在
判断文件存在的函数还有file_exists(下面演示),但是这个显然无is_readable全面.,当一个文件存在的话可以用
<ol class="dp-xml">
<li class="alt"><span><span class="tag"><span> ?php </span></span></span></li>
<li>
<span>$</span><span class="attribute">file</span><span> = </span><span class="attribute-value">"filelist.php"</span><span>; </span>
</li>
<li class="alt"><span>if (file_exists($file) == false) { </span></li>
<li><span>die('文件不存在'); </span></li>
<li class="alt"><span>} </span></li>
<li>
<span>$</span><span class="attribute">data</span><span> = </span><span class="attribute-value">file_get_contents</span><span>($file); </span>
</li>
<li class="alt"><span>echo htmlentities($data); </span></li>
<li>
<span class="tag">?></span><span> </span>
</li>
<li class="alt"><span> </span></li>
</ol>但是file_get_contents函数在较低版本上不支持,可以先创建文件的一个句柄,然后用指针读取全部:
$fso = fopen($cacheFile, 'r');
$data = fread($fso, filesize($cacheFile));
fclose($fso);
还有一种方式,可以读取二进制的文件:
$data = implode('', file($file));
