it's followed by some digits.
            (\d+)                           # Now grab the actual digits (the lookahead doesn't grab them)
        )?                                  # The Extension is Optional
        $/x";                               // /x modifier allows the expanded and commented regex

    $aNumbers = array(
        '123-456-7890x123',
        '123.456.7890x123',
        '123 456 7890 x123',
        '[phone] x123',
        '123.456.7890x.123',
        '123.456.7890 ext. 123',
        '123.456.7890 extension 123456',
        '123 456 7890', 
        '123-456-7890ex123',
        '123.456.7890 ex123',
        '123 456 7890 ext123',
        '456-7890',
        '456 7890',
        '456 7890 x123',
        '1234567890',
        '() 456 7890'
    );

    foreach($aNumbers as $sNumber) {
        if (preg_match($sPattern, $sNumber, $aMatches)) {
            echo 'Matched ' . $sNumber . "\n";
            print_r($aMatches);
        } else {
            echo 'Failed ' . $sNumber . "\n";
        }
    }
?>

和输出：

Matched 123-456-7890x123
Array
(
    [0] => 123-456-7890x123
    [1] => 123
    [2] => 456
    [3] => 7890
    [4] => 123
)
Matched 123.456.7890x123
Array
(
    [0] => 123.456.7890x123
    [1] => 123
    [2] => 456
    [3] => 7890
    [4] => 123
)
Matched 123 456 7890 x123
Array
(
    [0] => 123 456 7890 x123
    [1] => 123
    [2] => 456
    [3] => 7890
    [4] => 123
)
Matched [phone] x123
Array
(
    [0] => [phone] x123
    [1] => 123
    [2] => 456
    [3] => 7890
    [4] => 123
)
Matched 123.456.7890x.123
Array
(
    [0] => 123.456.7890x.123
    [1] => 123
    [2] => 456
    [3] => 7890
    [4] => 123
)
Matched 123.456.7890 ext. 123
Array
(
    [0] => 123.456.7890 ext. 123
    [1] => 123
    [2] => 456
    [3] => 7890
    [4] => 123
)
Matched 123.456.7890 extension 123456
Array
(
    [0] => 123.456.7890 extension 123456
    [1] => 123
    [2] => 456
    [3] => 7890
    [4] => 123456
)
Matched 123 456 7890
Array
(
    [0] => 123 456 7890
    [1] => 123
    [2] => 456
    [3] => 7890
)
Matched 123-456-7890ex123
Array
(
    [0] => 123-456-7890ex123
    [1] => 123
    [2] => 456
    [3] => 7890
    [4] => 123
)
Matched 123.456.7890 ex123
Array
(
    [0] => 123.456.7890 ex123
    [1] => 123
    [2] => 456
    [3] => 7890
    [4] => 123
)
Matched 123 456 7890 ext123
Array
(
    [0] => 123 456 7890 ext123
    [1] => 123
    [2] => 456
    [3] => 7890
    [4] => 123
)
Matched 456-7890
Array
(
    [0] => 456-7890
    [1] => 
    [2] => 456
    [3] => 7890
)
Matched 456 7890
Array
(
    [0] => 456 7890
    [1] => 
    [2] => 456
    [3] => 7890
)
Matched 456 7890 x123
Array
(
    [0] => 456 7890 x123
    [1] => 
    [2] => 456
    [3] => 7890
    [4] => 123
)
Matched 1234567890
Array
(
    [0] => 1234567890
    [1] => 123
    [2] => 456
    [3] => 7890
)
Failed () 456 7890