[請益] include 的路徑順序
先說明檔案結構跟程式碼:
┬ a (目錄)
│├ a.php
│├ b.php
│└ c.php
├ c.php
└ s.php
s.php
<?php
include(a/a.php);
?>
c.php
<?php
echo '<div>this is c.php</div>';
?>
a/a.php
<?php
include('b.php');
include('c.php');
echo '<div>this is a/a.php</div>';
?>
a/b.php
<?php
echo '<div>this is a/b.php</div>';
?>
a/c.php
<?php
echo '<div>this is a/c.php</div>';
?>
接下來一樣是執行 s.php
狀況 1: c.php 存在，會產生這樣的結果:
this is a/b.php
this is c.php
this is a/a.php
狀況 2: c.php 不存在，會產生這樣的結果:
this is a/b.php
this is a/c.php
this is a/a.php
狀況 3: c.php 存在，把 a/a.php 改成
<?php
include('./b.php');
include('./c.php');
echo '<div>this is a/a.php</div>';
?>
會出現以下的結果:
xxxx
xxxx ←前兩行是找不到 b.php 的 warning 訊息
this is c.php
this is a/a.php
如果要用相對路徑，想請問 include 的路徑是怎麼判定的？
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