最优良人 » php

php多维数组的搜索

lin — Mon, 17 Dec 2012 12:48:04 +0000

1 php搜索多维数组的键值

如下面例子:

$foo[1]['a']['xx'] = 'bar 1';
$foo[1]['b']['xx'] = 'bar 2';
$foo[2]['a']['bb'] = 'bar 3';
$foo[2]['a']['yy'] = 'bar 4';
$foo[3]['c']['dd'] = 'bar 3';
$foo[3]['f']['gg'] = 'bar 3';
$foo['info'][1] = 'bar 5';

如果要查找 bar 3 怎么进行查找呢。有三个结果，而这三个结果都要，看下面的函数：
-------------------------------------------------------------------------------------------------------------------------------
function array_search_re($needle, $haystack, $a=0, $nodes_temp=array()){
global $nodes_found;
$a++;
foreach ($haystack as $key1=>$value1) {
    $nodes_temp[$a] = $key1;
    if (is_array($value1)){
      array_search_re($needle, $value1, $a, $nodes_temp);
    }
    else if ($value1 === $needle){
      $nodes_found[] = $nodes_temp;
    }
}
return $nodes_found;
}
---------------------------------------------------------------------------------------------------------------------------------
这个函数就可以把上面要查找到的内容全部返回出键名来
$result = array_search_re('bar 3', $foo);

print_r($result);

输出结果为如下：
Array ( [0] => Array ( [1] => 2 [2] => a [3] => bb )
          [1] => Array ( [1] => 3 [2] => c [3] => dd )
          [2] => Array ( [1] => 3 [2] => f [3] => gg )
        )

1 php搜索多维数组的键名

function array_search_key($needle, $haystack){
global $nodes_found;

foreach ($haystack as $key1=>$value1) {

if ($key1=== $needle){

  $nodes_found[] = $value1;

   }
    if (is_array($value1)){
      array_search_key($needle, $value1);
    }


}

return $nodes_found;
}
$result = array_search_key('a', $foo);

print_r($result);

输出结果为如下：

Array
(
    [0] => Array
        (
            [xx] => bar 1
        )

    [1] => Array
        (
            [bb] => bar 3
        )

    [2] => Array
        (
            [yy] => bar 4
        )

)

php过滤客户提交参数，防注入

lin — Sat, 24 Nov 2012 09:16:40 +0000

以下代码实现过滤php的$_GET 和$_POST参数

/**
* 安全防范
*/
function Add_S($array)
{
foreach($array as $key=>$value)
{
if(!is_array($value))
{
$value = get_magic_quotes_gpc()?$value:addslashes($value);
$array[$key]=filterHtml($value);
}
Else
{
Add_S($array[$key]);
}
}
return $array;
}
function glstr($var) {

if (is_array($var)) {
return Add_S($var);
}
elseif(strlen($var)){
$var = get_magic_quotes_gpc()?$var:addslashes($var);

$var = filterHtml($var);
}
return $var;
}
function filterHtml($html)
{
$farr = array(
"/]*?)>/eis",
"/<(\/?)(html|body|head|link|meta|base|input)([^>]*?)>/eis",
"/<(script|i?frame|style|title|form)(.*?)<\/\\1>/eis",
"/(<[^>]*?\s+)on[a-z]+\s*?=(\"|')([^\\2]*)\\2([^>]*?>)/isU",//过滤javascript的on事件
"/\s+/",//过滤多余的空白
);
$tarr = array(
"",
"",
"",
"\\1\\4",
" ",
);
$html = preg_replace( $farr,$tarr,$html);
return $html;
}
if (sizeof($_GET)) {
foreach($_GET as $key => $value) {
$_GET[$key] = glstr($value); //
}

}
if (sizeof($_POST)) {
foreach($_POST as $key => $value) {
$_POST[$key] = glstr($value); //
}
}

smarty模版使用php标签，如何获取模版变量

lin — Sat, 22 Sep 2012 03:54:23 +0000

已经assign一个模版变量$assign,由于要做特殊的循环输出，使用for循环，因此使用到了php标签，但是php语句和模版语句的变量作用域是不同的，因此不能直接获取到

for($i=0;$i echo '

'.$assign[$i][title].'

'.$assign[$i+1][title].'

';}
{{/php}}

解决的方法是：模版变量全部存在smarty的一个对象里面；只要在for之前进行赋值：$assign = $this->_tpl_vars[assign];

{{php}}
$assign = $this->_tpl_vars[assign];
for($i=0;$i echo '

'.$assign[$i][title].'

'.$assign[$i+1][title].'

