当PHP被禁用的PHP函数:tempnam()后

当PHP被禁用的PHP函数:tempnam() 后,tempnam()可建立一个临时档，档名不会与同目录中的档案重覆。

　　传回字串就是建立的临时档名。若发生错误则传回空字串。

　　而smarty运行就必须在类似templates_c的设置编译目录,然后运行后它会自动创建类似%%

　　43^43B^43B32F4B%%index.htm.php的临时档,所以,tempnam()被禁用后,当然不能自动创建类似%%

　　43^43B^43B32F4B%%index.htm.php的临时档,自然自动创建类似%%
　　43^43B^43B32F4B%%index.htm.php的临时档,是一片空白.

　　smarty中使用tempnam函数的程序是internals/core.write_file.php,如下代码:

PHP代码:-----------------------------------------------------------------------
// write to tmp file, then rename it to avoid
// file locking race condition
$_tmp_file = tempnam($_dirname, 'wrt');
if (!($fd = @fopen($_tmp_file, 'wb'))) {
$_tmp_file = $_dirname . DIRECTORY_SEPARATOR . uniqid('wrt');
if (!($fd = @fopen($_tmp_file, 'wb'))) {
$smarty->trigger_error("problem writing temporary file '$_tmp_file'");
return false;
}
}
fwrite($fd, $params['contents']);
fclose($fd);

<?
error_reporting(E_ALL);
set_time_limit(0);
$runtimes = 100;

for ($i=0; $i<$runtimes; $i )
{
$str = f_socket("www.baidu.com","/s?wd=10000" . $i);
echo "<textarea>" . $str . "</textarea><br>";
}

function f_socket($website,$url)
{
$service_port = getservbyname('www', 'tcp');
$address = gethostbyname($website);

$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if (false == ($socket_result = socket_connect($socket, $address, $service_port)))
{
echo ("SOCKET_CONNECT_ERROR: " . socket_strerror(socket_last_error($socket)));
}

$in = "GET " . $url . " HTTP/1.1rn";
$in .= "Host: " . $website . "rn";
$in .= "Connection: closernrn";
socket_write($socket, $in, strlen($in));

$start_time = time();
$str = "";
do
{
if (false === ($out = socket_read($socket, 8192)))
{
echo ("SOCKET_READ_ERROR: " . socket_strerror(socket_last_error($socket)));
$str = "";
break;
}
if (time() - $start_time > 1)
{
echo ("SOCKET_READ_ERROR: Timeout!!!");
$str = "";
break;
}
$str .= $out;
} while ($out != "");

socket_close($socket);
return $str;
}
/*
function f_socket($website,$url)
{
$fp = fsockopen($website, 80, $errno, $errstr, 30);
if (!$fp)
{
}
else
{
$out = "GET " . $url . " HTTP/1.1 ";
$out .= "Host: " . $website . " ";
$out .= "Connection: Close ";
fwrite($fp, $out);
$str = "";
$start_time = time();
while (!feof($fp))
{
$str .= fread($fp, 8192);
if (time()-$start_time > 1)
{
$str = "";
echo "timeout!!!";
break;
}
}
return $str;
}
}
*/
?>

<?php
function cnSubStr($string,$sublen)
{
if($sublen>=strlen($string))
{
return $string;
}
$s="";
for($i=0;$i<$sublen;$i )
{
if(ord($string{$i})>127)
{
$s.=$string{$i}.$string{ $i};
continue;
}else{
$s.=$string{$i};
continue;
}
}
return $s;
}// End Function cnSubStr($string,$sublen)

/////////// Use like this :

echo "<p>__________________________<p>";
$string="242432反对感是456犯得上广泛大使馆地方7890";
$sublen=strlen($string);
$len=20;
echo $string."<p>";
echo "总长为：".($sublen 1)."<p>";
echo "截取数：".$len."<p>";

for($i=1;$i<=$sublen 1;$i ){
if($i>$len){
echo $i."<b> →</b> ".cnSubStr($string,$i)."…<br>";
continue;
}
echo $i."<b> →</b> ".cnSubStr($string,$i)."<br>";
}

?>

我们在实际做的过程中很是简单的，希望大家好好研究一下，给补充多点功能。本程序须在PHP and mySQL的环境下运行。有三个文件：comments.php, 是用来显示[评论的, commentadd.php, 用来处理评论内容的, and commentform.html 通过FROM来提交评论。

　　1.首先建立一个数据库，假如已经建立则建立一个符合条件的表：
　　CREATE TABLE `comtbl` (
　　`postID` INT NOT NULL AUTO_INCREMENT ,
　　`postTITLE` TEXT NOT NULL ,
　　`posterNAME` TEXT NOT NULL ,
　　`posterEMAIL` TEXT NOT NULL ,
　　`postTIME` TIMESTAMP NOT NULL ,
　　`postTXT` TEXT NOT NULL ,
　　PRIMARY KEY ( `postID` )
　　);

