在学习中会经常遇到文件系统,本文将将讲解php文件系统的操作。
<?php readfile("/home/paul/text.txt"); $filename = 'NoAlike.txt'; $filestring = file_get_contents($filename); echo $filestring; // fopen\fread\fclose操作读取文件 $fp = fopen('NoAlike.txt', "r");//r、r+、w、w+ $contents = fread($fp, 1024); fclose($fp); var_dump($fp); $date = "在PHP中文网学好PHP,妹子票子不在话下!"; $numbyte = file_put_contents('binggege.txt', $data); if ($numbyte) { echo '写入成功,我们读取看看结果试试:'; echo file_get_contents('binggege.txt'); }else{ echo '写入失败或者没有权限,注意检查'; } // fwrite配合fopen进行写入操作 $filename = 'test.txt'; $fp = fopen($filename, "r+");//x、a $len = fwrite($fp, '我是一只来自南方的狼,一直在'); //创建临时文件 $handle = tmpfile(); $numbytes = fwrite($handle, '写入临时文件'); fclose($handle); echo '向临时文件中写入了'.$numbytes.'个字节'; //移动、拷贝和删除文件 rename($oldname, $newname); $filename = 'test.txt'; $filename2 = $filename.'old'; rename($oldname, $oldname2); copy($oldname, $oldname2); if (unlink($filename)) { echo "删除文件成功$filename!\n"; }else { echo "sc $filename失败!\n"; } //检测文件属性函数 file_exists($filename);//文件是否存在 is_readable($filename);//文件是否可读 is_writable($filename);//文件是否可写 is_executable($filename);//文件是否可执行 is_file($filename);//是否是文件 is_dir($filename);//是否是目录 clearstatcache();//清楚文件的状态缓存 if (file_exists('install.lock')) { echo '已安装,请不要再次安装'; exit; } //文件常用函数和常量 $_current_file = str_replace( array('/','\\'), DIRECTORY_SEPARATOR, __FILE___); define('_CUR_FILE_', $_current_file); echo _CUR_FILE_; rewind($handle);//指针回到开始处 fseek($handle, $offset);//文件指针向后移动指定字符 $fp = fopen('demo2.txt', 'r+'); echo fread($fp, 10); rewind($fp); echo '<br>'; echo fread($fp, 10); echo '<br>'; echo fseek($fp, 10); echo '<br>'; echo fread($fp, 10); echo '<br>'; fclose($fp); $filename = 'demo.txt'; echo $filename . '文件大小为:'. filesize($filename).'bytes'; filectime($filename);//文件创建时间 filemtime($filename);//文件修改时间 fileatime($filename);//文件上次访问时间 $filename = 'demo.txt'; if (file_exists($filename)) { echo '$filename文件的上次访问时间是:'.date("Y-m-d H:i:s" ,filectime($filename)); echo '$filename文件的上创建时间是:'.date("Y-m-d H:i:s" ,filectime($filename)); echo '$filename文件的上次修改时间是:'.date("Y-m-d H:i:s" ,filemtime($filename)); } //文件锁处理机制 $fp = fopen("demo.txt", "r+"); if (flock($fp, LOCK_EX)) { fwrite($fp, "文件这个时候被我占用了哟\n"); flock($fp, LOCK_UN); }else { echo "锁失败,可能有人在操作,这个时候不能将文件上锁"; } fclose($fp); //目录处理函数 $dir = "d:/"; if (is_dir($dir)) { if ($dh = opendir($dir)) { echo readdir($dh).'<br />'; echo readdir($dh).'<br />'; echo readdir($dh).'<br />'; echo readdir($dh).'<br />'; closedir($dh); }; } $dir = "d:/"; if (is_dir($dir)) { if ($dh = opendir($dir)) { while (($file = readdir($dh)) !== false){ echo "文件名为:$file : 文件的类型是:".filetype($dir.$file).'<br />'; } closedir($dh); } } //文件权限设置 chmod("/var/wwwroot/index.html", 755); chmod("/var/wwwroot/index.html", "u+rwx,go+rx"); chmod("/somedir/somefile", 0755); //文件路径函数 pathinfo($path);//返回文件的各个组成部分 basename($path);//返回文件名 dirname($path);//文件目录部分 parse_url($url);//网址拆解成各部分 http_build_query($query_data);//生成url中的query字符串 http_build_url();//生成一个url $date = [ 'username'=>'php', 'area'=>'hubei' ]; echo http_build_query($date); $path_parts = pathinfo('d:/www/index.inc.php'); echo '文件目录名:'.$path_parts['dirname']."<br />"; echo '文件全名:'.$path_parts['basename']."<br />"; echo '文件扩展名:'.$path_parts['extension']."<br />"; echo '不包含扩展的文件名:'.$path_parts['filename']."<br />"; echo "1: ".basename("d:/www/index.d",".d").PHP_EOL; echo "2: ".basename("d:/www/index.php").PHP_EOL; echo "3: ".basename("d:/www/passwd").PHP_EOL; $url = 'https://username:password@hostname:9090/path?arg=value#anchor'; var_dump(parse_url($url)); //文件留言本 // date_default_timezone_set('PRC'); @$string = file_get_contents('message.txt'); if (!empty($string)) { $string = rtrim($string, '&^'); $arr = explode('&^', $string); foreach ($arr as $value){ list($username, $content, $time) = explode('$#', $value); echo '用户名为<font color="gree">'.$username.'</font>'; echo '<hr />'; } } $fp=fopen('message.txt', 'a'); $time=time(); $username=trim(@$_POST['username']); $content=trim(@$_POST['content']); if ($username & $content) { $string=$username.'$#'.$content.'$#'.$time.'&^'; fwrite($fp, $string); fclose($fp); } ?> <h1 id="基于文本的留言本演示">基于文本的留言本演示</h1> <form action="write.php" method="post"> 用户名:<input type="text" name="username" /><br /> 留言内容:<textarea name="content"></textarea><br /> <input type="submit" value="提交" /> </form> <!-- 实现修改配置文件的实例 --> <?php include 'config.php'; ?> <form action="edit.php" method="post"> <input type="text" name="DB_HOST" value="<?php echo DB_HOST;?>" /><br /> <input type="text" name="DB_USER" value="<?php echo DB_USER;?>" /><br /> <input type="text" name="DB_PWD" value="<?php echo DB_PWD;?>" /><br /> <input type="text" name="DB_NAME" value="<?php echo DB_NAME;?>" /><br /> <input type="submit" value="修改" /> </form> <!-- edit.php --> <?php $string=file_get_contents('config.php'); foreach ($_POST as $key=>$val){ $yx="/define′$key′,′.∗?′′$key′,′.∗?′;/"; $re="define('$key','$val');"; $string=preg_replace($yx, $re, $string); } file_put_contents('config.php', $string); echo '修改成功'; ?> <!-- config.php --> <?php define('DB_HOST', 'localhost1'); define('DB_USER', 'root1'); define('DB_PWD', 'root1'); define('DB_NAME', 'neirong1'); ?>
本文讲解了php文件系统的操作,更多相关知识请关注php中文网。
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