新增DateTime工具类

Author: dongnan

src/linktool/DateTime.php

@@ -0,0 +1,119 @@
+<?php
+
+/**
+ * LinkTool - A useful library for PHP 
+ *
+ * @author      Dong Nan <[email protected]>
+ * @copyright   (c) Dong Nan http://idongnan.cn All rights reserved.
+ * @link        https://github.com/dongnan/LinkTool
+ * @license     BSD (http://opensource.org/licenses/BSD-3-Clause)
+ */
+
+namespace linktool;
+
+/**
+ * DateTime
+ * 用于处理日期、时间相关的方法
+ *
+ * @author Dong Nan <[email protected]>
+ * @date 2016-5-10
+ */
+class DateTime {
+
+    /**
+     * 获取标准的日期格式:yyyy-mm-dd
+     * 
+     * @param string $date
+     * @return string
+     */
+    public static function getStandardDate($date) {
+        $year = 0;
+        $month = 0;
+        $day = 0;
+        $match = preg_split('/[\D]0*/', trim($date));
+        if (empty($match)) {
+            return '0000-00-00';
+        }
+        $dateStr = '';
+        $matchLen = count($match);
+        for ($i = 0; $i < $matchLen; $i++) {
+            $dateStr .= $match[$i] < 10 ? '0' . $match[$i] : $match[$i];
+        }
+        $len = strlen($dateStr);
+        if ($len <= 4) {
+            $year = intval($dateStr);
+        } else {
+            $year = intval(substr($dateStr, 0, 4));
+            if ($len === 5) {
+                $month = intval(substr($dateStr, 4, 1));
+            } else if ($len === 6 || $len === 7) {
+                if (intval(substr($dateStr, 4, 2)) <= 12) {
+                    $month = intval(substr($dateStr, 4, 2));
+                    $day = intval(substr($dateStr, 6, $len - 6));
+                } else {
+                    $month = intval(substr($dateStr, 4, 1));
+                    $day = intval(substr($dateStr, 5, $len - 5));
+                }
+            } else {
+                $year = intval(substr($dateStr, 0, 4));
+                $month = intval(substr($dateStr, 4, 2));
+                $day = intval(substr($dateStr, 6, 2));
+            }
+        }
+        switch ($month) {
+            case 1:
+            case 3:
+            case 5:
+            case 7:
+            case 8:
+            case 10:
+            case 12:
+                $day > 31 && ($day = 0);
+                break;
+            case 4:
+            case 6:
+            case 9:
+            case 11:
+                $day > 30 && ($day = 0);
+                break;
+            case 2:
+                if (($year % 4 === 0 && $year % 100 !== 0) || $year % 400 === 0) {
+                    $day > 29 && ($day = 0);
+                } else {
+                    $day > 28 && ($day = 0);
+                }
+                break;
+            default:
+                $month = 0;
+                $day = 0;
+                break;
+        }
+
+        return sprintf('%04d-%02d-%02d', $year, $month, $day);
+    }
+
+    /**
+     * 获取时间戳
+     *
+     * @param string $datetime YYYY-MM-DD hh:mm:ss 或 YYYY-MM-DD
+     * @return int 
+     */
+    public static function getUnixTime($datetime) {
+        if (!preg_match('/[^0-9]/', $datetime)) {
+            return $datetime;
+        }
+        list($y, $m, $d, $h, $i, $s) = explode(' ', preg_replace('/\D+/i', ' ', $datetime));
+        return mktime($h, $i, $s, $m, $d, $y);
+    }
+
+    /**
+     * 获取简短的日期显示
+     * 
+     * @param string $date
+     * @return string
+     */
+    public static function getShortDate($date) {
+        return preg_replace('/0000-\d*-\d*|0000-00-\d*|-00-00|-00$/', '', preg_replace('/-|\/|\./', '-', $date));
+    }
+
+}