php is_writable函數

<code><span><span>class</span><span>test</span>{</span><span>public</span><span><span>function</span><span>hello</span><span>(<span>$filename</span>)</span>{</span><span>if</span>(is_writable(<span>$filename</span>)){
             <span>echo</span><span>"$filename is writeable"</span>;
         }<span>else</span>{
             <span>echo</span><span>"$filename is not writeable"</span>; 
         }
     }
 }

<span>$T</span>=<span>new</span> test();
<span>$T</span>->hello(<span>"F:file.txt"</span>);</code>

<code>  输出结果：

   F:<span>file</span>.txt <span>is</span> writeable </code>