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PHPÓкܶà»úÖÆ¡¢º¯Êý£¬Æäʵ¾ÍÊÇħÊõʦ£¬Öظ´·¢»ÓºÃ£¬ÆäʵÉõÖÁÊǼòµ¥Ó¦Ó㬾ͻá³öÏÖÉñÆæµÄЧ¹û¡£ÕâÀï½²Ò»¸öob_start()º¯Êý¡£
ob_start()º¯ÊýÓÃÓÚ´ò¿ª»º³åÇø,±ÈÈçheader()º¯ÊýÖ®
ǰÈç¹û¾ÍÓÐÊä³ö,°üÀ¨»Ø³µ\¿Õ¸ñ\»»ÐÐ\¶¼»áÓДHeader had all ready send
by”µÄ´íÎó,Õâʱ¿ÉÒÔÏÈÓÃob_start()´ò¿ª»º³åÇøPHP´úÂëµÄÊý¾Ý¿éºÍecho()Êä³ö¶¼»á½øÈ뻺³åÇø¶ø²»»áÁ¢¿ÌÊä³ö.µ±È»´ò¿ª»º³åÇøµÄ×÷ÓúÜ
¶à,Ö»Òª·¢»ÓÄãµÄÏëÏó.¿ÉÒÔ×ܽáÒÔÏÂËĵã:
1.ÓÃÓÚheader()֮ǰ
ob_start(); //´ò¿ª»º³åÇø
echo \”Hellon\”; //Êä³ö
header(”location:index.php”); //°Ñä¯ÀÀÆ÷ÖØ¶¨Ïòµ½index.php
ob_end_flush();//Êä³öÈ«²¿ÄÚÈݵ½ä¯ÀÀÆ÷
?>
2.phpinfo()º¯Êý¿É»ñÈ¡¿Í»§¶ËºÍ·þÎñÆ÷¶ËµÄÐÅÏ¢,µ«Òª±£´æ¿Í»§¶ËÐÅÏ¢Óûº³åÇøµÄ·½·¨ÊÇ×îºÃµÄÑ¡Ôñ.
ob_start(); //´ò¿ª»º³åÇø
phpinfo(); //ʹÓÃphpinfoº¯Êý
$info=ob_get_contents(); //µÃµ½»º³åÇøµÄÄÚÈݲ¢ÇÒ¸³Öµ¸ø$info
$file=fopen(\’info.txt\’,\’w\’); //´ò¿ªÎļþinfo.txt
fwrite($file,$info); //дÈëÐÅÏ¢µ½info.txt
fclose($file); //¹Ø±ÕÎļþinfo.txt
?>
3.¾²Ì¬Ò³Ãæ¼¼Êõ
ob_start();//´ò¿ª»º³åÇø
?>
phpÒ³ÃæµÄÈ«²¿Êä³ö
$content = ob_get_contents();//È¡µÃphpÒ³ÃæÊä³öµÄÈ«²¿ÄÚÈÝ
$fp = fopen(”output00001.html”, “w”); //´´½¨Ò»¸öÎļþ£¬²¢´ò¿ª£¬×¼±¸Ð´Èë
fwrite($fp, $content); //°ÑphpÒ³ÃæµÄÄÚÈÝÈ«²¿Ð´Èëoutput00001.html£¬È»ºó……
fclose($fp);
?>
4.Êä³ö´úÂë
Function run_code($code) {
If($code) {
ob_start();
eval($code);
$contents = ob_get_contents();
ob_end_clean();
}else {
echo “´íÎó£¡Ã»ÓÐÊä³ö”;
exit();
}
return $contents;
}
Output Control
º¯Êý¿ÉÒÔÈÃÄã×ÔÓÉ¿ØÖƽű¾ÖÐÊý¾ÝµÄÊä³ö¡£Ëü·Ç³£µØÓÐÓã¬ÌرðÊǶÔÓÚ£ºµ±ÄãÏëÔÚÊý¾ÝÒѾ­Êä³öºó£¬ÔÙÊä³öÎļþÍ·µÄÇé¿ö¡£Êä³ö¿ØÖƺ¯Êý²»¶ÔʹÓÃ
header() »ò setcookie(), ·¢Ë͵ÄÎļþÍ·ÐÅÏ¢²úÉúÓ°Ïì,Ö»¶ÔÄÇЩÀàËÆÓÚ echo() ºÍ PHP ´úÂëµÄÊý¾Ý¿éÓÐ×÷Óá£
ÎÒÃÇÏȾÙÒ»¸ö¼òµ¥µÄÀý×Ó£¬Èôó¼Ò¶ÔOutput ControlÓÐÒ»¸ö´óÖµÄÓ¡Ïó£º
Example 1.
CODE<?php
ob_start(); //´ò¿ª»º³åÇø
echo \”Hellon\”; //Êä³ö
header(”location:index.php”); //°Ñä¯ÀÀÆ÷ÖØ¶¨Ïòµ½index.php
ob_end_flush(


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