搞笑获取url的扩展名

getUrlExtensionName.php

@@ -0,0 +1,68 @@
+<?php
+/**
+ * Created by PhpStorm.
+ * User: chentao
+ * Date: 2019/3/13
+ * Time: 3:52 PM
+ */
+
+#写一个函数，尽可能高效的，从一个标准 url 里取出文件的扩展名
+#例如: http://www.sina.com.cn/abc/de/fg.php?id=1 需要取出 php 或 .php
+
+function getExtensionName($url)
+{
+    $arr = parse_url($url);
+    var_dump($arr);
+    /**
+     * array(4) {
+    'scheme' =>
+    string(4) "http"
+    'host' =>
+    string(15) "www.sina.com.cn"
+    'path' =>
+    string(14) "/abc/de/fg.php"
+    'query' =>
+    string(4) "id=1"
+    }
+
+     */
+    $pathArr = pathinfo($arr['path']);
+    var_dump($pathArr);
+    /**
+     * array(4) {
+    'dirname' =>
+    string(7) "/abc/de"
+    'basename' =>
+    string(6) "fg.php"
+    'extension' =>
+    string(3) "php"
+    'filename' =>
+    string(2) "fg"
+    }
+
+     */
+    echo '.',$pathArr['extension'],"\n";
+}
+
+function getExtensionName2($url)
+{
+    //取出扩展名及参数
+    $temp = pathinfo($url,PATHINFO_EXTENSION);//php?id=1
+    //找到扩展名
+    $temp = explode("?",$temp);
+     echo '.',$temp[0],"\n";
+}
+
+function getExtensionName3($url)
+{
+    //取出扩展名及参数
+    $temp = pathinfo($url,PATHINFO_BASENAME); //fg.php?id=1
+    var_dump($temp);
+    //找到扩展名
+    $temp = explode("。",$temp);
+    echo $temp[0],"\n";
+}
+
+//$url = "http://www.sina.com.cn/abc/de/fg.php?id=1";
+$url = "/Users/chentao/Documents/work/interview/codehero2/codehero-2.html";
+getExtensionName($url);

phpinfo.php

@@ -4,4 +4,5 @@
  * User: chentao
  * Date: 2019/1/26
  * Time: 4:31 PM
- */
+ */
+phpinfo();