';}
{{/php}}

php字符串截取函数,自动清除网页标签

lin — Thu, 07 Jun 2012 09:40:29 +0000

/**
* 字符串截取函数自动清除网页标签
**/
Function str_cut($string, $length = 80, $etc = '...', $code = 'UTF-8')
{
$string = strip_tags(preg_replace('!\s+!', $string, ' '));
if ($length == 0)
return '';
if ($code == 'UTF-8') {
$pa = "/[\x01-\x7f]|[\xc2-\xdf][\x80-\xbf]|\xe0[\xa0-\xbf][\x80-\xbf]|[\xe1-\xef][\x80-\xbf][\x80-\xbf]|\xf0[\x90-\xbf][\x80-\xbf][\x80-\xbf]|[\xf1-\xf7][\x80-\xbf][\x80-\xbf][\x80-\xbf]/";
}
else {
$pa = "/[\x01-\x7f]|[\xa1-\xff][\xa1-\xff]/";
}
preg_match_all($pa, $string, $t_string);
if (count($t_string[0]) > $length)
return join('', array_slice($t_string[0], 0, $length)) . $etc;
return join('', array_slice($t_string[0], 0, $length));
}

php清空某个目录的方法

lin — Mon, 04 Jun 2012 07:05:50 +0000

以下代码可以清空多层的目录结构：

function del_dir($dir){
{
if (!$dir) { return ; }
$cacheDir = $dir;
$dh = opendir($cacheDir);
while ( $file = readdir($dh) ) {

if (($file == '.') || ($file == '..')) { continue; }

if (file_exists( $cacheDir .'/'.$file)) {
if(is_dir( $cacheDir .'/'.$file)){
del_dir($cacheDir .'/'.$file);
}elseif (!unlink($cacheDir .'/'. $file)) {

//删除完操作
}
}
}

}
}

phpmyadmin导出的sql如何通过php导入

lin — Mon, 04 Jun 2012 04:15:01 +0000

以下函数可以直接把从phpmyadmin导出的sql文件直接通过php插入数据库：

//$file表示通过读取sql文件返回的字符串，比如$file2=file_get_contents('db.sql');

function import($file2){

$Db = new Db();
$file2=explode("\n",$file2);//将文件内容按行读入到数组

$c1=count($file2);
for($j=0;$j<$c1;$j++)
{
$ck=substr($file2[$j],0,4);//取每行的前4个字符
if( ereg("#",$ck)||ereg("--",$ck) )//去掉注释
{
continue;
}
$arr[]=$file2[$j];//将去掉注释的文件内容按行读入数组$arr,数组每个元素对应一行
}
$read=implode("\n",$arr); //重新组织文件内容到一个字符串,(按照原来分好的一行一行的)
$sql=str_replace("\r",'',$read);//去掉"\r(回车符)"

$detail=explode(";\n",$sql);
//将经上述整理过的文件内容再次按一条完整的sql语句(以;和\n分隔)导入到数组$detail,
//此时数组detail的每个元素对应一条完整的sql语句
$count=count($detail);
for($i=0;$i<$count;$i++)
{
$sql=str_replace("\r",'',$detail[$i]);//去掉每行sql中的回车符
$sql=str_replace("\n",'',$sql);//去掉换行符
$sql=trim($sql);//去掉前后空格
//现在的$sql
$Db->query($sql);

}

php date函数的时区问题，输出时间有误

lin — Sat, 02 Jun 2012 02:16:24 +0000

问题：echo date('o-m-j H:i'); 输出结果与本地时间相差8小时。
原因：时区未正确设置。
两种解决方法:

1.加入date_default_timezone_set('Asia/Shanghai');
2. 修改php.ini
[Date]
; Defines the default timezone used by the date functions
date.timezone = PRC 注:PRC为中化人民共和国

php使用mail函数发送邮件，解决乱码问题

lin — Fri, 01 Jun 2012 03:03:27 +0000

$to = 'sales@zui88.com';
$subject = "=?UTF-8?B?".base64_encode('网站收到一个新信息')."?=";
$message = "
用户姓名：{$_POST['name']}\n
用户邮箱：{$_POST['email']}\n
用户电话：{$_POST['contact']}\n
留言内容：{$_POST['content']}
";
$headers = 'From: webmaster@zui88.com' . "\r\n" .
'Reply-To: webmaster@zui88.com' . "\r\n" .
'X-Mailer: PHP/' . phpversion();
$headers .= 'Content-type: text/html; charset=utf-8' . "\r\n";

mail($to, $subject, $message, $headers);

