PHP

在Ubuntu 裡安裝 PDT + Xdebug + 決解在8.04的錯誤

Aery — Wed, 07 May 2008 01:19:00 GMT

PDT 1.0 + Xdebug in Ubuntu 安裝過程 [討論區 - 程式編輯器]
http://twpug.net/modules/newbb/viewtopic.php?topic_id=2887

我是照這篇去做的，完成之後會出現一個錯誤訊息如下：
Could not initialize the application's security component. The most likely cause is problems with files in your application's profile directory. Please check that this directory has no read/write restrictions and your hard disk is not full or close to full. It is recommended that you exit the application and fix the problem. If you continue to use this session, you might see incorrect application behaviour when accessing security features.

解決方法很簡單，手動建立$HOME/.mozilla/eclipse這個目錄即可
來源：https://bugs.launchpad.net/ubuntu/+source/eclipse/+bug/188380

UTF-8與session_start()

Aery — Sun, 13 Jan 2008 19:24:00 GMT

剛剛發生了一件很怪的事
我已經把session_start();放到設定檔的最前面了
甚至是刪到只剩session_start();他還是會發生錯誤
Warning: session_start(): Cannot send session cookie - headers already sent by ......

之前遇到這個就是把output buffer打開
今天心血來潮找了一下原因~~~~~
原來是UTF-8的BOM搞的鬼
我這個檔案是用Notepad++開的

解決方式：
再用Nodepad++開啟然後格式 => 編譯成 UTF-8 碼〈檔首無 BOM〉=> 存檔

關閉指定目錄的PHP

Aery — Mon, 24 Dec 2007 18:38:00 GMT

apache的設定：
<Directory /usr/local/apache/htdocs/upload>
php_flag engine off
#如果是php3換成php3_engine off
</Directory>

用php下載指定檔案並重新命名(另存新檔)

Aery — Mon, 24 Dec 2007 18:16:00 GMT

上傳的程式碼(放在表單後的JavaScript)：<script language="javascript"> function validate() { // 切割檔案路徑 var Ary = document.getElementById('file').value.split('\\'); // 建立隱藏標籤 var hideTag = document.createElement("input"); hideTag.setAttribute('name', 'filename'); hideTag.setAttribute('type', 'hidden'); document.getElementById('form1').appendChild(hideTag); // 置入檔名到隱藏標籤 hideTag.value=Ary[Ary.length-1]; return true; } document.getElementById('form1').onsubmit = function() { return validate(); }; </script>

上傳的程式碼(接收上傳檔案的PHP)： <?php function ch_filename($name) { $arr = explode('.', $name); $arr[0] = (rand()%100).substr(md5($arr[0]), 0, 28); return join('.', $arr); } if($_FILES['file']['size'] > 0) { $filename = ch_filename($_POST['filename']); move_uploaded_file($_FILES['file']['tmp_name'],'upload/'.$filename); // 新增資料到資料庫(filepath|filename) $db->query("UPDATE `news` SET `file` = '".$_POST['filename']."|upload/".$filename."';"); } ?>

下載的超連結：<a href="get_file.php?path=<?=$filepath?>&filename=<?=urlencode($filename)?>"><?=$filename?></a>

get_file.php 程式碼： <?php if(empty($_GET['path']) || empty($_GET['filename'])) { echo '非正常路途徑進入本頁或參數錯誤'; exit(); } if(file_exists($_GET['path'])) { $FILEname = urlencode($_GET['filename']); if(ini_get('zlib.output_compression')) ini_set('zlib.output_compression', 'Off'); header("Content-Type: application/octetstream; name=$FILEname"); //for IE & Opera header("Content-Type: application/octet-stream; name=$FILEname"); //for the rest header("Content-Disposition: attachment; filename=$FILEname;"); header("Content-Transfer-Encoding: binary"); header("Cache-Control: cache, must-revalidate"); header("Pragma: public"); header("Expires: Mon, 26 Jul 1997 05:00:00 GMT"); header("Last-Modified: " . gmdate("D, d M Y H:i:s") . "GMT"); readfile($_GET['path']); } else echo '檔案不存在'; ?>

用PHP正則表達式清除字符串的空白

Aery — Mon, 24 Dec 2007 18:09:00 GMT

<?php $str = " This line contains\tliberal \r\n use of whitespace.\n\n"; // First remove the leading/trailing whitespace //去掉開始和結束的空白 $str = trim($str); // Now remove any doubled-up whitespace //去掉跟隨別的擠在一塊的空白 $str = preg_replace('/\s(?=\s)/', '', $str); // Finally, replace any non-space whitespace, with a space //最後，去掉非space 的空白，用一個空格代替 $str = preg_replace('/[\n\r\t]/', ' ', $str); // Echo out: 'This line contains liberal use of whitespace.' echo "<pre>{$str}</pre>"; ?>

參考來源：http://xwarez.com.ru/html/3/33/PHPgengbingaicai.html