feat: add php solutions to lc problems: No.0876,1290 (#893)

* No.0876.Middle of the Linked List
* No.1290.Convert Binary Number in a Linked List to Integer

Author: Qiu-IT

solution/0800-0899/0876.Middle of the Linked List/README.md

@@ -223,6 +223,43 @@ struct ListNode *middleNode(struct ListNode *head) {
 }
 ```
 
+### **PHP**
+
+```php
+/**
+ * Definition for a singly-linked list.
+ * class ListNode {
+ *     public $val = 0;
+ *     public $next = null;
+ *     function __construct($val = 0, $next = null) {
+ *         $this->val = $val;
+ *         $this->next = $next;
+ *     }
+ * }
+ */
+class Solution {
+
+    /**
+     * @param ListNode $head
+     * @return ListNode
+     */
+    function middleNode($head) {
+        $count = 0;
+        $tmpHead = $head;
+        while ($tmpHead != null) {
+            $tmpHead = $tmpHead->next;
+            $count++;
+        }
+        $len = $count - floor($count / 2);
+        while ($count != $len) {
+            $head = $head->next;
+            $count--;
+        }
+        return $head;
+    }
+}
+```
+
 ### **...**
 
 ```

solution/0800-0899/0876.Middle of the Linked List/README_EN.md

@@ -204,6 +204,42 @@ struct ListNode *middleNode(struct ListNode *head) {
 }
 ```
 
+### **PHP**
+
+```php
+/**
+ * Definition for a singly-linked list.
+ * class ListNode {
+ *     public $val = 0;
+ *     public $next = null;
+ *     function __construct($val = 0, $next = null) {
+ *         $this->val = $val;
+ *         $this->next = $next;
+ *     }
+ * }
+ */
+class Solution {
+    /**
+     * @param ListNode $head
+     * @return ListNode
+     */
+    function middleNode($head) {
+        $count = 0;
+        $tmpHead = $head;
+        while ($tmpHead != null) {
+            $tmpHead = $tmpHead->next;
+            $count++;
+        }
+        $len = $count - floor($count / 2);
+        while ($count != $len) {
+            $head = $head->next;
+            $count--;
+        }
+        return $head;
+    }
+}
+```
+
 ### **...**
 
 ```

solution/0800-0899/0876.Middle of the Linked List/Solution.php

@@ -0,0 +1,31 @@
+/**
+ * Definition for a singly-linked list.
+ * class ListNode {
+ *     public $val = 0;
+ *     public $next = null;
+ *     function __construct($val = 0, $next = null) {
+ *         $this->val = $val;
+ *         $this->next = $next;
+ *     }
+ * }
+ */
+class Solution {
+    /**
+     * @param ListNode $head
+     * @return ListNode
+     */
+    function middleNode($head) {
+        $count = 0;
+        $tmpHead = $head;
+        while ($tmpHead != null) {
+            $tmpHead = $tmpHead->next;
+            $count++;
+        }
+        $len = $count - floor($count / 2);
+        while ($count != $len) {
+            $head = $head->next;
+            $count--;
+        }
+        return $head;
+    }
+}

solution/1200-1299/1290.Convert Binary Number in a Linked List to Integer/README.md

@@ -259,6 +259,38 @@ int getDecimalValue(struct ListNode *head) {
 }
 ```
 
+### **PHP**
+
+```PHP
+/**
+ * Definition for a singly-linked list.
+ * class ListNode {
+ *     public $val = 0;
+ *     public $next = null;
+ *     function __construct($val = 0, $next = null) {
+ *         $this->val = $val;
+ *         $this->next = $next;
+ *     }
+ * }
+ */
+class Solution {
+
+    /**
+     * @param ListNode $head
+     * @return Integer
+     */
+    function getDecimalValue($head) {
+        $rs = array();
+        while ($head != null) {
+            array_push($rs, $head->val);
+            $head = $head->next;
+        }
+        $rsStr = implode($rs);
+        return bindec($rsStr);
+    }
+}
+```
+
 ### **...**
 
 ```

solution/1200-1299/1290.Convert Binary Number in a Linked List to Integer/README_EN.md

@@ -225,6 +225,38 @@ int getDecimalValue(struct ListNode *head) {
 }
 ```
 
+### **PHP**
+
+```PHP
+/**
+ * Definition for a singly-linked list.
+ * class ListNode {
+ *     public $val = 0;
+ *     public $next = null;
+ *     function __construct($val = 0, $next = null) {
+ *         $this->val = $val;
+ *         $this->next = $next;
+ *     }
+ * }
+ */
+class Solution {
+
+    /**
+     * @param ListNode $head
+     * @return Integer
+     */
+    function getDecimalValue($head) {
+        $rs = array();
+        while ($head != null) {
+            array_push($rs, $head->val);
+            $head = $head->next;
+        }
+        $rsStr = implode($rs);
+        return bindec($rsStr);
+    }
+}
+```
+
 ### **...**
 
 ```

solution/1200-1299/1290.Convert Binary Number in a Linked List to Integer/Solution.php

@@ -0,0 +1,27 @@
+/**
+ * Definition for a singly-linked list.
+ * class ListNode {
+ *     public $val = 0;
+ *     public $next = null;
+ *     function __construct($val = 0, $next = null) {
+ *         $this->val = $val;
+ *         $this->next = $next;
+ *     }
+ * }
+ */
+class Solution {
+
+    /**
+     * @param ListNode $head
+     * @return Integer
+     */
+    function getDecimalValue($head) {
+        $rs = array();
+        while ($head != null) {
+            array_push($rs, $head->val);
+            $head = $head->next;
+        }
+        $rsStr = implode($rs);
+        return bindec($rsStr);
+    }
+}