移植方便的php数据库操作类，建表增删改查

lin — Wed, 30 May 2012 09:46:53 +0000

/**
*
* 数据操作类
* @author Xiaoqiang
* @link //
* @copyright Xiaoqiang
* @version Svn $Id$
* @package
*/
class Db {

var $links;
// 构造函数，初始化数据库（主机,用户名,密码,数据库名）
function __construct() {

$this->links = mysql_connect(DB_HOST, DB_USER, DB_PWD);
if(DEBUG){
mysql_select_db(DB_NAME) or die('ERROR:'.mysql_error());
}
else{
mysql_select_db(DB_NAME);
}
$char_sql = "SET NAMES '" . CHARSET . "'";
$this->query($char_sql);
}

/**
* ****************** 操作 ******************
*/
/**
* 增删改查操作方法
* 输入sql语句
* 返回布尔值或结果集$row
*/
function query($sql) {
if(DEBUG){
$render = mysql_query($sql) or die('query ERROR:'.mysql_error()."
sql语句出错：" . $sql);
return $render;
}
else{
return mysql_query($sql);
}
}
/**
* 计算行数方法
* 输入
* 结果数组
*/
function count($table,$condition='1') {

$sql = "select count(*) from `".DB_PREFIX.$table."` where $condition";
$result = $this->select($sql);
return $result[0]['count(*)'];
}
/**
* 原始的sql语句查操作方法
* 输入sql语句
* 结果数组
*/
function select($sql) {
$row = $this->query($sql);
$results = array();
while($arr = $this->fetch($row)){
$results[] = $arr;
}
//$this->free_result($row);
return $results;
}

/**
* 检查某字段是否存在某值
* @param 输入表名.字段,值
* @return id 或者 false
**/
function check_exists($table,$val){
$render = false;
$tab = explode('.',$table);
if($tab['1'] && $tab['1']!='id'){
$fields = $tab['1'];
$table = "{$tab[0]}.id,{$fields}";
}
else{
$fields = 'id';
$table = $tab[0].".id";
}
$condition = "`$fields` = '{$val}'";
$detail = $this->read($table,$condition);
if($detail[$fields]){
$render = $detail['id'];
}
return $render;
}

/**
* 查询多条数据方法
* 输入表名.字段，字段;查询条件，条数
* 如果条件是数组，则进入高级搜索模式
* 返回结果数组
*/
function readall($table,$condition='1',$limit='') {
$tab = explode('.',$table);
$table = $tab['0'];
if($tab['1']){
$fields = $tab['1'];
$fields_array =explode(',',$fields);
$fields = '';
foreach( $fields_array as $one){
$fields .= "`$one`,";
}
$fields = rtrim($fields,',');
}
else{
$fields = '*';
}
if(is_array($condition)){
$condition = $this->parse_condition($condition);
}
$sql = "select $fields from `".DB_PREFIX.$table."` where $condition";
if($limit)$sql .= " limit $limit";
return $this->select($sql);
}
/**
* 查询单条数据方法
* 输入表名.字段，字段;查询条件
* 返回结果数组
*/
function read($table,$condition='1') {
$render = $this ->readall($table,$condition,1);
return $render[0];
}
/**
* 修改数据方法
* 输入表名，插入数据array('字段'=>'值'),条件
* 返回布尔值
*/
function update($table,$data,$condition ) {

$set = '';
foreach( $data as $key=>$val){
$set .= "`$key` = '".$val."',";
}
$set = rtrim($set,',');
if(is_array($condition)){
$condition = $this->parse_condition($condition);
}
$sql = "update `".DB_PREFIX.$table."` set $set where $condition";
return $this->query($sql);
}
/**
* 插入数据方法
* 输入表名，数据array('字段'=>'值')
* 返回布尔
*/
function insert($table,$data) {

$fields = array();
$values = array();

foreach( $data as $key=> $val){
if(is_array($val)){
$_values = array();
$_fields = array();
foreach( $val as $k=> $v){
$_fields[]= "`$k`";
$_values[]= "'{$v}'";
}
$fields = $_fields;
$values[] = '('.implode(',',$_values).')';
}
else{
$fields[] = "`$key`";
$values[] = "'{$val}'";
}
}
$fields = implode(',',$fields);
$values = implode(',',$values);
$sql = "insert into `".DB_PREFIX.$table."` ($fields) values($values)";
return $this->query($sql);
}
/**
* 删除数据方法
* 输入表名，条件
* 返回bool
*/
function delete($table,$condition) {

