目前日期文章:201402 (14)

瀏覽方式: 標題列表 簡短摘要
<?php
$content = "";
$fp = fopen("http://file-to-download.com/a-file.zip", "rb");

if (!$fp)
die("Error opening file.");
while (!feof($fp))
$content .= fread($fp, 2048);
fclose($fp);

$fp=fopen("local-file-name.zip", "w");
fwrite($fp, $content);
fclose($fp);
?>

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首先要講下 at 命令 是要用 /bin/bash shell 來執行的,
你可以在php裡查一下 apache 使用的是哪個 shell,
<?

$output = shell_exec('echo $SHELL');

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mysql_insert_id()


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通常
傳入參數是
function test(obj){
  a=obj.style.pixelLeft
  b=obj.style.pixelTop
}
*obj是網頁上的物件

但是
我認為比較好懂的方法是

function test(objID){
  var obj = document.getElementById(objID);
  a=obj.style.pixelLeft
  b=obj.style.pixelTop
}


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function httpGet(theUrl){var xmlHttp =null;

    xmlHttp =newXMLHttpRequest();
    xmlHttp.open("GET", theUrl,false);
    xmlHttp.send(null);return xmlHttp.responseText;}

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This is because images and tmp_file_upload are only writable by root user. For upload to work we need to make the owner of those folders same as httpd process owner OR make them globally writable (bad practice).

  1. Check apache process owner:  ps aux | grep httpd. The first column will be the owner typically it will be nobody
  2. Change the owner of images and tmp_file_upload to be become nobody or whatever the owner you found in step 1.

    $sudo chown nobody /var/www/html/mysite/images/

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上傳多個檔案

可以對 input 功能變數使用不同的 name 來上傳多個檔案。

PHP 支援同時上傳多個檔案並將它們的訊息自動以陣列的形式組織。要完成這項功能,需要在 HTML 表單中對檔案上傳功能變數使用和多選框與復選框相同的陣列式送出語法。

注: 對多檔案上傳的支援是在 PHP 3.0.10 版本增加的。

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首先說一下document對象的來歷。在瀏覽器訪問的任何一個頁面,都會在內存中以XML的形式存在一個副本,瀏覽器遵循一個內部算法將HTML轉成XML,這種XML,javascript可以直接訪問,重要的是,它可以被修改並立即在瀏覽器中實現。 
簡單的說DOM就是用來表示XML的元素,我們使用一個名為document來引用它,基於這個實例,我們可以查詢每個XML元素,即Element對象。

在WEB中,如果我們指定了某個元素的屬性「id=」,就可以使用Document對象的成員方法getElementByID()來檢索這個元素。

代碼=======================
<td>
 <IMG id ="2XSHZ" >
</td>
<script language="javascript" >
 var i = Math.random(); 
 document.getElementById("2XSHZ").src="2XSHZ.jpg?i="+i;
</script>

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  【實作 Server 端

所謂 Server-Sent Event 中文解釋為伺服器推送或伺服器推播,主要是用來將伺服器上的資料自動傳輸至 Client 端,使用的是 HTTP 通訊協定。首先需要 Server 端的應用程式,筆者以 ASP.NET 泛型處理常式來實作本文 Server 端的應用程式,您也可以利用 PHP、JSP 等其他 Server 端的程式語言來實作。

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$('body').css('background-image','url(../images/backgrounds/header-top.jpg)');

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一開始這樣寫,但出問題

function trim_dom_node($string){
$string=str_replace(" <","<",$string,$count);

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<?

header("Content-Type:text/xml");

echo "<

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In the early days of PHP programming, PHP code was limited to being procedural in nature. Procedural codeis characterized by the use of procedures for the building blocks of the application. Procedures offer a certain level of reuse by allowing procedures to be called by other procedures.

However, without object-oriented language constructs, a programmer can still introduce OO characteristics into PHP code. It's a tad more difficult and can make the code more difficult to read because it's mixing paradigms (procedural language with pseudo-OO design). OO constructs in PHP code — such as the ability to define and use classes, the ability to build relationships between classes that use inheritance, and the ability to define interfaces — make it much easier to build code that adheres to good OO practices.

While purely procedural designs without much modularity run just fine, the advantages of OO design show up in the maintenance. Because a typical application will spend the bulk of its lifetime in maintenance, code maintenance is a large expense over the lifetime of an application. It can also be easily forgotten during development. If you're in a race to get your application developed and deployed, long-term maintainability can take a back seat to getting something to work.

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<?php function foo() {
$numargs = func_num_args(); if ($numargs > 2) {
echo "First: ". func_get_arg(0). "\n";
echo "Second: ". func_get_arg(1). "\n";
echo "Third: ". func_get_arg(2). "\n";
} return $numargs;
}
$n = foo (10, 15, 20); //傳入 3 個參數 echo $n; ?>

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