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php最简单的文件处理。

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Jun 20, 2016 pm 12:41 PM

 1 <?php  2    $DOCUMENT_ROOT =$_SERVER['DOCUMENT_ROOT']; 3 ?> 4  5 <html> 6 <head> 7    <title>Bob's Auto Parts -Customer Orders </title> 8 </head> 9 <body>10 <h1 id="Bob-s-Auto-Parts">Bob's Auto Parts</h1>11 <h2 id="Customer-Orders">Customer Orders</h2>12 13 <?php14   /*15   $a=56;16  if(!is_double ($a))    //测试is_int、is_double 、函数17      echo "<p><strong>isn't double</strong ></p>";18  echo gettype($a).'<br/>';19  settype($a,'double');20  echo gettype($a).'<br/>';21  */22  23   @$fp =fopen("$DOCUMENT_ROOT/orders/orders.txt",'rb');24   if (!$fp){25   echo"<p><strong>No orders pending.26        please try again later.</strong></p>";27   exit ;28   }29 30   /*31   isset ();32   33   empty()34   35   */36   //读取每行37   while (!feof($fp)){38       $order = fgets($fp,1024); //fgets()每次读取一行，遇到\n 、eof 、或者是998b结束。默认1k=1024b39       echo $order."<br/>";     //fgetss() 和fgets()一样的功能，但是能过滤掉包含php和html的标记40      }                         //fgetss(resource fp,int length,string[allowable_tags]) 把不过滤的标记放在allowable_tags中41                                //$order = fgetss($fp,999,"<p>,<br/>");42                                //  fgetcsv($fp,1024,"\t")  意思是遇到换行43                                44 /*45 读取整个文件，46 readfile("$DOCUMENT_ROOT/orders/orders.txt");47 fpassthru($fp) ； //fp是一个指针48 $filearray =file("$DOCUMENT_ROOT/orders/orders.txt") 49 //功能和readfile一样，但是每一行是字符串数组的一个元素50 */    51 52 /*53 通过字符来输出整个文件54 while(!feof($fp))55     $char =fgetc($fp);56   if(!feof($fp))57       echo ($char =="\n"?<br/>:$char);                           58 */                               59 // fread($fp,int length)  读取任意长度，或者到eof    60 61 /*62 file_exists("$DOCUMENT_ROOT/orders/orders.txt");63 filesize();64 unlink("$DOCUMENT_ROOT/orders/orders.txt")  //删除一个文件65 66 rewind($fp); //重新跳到开始指针67 fseek ($fp);  //找到位置  字节数68 ftell ($fp);  //显示出位置69 70 71 */               72                                73 ?>74 </body>

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