PHP网页进度条
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<?phpif ('source' == $_GET['act']) //查看源代码{ show_source($_SERVER["SCRIPT_FILENAME"]); exit;}set_time_limit(0);for ($i = 0; $i < 500; $i++){ $users[] = 'Tom_' . $i;}$width = 500; //显示的进度条长度，单位 px$total = count($users); //总共需要操作的记录数$pix = $width / $total; //每条记录的操作所占的进度条单位长度$progress = 0; //当前进度条长度?><html><head><title>动态显示服务器运行程序的进度条</title><meta http-equiv="Content-Type" content="text/html; charset=gb2312" /><meta name="Generator" content="JEdit"><meta name="Author" content="Krazy Nio">
<style>
body, div input { font-family: Tahoma; font-size: 9pt }</style>
<script language="JavaScript">
<!--function updateProgress(sMsg, iWidth)
{ document.getElementById("status").innerHTML = sMsg; document.getElementById("progress").style.width = iWidth + "px"; document.getElementById("percent").innerHTML = parseInt(iWidth / <?php echo $width; ?> * 100) + "%";
}
//--></script> </head><body><div style="margin: 4px; padding: 8px; border: 1px solid gray; background: #EAEAEA; width: <?php echo $width+8; ?>px"> <div><font color="gray">如下进度条的动态效果由服务器端 PHP 程序结合客户端 JavaScript 程序生成。</font></div> <div style="padding: 0; background-color: white; border: 1px solid navy; width: <?php echo $width; ?>px"> <div id="progress" style="padding: 0; background-color: #FFCC66; border: 0; width: 0px; text-align: center; height: 16px"></div> </div> <div id="status"> </div> <div id="percent" style="position: relative; top: -30px; text-align: center; font-weight: bold; font-size: 8pt">0%</div></div><?phpflush(); //将输出发送给客户端浏览器foreach ($users as $user)//在此处使用空循环模拟较为耗时的操作，实际应用中需将其替换；若你的操作不耗时，我想你就没必要使用这个脚本了){ for ($i = 0; $i < 10000; $i++) { ;;}?>
<script language="JavaScript">
updateProgress("正在操作用户“<?php echo $user; ?>” 
.", <?php echo min($width, intval($progress)); ?>);</script><?phpflush(); //将输出发送给客户端浏览器，使其可以立即执行服务器端输出的 JavaScript 程序。$progress += $pix; } //end foreach// 最后将进度条设置成最大值 $width，同时显示操作完成?>
<script language="JavaScript">
updateProgress("操作完成！", <?php echo $width; ?>);</script><?phpflush();?><input type="button" value="查看源码" onclick="document.location.href='<?php echo $_SERVER['PHP_SELF']; ?>?act=source'" /></body></html>
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<div id=load_stat>进度显示</div>
<script type=text/javascript>
var need_load=10;//部件里面使用onload的数量
var load_ok=0;
function show_loading(){
var e=document.getElementById('load_stat');
if (load_ok<need_load){
e.innerHTML='共有'+need_load+'个需要装载，已经装载了'+load_ok+'个，完成'+Math.round(load_ok/need_load,2)+'％';
setTimeout("show_loading();",500);//过半秒显示进度
} else e.style.display='none';//关闭进度条
}
setTimeout("show_loading();",500);//过半秒显示进度
</script>
<img src='...' onload="load_ok++;">
<img src='...' onload="load_ok++;">
