- php获取url传递的id值：$id = $_GET['id'];
- php获取当前url：http://www.hack001.com/post/174
- php中函数function的使用：
function title()
{
.....代码
return $head
}
return 后加需要返回的值
- php判断url是否可以打开
<?php
$url = "/upload/201110/20111008192257383.gif";
$array = get_headers($url,1);
if(preg_match('/200/',$array[0])){
echo "<pre/>";
print_r($array);
}else{
echo "无效url资源！";
}
?>
- php抓取指定网页全部代码
<?php
$url='http://www.baidu.com/';
echo file_get_contents( $url );
?>
- PHP抓取修改替换
<?
$url = '目标网址';
$lines_array = file($url);
$lines_string = implode('',
$lines_array); eregi("抓取开始代码(.*)抓取结束代码", $lines_string, $head);
$head = str_replace(array("删除字符1","删除字符2","删除字符3","删除字符4"),"",$head);
$str = str_replace("查找代码1","替换代码1",$head[0]);
$str = str_replace("查找代码2","替换代码2",$str);
$str = str_replace("查找代码3","替换代码3",$str);
echo $str;
?>
- PHP正则表达式抓取网页
<?
$url = '目标网址';
$lines_array = file($url);
$lines_string = implode('',
$lines_array); eregi("抓取开始代码(.*)抓取结束代码", $lines_string, $head);
$head = str_replace(array("删除字符1","删除字符2"),"",$head);
$str3 = preg_replace("(正则表达式查找)","正则表达式替换",$head[0]);
echo $str3;
?>
- php抓取页面并转编码
<?php
$url = 'http://www.kuang168.com/quote/';
$lines_array = file($url);
$lines_string = implode('',
$lines_array); eregi("<div class=\"subline\">
<ul>(.*)</ul>
</div>
</td>", $lines_string, $head);
$head = str_replace(array("<div class=\"subline\">
<ul>","</ul>
</div>
</td>","<span class=\"f_r\">","删除字符4"),"",$head);
$str = str_replace("</span>"," ",$head[0]);
$str = str_replace("查找代码2","替换代码2",$str);
$str = str_replace("查找代码3","替换代码3",$str);
$str = mb_convert_encoding($str,'utf8','gb2312');
echo $str;
?>
- 调用这个文件:require_once()
- 魔术常量（Magic Constants）简介：http://www.hack001.com/post/165
- dede数据库操作类：http://www.hack001.com/post/166
- dede自创标签：http://www.hack001.com/post/167
- php输出的几种方式：http://www.hack001.com/post/168
- php截取字符串：用到PHP explode() 函数http://www.w3school.com.cn/php/func_string_explode.asp
- dede的{dede:php}获取当前文章id
{dede:php}
$thisid = $refObj->Fields['id'];
print_r($thisid);
{/dede:php}
- php判断是否包含
<?php
$url = "http://www.hack001.com/news/article_edit.php";
if(strpos($url,"article_edit") > 0)
{
echo "包含";
}
?>
- php判断长度
<?php
$url='http://www.hack001.com/news/plus/view.php?aid=';
echo strlen($url);
?>
- php连接mssql，查询sql语句然后循环输出
<?php
$conn=mssql_connect("127.0.0.1","root","123456");
mssql_select_db("sqldb");
$sql="select top 10 h.BuildID id,h.BuildName loupan,a.AreaName quyu,convert(int,h.BuildPrice) jiage,h.BuildKaipanDate kaipanshijian from dbo.Ant_Area a,dbo.Ant_HouseBuild h where h.BuildAreaID=a.AreaID order by h.BuildID desc";
$query = mssql_query($sql,$conn);
while($row=mssql_fetch_array($query)){
?>
<?=$row[loupan]?>
<?=$row[quyu]?>
<?=$row[jiage]?>
<?=$row[kaipanshijian]?>
<br>
<?
}
?>
<?
mssql_close($conn);
?>
有时候php只显示500错误，而不说哪个地方错了，需要看错误信息可以这样操作 调试的时候把php.ini中的display_errors = Off改成On
或者 error_log = D:\Web\error.log 在error.log中查看错误日志!