输出缓冲区函数有:
ob_start() - 打开输出控制缓冲
() - 返回输出缓冲区的长度
() - 返回输出缓冲区的嵌套级别
() - 返回输出缓冲区的状态(数组形式返回,默认返回最顶层,参数为true时返回所有)
() - 返回输出缓冲区的内容
() - 以字符串格式返回当前输出缓冲区并关闭输出缓冲
ob_end_clean() - 清空(擦除)缓冲区并关闭输出缓冲
ob_get_flush() - 以字符串返回输出缓冲区内容并关闭缓冲
() - 冲刷出(送出)输出缓冲区内容缓冲
实例如下:
<?php  
 define('APP_ROOT', dirname(FILE));
 $file = '/templates/html/error_config.html';
 ob_start(); 
 include(APP_ROOT.$file);
 ob_end_flush();
   //$contents = ob_get_contents();  这样可以将输出保存,可以作进一步处理
  //ob_end_clean();
   //echo $contents;
 ?><?php echo"<?xml version="1.0" encoding="utf-8">"; ?>
 <!DOCTYPE html PUBLIC "-//W3C//DTD  XHTML 1.0  Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 <html xmlns="http://www.w3.org/1999/xhtml">
 <head>
     <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
     <meta http-equiv="Content-Script-Type" content="text/javascript" />
     <meta http-equiv="Content-Style-Type" content="text/css" />
     <title>Error</title>
 </head>
 <body onload="doRedirect()">
 <h1>Error</h1>
 <p style="position:absolute;top:150px;text-align:center;width:95%;">
     <p style="margin:12pt;"><strong>config.php</strong> does not exist or is not readable by the webserver in the directory.</p>
     <p style="margin:12pt;"><?php echo CommonFunctions::$PSI_VERSION_STRING ?></p>
 </p>
 </body>
 </html>输出结果如下:
config.php does not exist or is not readable by the webserver in the phpsysinfo directory.
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