is_writable() definition: The
function determines whether the specified file is writable.
Syntax:
is_writable($filename);
Parameter list:
| Parameter | Description |
|---|---|
| filename | Required. Specifies the documents to be checked. |
Example:
<code><span><span>class</span><span>test</span>{</span><span>public</span><span><span>function</span><span>hello</span><span>(<span>$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>
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The above introduces the php is_writable function, including the relevant content. I hope it will be helpful to friends who are interested in PHP tutorials.
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