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php页面静态刷新
 
 
修改时间：[2008/07/21 19:56]    阅读次数：[909]    发表者：[起缘]
 
Requirements
Works with Apache-1.3.14/PHP4.0.3pl1 server and Various Netscape clients. Probably many other server combos. Tested on Netscape 4.7x and 6.0/Mozilla.
Does NOT WORK WITH IE. Internet Exploiter does not support x-mixed-replace server-push as far as I know. If a browser has "MSIE" in its User-Agent string the script will display one image and exit.

Update 20020108: Poked around freshmeat for a bit and found Andy Wilcock's Cambozola java applet which seems to work well with my php script to make the stream viewable under IE. Beware that the current version doesn't work under "Name-based" virtual hosts but I'll have a patch for it soon.
Source
Download

<?
$file = "./latest.jpg";
$sep = "gIrLsKiCkAsSiTsAySsOoNaTsHiRt";

if (ereg(".*MSIE.*",$HTTP_SERVER_VARS["HTTP_USER_AGENT"]))
{
# If IE, spit out one pic and exit
header("Cache-Control: no-cache");
header("Pragma: no-cache");
header("Content-type: image/jpeg");
header("Content-size: " . filesize($file));
readfile($file);
}
else
{
# if not IE, give the browser a try
header("Content-Type: multipart/x-mixed-replace; boundary=$sep");
print "--$sep\n";
do {
print "Content-Type: image/jpeg\n\n";
readfile($file);
print "\n--$sep\n";
flush();
$mt = filemtime($file);
do {
sleep (1);
# we won't output the same image twice.
clearstatcache();
} while ($mt == filemtime($file));
} while (1);
}
?>


Make sure there are no blank lines outside the <? ?> in your script. That will cause screwey headers to be sent too soon.
Reference the script in your HTML page as if it was an image:

<IMG SRC="server-push.php" HEIGHT=240 WIDTH=320>

Use this bit of PHP on the page that references the image to compensate for IE's lack of "innovation":

<HEAD>
<?
if (ereg("MSIE",$HTTP_SERVER_VARS["HTTP_USER_AGENT"])) {
echo "<META HTTP-EQUIV=\"Refresh\" CONTENT=\"4;\">\n";
}
?>
</HEAD>