　　评论查看页：COMMENTS.PHP，具体内容为(有用户名和密码的在实际工作中要改变)：
$dbcnx = mysql_connect("localhost", "username", "password");
mysql_select_db("comments");
接下来需要对表进行查询，并且把ID 按Descending: 顺序排序：

　　$result = mysql_query("SELECT * FROM comtbl ORDER BY postID DESC");
if (!$result) {
echo("<b>Error performing query: " . mysql_error() . "</b>");
exit();
}

　　在这里因为要读出好多条记录，所以用循环来读，具体程序如下：
while ($row = mysql_fetch_array($result) ) {
$msgTxt = $row["postTXT"];
$msgId = $row["postID"];
$SigName = $row["posterNAME"];
$SigDate = $row["postTIME"];
$msgTitle = $row["postTITLE"];
$url = $row["posterEMAIL"];

　　现在到了最要害的一步了，也是困难的一步: 因为在这里用到MySQL's TIMESTAMP 函数 (功能是可以自动的饿把时间添加到一个表中),并且需要取得时间的字符串，使用字符串函数substr() ( $yr 表示年, $mo 表示月,　等等):

$yr = substr($SigDate, 2, 2);
$mo = substr($SigDate, 4, 2);
$da = substr($SigDate, 6, 2);
$hr = substr($SigDate, 8, 2);
$min = substr($SigDate, 10, 2);
　　还需要对上述代码的功能加以扩充来实现12或24小时表示或者用　AM和PM来表示上下午，代码如下：

　　if ($hr > "11") {
$x = "12";
$timetype = "PM";
$hr = $hr - 12;
}else{
$timetype = "AM";
}

　　另外，当评论者要是留下Email 的话，我们可以在这里来建立一个连接实现联系发评论的人．代码如下：

　　if (!$url) {
$url = "#";
}else{
$stat = $url;
$url = "mailto:" . $url . "";
}

　　最后，我们可以按行来显示数据，并且关闭循环,最终的显示代码如下：

　　echo("<p><b>$msgTitle</b>

函数Abs()

描述：

mixed abs (mixed number);

Returns the absolute value of number. If the argument number is float, return type is also float, otherwise it is int(返回所输的数字的绝对值，浮点型返回浮点型，其他返回整型)

函数Acos()

描述：

float acos (float arg);

Returns the arc cosine of arg in radians(返回角的余弦值)
Adabas D功能
函数ada_afetch()
描述：
fetch a result row into an array(返回结果到一个数组里)
函数ada_autocommit()
描述：
toggle autocommit behaviour

函数ada_close()
描述：
close a connection to an Adabas D server (关掉一个数据库的关联)

函数ada_commit()
描述：
commit a transaction (提交一个处理)

函数ada_connect()
描述：
connect to an Adabas D datasource(联接一个数据库)
函数ada_exec()
描述：
prepare and execute a SQL statement(执行一个SQL语句)
函数ada_fetchrow()
描述：
fetch a row from a result(从数据库中取一条记录)

函数ada_fieldname()
描述：
get the columnname(得到字段名)
函数ada_fieldnum()
描述：
get column number(得到字段的总数)

函数ada_fieldtype()
描述：
get the datatype of a field(取得字段的类型)

函数ada_freeresult()
描述：
free resources associated with a result

函数count()
描述：
计算一变量中元素的个数
int count (mixed var);
Returns the number of elements in var , which is typically an array (since anything else will have one element).
Returns 0 if the variable is not set.
Returns 1 if the variable is not an array.



函数current()
描述：
传回数组指针目前所指的元素



mixed current (array array);



Each array variable has an internal pointer that points to one of its elements. In addition, all of the elements in the array are linked by a bidirectional linked list for traversing purposes. The internal pointer points to the first element that was inserted to the array until you run one of the functions that modify that pointer on that array.



The current() function simply returns the array element that's currently being pointed by the internal pointer. It does not move the pointer in any way. If the internal pointer points beyond the end of the elements list, current() returns false.



函数each()
描述：
返回数组中下一对key/value的值



array each (array array);



Returns the current key/value pair from the array array and advances the array cursor. This pair is returned in a four-element array, with the keys 0 , 1 , key , and value . Elements 0 and key each contain the key name of the array element, and 1 and value contain the data.



Example 1. each() examples



$foo = array( "bob", "fred", "jussi", "jouni" ); $bar = each( $foo );
$bar now contains the following key/value pairs:



0 => 0
1 => 'bob'
key => 0
value => 'bob'



$foo = array( "Robert" => "Bob", "Seppo" => "Sepi" ); $bar = each( $foo );



$bar now contains the following key/value pairs:



0 => 'Robert'
1 => 'Bob'
key => 'Robert'
value => 'Bob'



Example 2. Traversing $HTTP_POST_VARS with each()