【手机选号网】手机号规律匹配方案

方案一：

<?php
function checkIt($number) {
    $modes = array( 'AAAAAAAAA','AAAABBBB', 'AABBCCDD', 'ABABCDCD', 'AAABAAAB', 'AABBAABB', 'ABCDABCD',
                    'AAAAAA', 'ABCDEFG',
                    'AAAAAA', 'ABBABB', 'AAAABB', 'AAABBB', 'AABBCC', 'ABABAB', 'ABCABC',
                    'AAAAA', 'AABBB', 'AAAAB', 'AAABB',
                    'AAAA', 'ABAB', 'AABB', 'ABBA', 'AAAB', '####'/*升降序*/,
                    'AAA', '###'/*升降序*/,
                    'AA' ); //前后排序有优先级,只要有一个匹配,后面的就不再检索了
    $result = 'unknown';
    foreach ($modes as $mode) {
        $len = strlen($mode);
        $s = substr($number, -$len);
        $temp = array();
        $match = true;
        for ($i=0; $i<$len; $i++) {
            if ($mode[$i]=='#') {
                if (!isset($temp['step'])) {
                    $temp['step'] = 0;
                    $temp['current'] = intval($s[$i]);
                } elseif ($temp['step'] == 0) {
                    $temp['step'] = $temp['current'] - intval($s[$i]);
                    if ($temp['step'] != -1 && $temp['step'] != 1) {
                        $match = false;
                        break;
                    } else {
                        $temp['current'] = intval($s[$i]);
                    }
                } else {
                    $step = $temp['current'] - intval($s[$i]);
                    if ($step != $temp['step']) {
                        $match = false;
                        break;
                    } else {
                        $temp['current'] = intval($s[$i]);
                    }
                }
            } else {
                if (isset($temp[$mode[$i]])) {
                    if ($s[$i] != $temp[$mode[$i]]) {
                        $match = false;
                        break;
                    }
                } else {
                    $temp[$mode[$i]] = $s[$i];
                }
            }
        }
        if ($match) {
            $result = $mode;
            break;
        }
    }
    return $result;
}
echo checkIt('13888888833');