is_file() 函数检查指定的文件名是否是正常的文件。 is_file — Tells whether the filename is a regular file 用法 bool is_file ( string $filename ) $file 为必选参数 如果文件存在且为正常的文件则返回 TRUE。 来看一个测试is_file经典实例 <div class="codetitle"><a style="CURSOR: pointer" data="72033" class="copybut" id="copybut72033" onclick="doCopy('code72033')"> 代码如下:<div class="codebody" id="code72033"> <?php var_dump(is_file('a_file.txt')) . "n"; var_dump(is_file('/usr/bin/')) . "n"; ?> 上例将输出: bool(true) bool(false) 用法二 <div class="codetitle"><a style="CURSOR: pointer" data="63747" class="copybut" id="copybut63747" onclick="doCopy('code63747')"> 代码如下:<div class="codebody" id="code63747"> <?php function isfile($file){ return preg_match('/^[^.^:^?^-][^:^?]*.(?i)' . getexts() . '$/',$file); //first character cannot be . : ? - subsequent characters can't be a : ? //then a . character and must end with one of your extentions //getexts() can be replaced with your extentions pattern } function getexts(){ //list acceptable file extensions here return '(app|avi|doc|docx|exe|ico|mid|midi|mov|mp3| mpg|mpeg|pdf|psd|qt|ra|ram|rm|rtf|txt|wav|word|xls)'; } echo isfile('/Users/YourUserName/Sites/index.html'); ?> 实例三 <div class="codetitle"><a style="CURSOR: pointer" data="41721" class="copybut" id="copybut41721" onclick="doCopy('code41721')"> 代码如下:<div class="codebody" id="code41721"> <?php function deletefolder($path) { if ($handle=opendir($path)) { while (false!==($file=readdir($handle))) { if ($file<>"." AND $file<>"..") { if (is_file($path.'/'.$file)) { @unlink($path.'/'.$file); } if (is_dir($path.'/'.$file)) { deletefolder($path.'/'.$file); @rmdir($path.'/'.$file); } } } } } ?> 此函数删除所有事情,定义的文件夹 (编辑:李大同)
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