HTML PHP 进度条

Question

我有一个使用 PHP 发送表单数据的表单的网站。 有没有办法在页面上创建一个看起来像是在运行的进度条，这样人们在点击按钮并发送 PHP 信息后不会多次点击按钮。

谢谢。

Answer 1

进度条：简单文本版本：

<?php
// Output a 'waiting message'
echo 'Please wait while this task completes';

// Now while waiting for a certain task to
// complete, keep outputting .'s

while (true) {
  // Echo an extra dot, and flush the buffers
  // to ensure it gets displayed.
  echo ' .';
  flush();

  // Now sleep for 1 second and check again:
  sleep(1);
}
?>

进度条：基于 PHP（图形）：

<?php
// A function that will create the initial setup
// for the progress bar: You can modify this to
// your liking for visual purposes:
function create_progress() {
  // First create our basic CSS that will control
  // the look of this bar:
  echo "
<style>
#text {
  position: absolute;
  top: 100px;
  left: 50%;
  margin: 0px 0px 0px -150px;
  font-size: 18px;
  text-align: center;
  width: 300px;
}
  #barbox_a {
  position: absolute;
  top: 130px;
  left: 50%;
  margin: 0px 0px 0px -160px;
  width: 304px;
  height: 24px;
  background-color: black;
}
.per {
  position: absolute;
  top: 130px;
  font-size: 18px;
  left: 50%;
  margin: 1px 0px 0px 150px;
  background-color: #FFFFFF;
}

.bar {
  position: absolute;
  top: 132px;
  left: 50%;
  margin: 0px 0px 0px -158px;
  width: 0px;
  height: 20px;
  background-color: #0099FF;
}

.blank {
  background-color: white;
  width: 300px;
}
</style>
";

  // Now output the basic, initial, XHTML that
  // will be overwritten later:
  echo "
<div id='text'>Script Progress</div>
<div id='barbox_a'></div>
<div class='bar blank'></div>
<div class='per'>0%</div>
";

  // Ensure that this gets to the screen
  // immediately:
  flush();
}

// A function that you can pass a percentage as
// a whole number and it will generate the
// appropriate new div's to overlay the
// current ones:

function update_progress($percent) {
  // First let's recreate the percent with
  // the new one:
  echo "<div class='per'>{$percent}
    %</div>\n";

  // Now, output a new 'bar', forcing its width
  // to 3 times the percent, since we have
  // defined the percent bar to be at
  // 300 pixels wide.
  echo "<div class='bar' style='width: ",
    $percent * 3, "px'></div>\n";

  // Now, again, force this to be
  // immediately displayed:
  flush();
}

// Ok, now to use this, first create the
// initial bar info:
create_progress();

// Now, let's simulate doing some various
// amounts of work, and updating the progress
// bar as we go. The usleep commands will
// simulate multiple lines of code
// being executed.
usleep(350000);
update_progress(7);
usleep(1550000);
update_progress(28);
usleep(1000000);
update_progress(48);
usleep(1000000);
update_progress(68);
usleep(150000);
update_progress(71);
usleep(150000);
update_progress(74);
usleep(150000);
update_progress(77);
usleep(1150000);
update_progress(100);

// Now that you are done, you could also
// choose to output whatever final text that
// you might wish to, and/or to redirect
// the user to another page.
?>

Answer 2

Web 内容上的进度条很难正确设置，因为您不知道该过程将花费的总时间，并且您没有来自该过程的进度指示器来让您知道何时更新您的进度条。 使用ajaxload.com 上提供的旋转加载图像可能会更好。

您可以使隐藏的 div 覆盖整个页面，并在等待时激活 javascript 中的 div。

在你的 html 中：

<div style="display:none;" id="wait"></div>

在CSS中：

#wait {
   position:fixed;
   top:50%;
   left:50%;
   background-color:#dbf4f7;
   background-image:url('/images/wait.gif'); // path to your wait image
   background-repeat:no-repeat;
   z-index:100; // so this shows over the rest of your content

   /* alpha settings for browsers */
   opacity: 0.9;
   filter: alpha(opacity=90);
   -moz-opacity: 0.9;
}

然后在你的 JavaScript 中：

...
$("#wait").show(); // when you want to show the wait image
...
$("#wait").hide(); // when your process is done or don't worry about it if the page is refreshing

Answer 3

您需要使用 Javascript，我建议您查看JQuery 的 ProgressBar 。