feat: add php solution to lc problem: No.1507 (doocs#1023)

Author: Qiu-IT

solution/1500-1599/1507.Reformat Date/README.md

@@ -123,6 +123,26 @@ func reformatDate(date string) string {
 }
 ```
 
+### **PHP**
+
+```php
+class Solution {
+    /**
+     * @param String $date
+     * @return String
+     */
+    function reformatDate($date) {
+        $arr = explode(" ", $date);
+        $months = array("Jan" => "01", "Feb" => "02", "Mar" => "03", "Apr" => "04", "May" => "05", "Jun" => "06", "Jul" => "07", "Aug" => "08", "Sep" => "09", "Oct" => "10", "Nov" => "11", "Dec" => "12");
+        $year = $arr[2];
+        $month = $months[$arr[1]];
+        $day = intval($arr[0]);
+        if ($day > 0 && $day < 10) $day = "0".$day;
+        return $year."-".$month."-".$day;
+    }
+}
+```
+
 ### **...**
 
 ```

solution/1500-1599/1507.Reformat Date/README_EN.md

@@ -110,6 +110,26 @@ func reformatDate(date string) string {
 }
 ```
 
+### **PHP**
+
+```php
+class Solution {
+    /**
+     * @param String $date
+     * @return String
+     */
+    function reformatDate($date) {
+        $arr = explode(" ", $date);
+        $months = array("Jan" => "01", "Feb" => "02", "Mar" => "03", "Apr" => "04", "May" => "05", "Jun" => "06", "Jul" => "07", "Aug" => "08", "Sep" => "09", "Oct" => "10", "Nov" => "11", "Dec" => "12");
+        $year = $arr[2];
+        $month = $months[$arr[1]];
+        $day = intval($arr[0]);
+        if ($day > 0 && $day < 10) $day = "0".$day;
+        return $year."-".$month."-".$day;
+    }
+}
+```
+
 ### **...**
 
 ```

solution/1500-1599/1507.Reformat Date/Solution.php

@@ -0,0 +1,15 @@
+class Solution {
+    /**
+     * @param String $date
+     * @return String
+     */
+    function reformatDate($date) {
+        $arr = explode(" ", $date);
+        $months = array("Jan" => "01", "Feb" => "02", "Mar" => "03", "Apr" => "04", "May" => "05", "Jun" => "06", "Jul" => "07", "Aug" => "08", "Sep" => "09", "Oct" => "10", "Nov" => "11", "Dec" => "12");
+        $year = $arr[2];
+        $month = $months[$arr[1]];
+        $day = intval($arr[0]);
+        if ($day > 0 && $day < 10) $day = "0".$day;
+        return $year."-".$month."-".$day;
+    }
+}