PHP lookandsay示例

示例#1

文件： lookandsay.php 项目： haikentcode/code

<?php

function lookandsay($s)
{
    $pre = $s[0];
    $ret = "";
    $count = 1;
    for ($i = 1; $i < strlen($s); $i++) {
        if ($s[$i] == $pre) {
            $count++;
        } else {
            $ret .= $count . $pre;
            $pre = $s[$i];
            $count = 1;
        }
    }
    $ret .= $count . $pre;
    return $ret;
}
$s = 1;
for ($i = 1; $i < 20; $i++) {
    $s = lookandsay($s);
    print $s . "\n";
}

示例#2

文件： LookAndSay.php 项目： pombredanne/fuzzer-fat-fingers

<?php

function lookandsay($str)
{
    return preg_replace('/(.)\\1*/e', 'strlen($0) . $1', $str);
}
$num = "1";
foreach (range(1, 10) as $i) {
    echo "{$num}\n";
    $num = lookandsay($num);
}