if(empty($condition)){
die('条件不能为空');
}
if(is_array($condition)){
$condition = $this->parse_condition($condition);
}
$sql = "delete from `".DB_PREFIX.$table."` where $condition";
return $this->query($sql);
}
/**
* 解析条件的函数
* @param 条件数组
* $arr[] = "`id`==0"; $arr[] = "`id`==5"; $arr['id'] = "5"; $arr['or'][] = "`id`!=2"; $arr['or'][] = "`id`!=1"; $arr['or'][] = "`id`!=2"; $arr['groups'][]='id'; $arr['orders']['id']='asc'; $arr['orders']['td']='DESC'; *
* @return str
**/
function parse_condition($condition){
$and = '1';
$or = '0';
$groups = array();
$orders = array();
foreach( $condition as $key=>$val){
if(is_numeric($key)){
$and .= " and $val";
}
elseif(strtolower($key)== 'or'){
//处理or条件
if(is_array($val)){
foreach( $val as $k=>$v){
if(is_numeric($k)){
$or .= " or {$v}";
}
elseif(is_array($v)){
$v = implode(',',$v);
$or .= " or `$k` in ($v)";
}else{
$or .= " or `$k='{$v}'";
}
}

}else{
$or .= " or $val'";
}
}
elseif(strtolower($key)== 'groups'){
//处理group by
foreach( $val as $k=>$v){
$groups[] = $v;
}

}elseif(strtolower($key)== 'orders'){
//处理order by
foreach( $val as $k=>$v){
$orders[] = $k.' '.$v;
}

}else{
if(is_array($val)){
$val = implode(',',$val);
$and .= " and `$key` in ($val)";
}else{
$and .= " and `$key`='{$val}'";
}
}
}
if($and!='1' && $or!='0')$where = $and.' or '.$or;
elseif($and!='1') $where = $and;
elseif($or!='0') $where = $or;
if($groups)$where .= " group by ".implode(',',$groups);
if($orders)$where .= " order by ".implode(',',$orders);
$where = str_replace('1 and','',str_replace('0 or','',$where));

return $where;
}
/**
* 锁表方法
* 输入表名，锁定类型，r or w 写锁要放在读锁前面
* 返回bool
*/
function lock($table,$type='r') {

if($type=='r'){
$type = 'READ';
}
else{
$type = 'WRITE';
}
$sql = "lock table `".DB_PREFIX.$table."` $type";
return $this->query($sql);
}
/**
* 解锁表方法
*
* 返回bool
*/
function unlock( ) {

$sql = "unlock tables";
return $this->query($sql);
}
/**
* 结果集放入数组方法
* 返回数组，指针下移
*/

function fetch($row) {

return mysql_fetch_array($row,MYSQL_ASSOC);

}

/**
* 计算结果集行数方法
* 输入$row
* 返回行数
*/

function num_rows($row) {

return mysql_num_rows($row);

}

/**
* 计算结果集列数方法
* 输入$row
* 返回列数
*/

function num_fields($row) {

return mysql_num_fields($row);

}

/**
* 释放result结果集内存
* 返回布尔值
*/

function free_result($row) {

return mysql_free_result($row);

}

/**
* 查看指定表的字段名
* 输入表名
* 返回全部字段名数组
*/
function list_fields($table) {
$fields = mysql_list_fields(DB_NAME, DB_PREFIX.$table, $this->links);
$columns = mysql_num_fields($fields);

for ($i = 0; $i < $columns; $i++) {
$row[$i] = mysql_field_name($fields, $i);
}
return $row;

}

/**
* 查看数据库版本方法
*/

function version() {
return mysql_get_server_info();

}

/**
* 插入时查看插入ID
*/

function insert_id() {
return mysql_insert_id();

}
/**
* 分页方法
*/

function page($table,$condition='1',$pagesize=20,$id='page') {
$page = $_GET[$id];
if(!$page)$page= 0 ;
elseif(!is_numeric($page))die('分页出错');

//查找结果集
$p = $page * $pagesize;
$limit = $p.",".$pagesize;
$results = $this->readall($table,$condition,$limit);

//取得结果集行数
$num = $this->count($table,$condition);
//定义最后页 $maxpage
if ($num % $pagesize) {
$maxpage = (int) ($num / $pagesize +1);
} else
$maxpage = $num / $pagesize;
if(STATICS){
//从服务器端取得url信息

if($_GET[$id] === null){
$_SERVER["REQUEST_URI"] = str_replace('index.php','',$_SERVER["REQUEST_URI"]);
$_SESSION[$id] = str_replace('.html','',$_SERVER["REQUEST_URI"],$count);
$_SESSION[$id] = $count?$_SESSION[$id] :$_SESSION[$id].'index';
if(!sizeof($_GET))$_SESSION[$id].="-htm";
}
$str = "

First ";
if($page)$str .= "Previous ";
if($page-3>=0)$str .="".($page-2)." ";
if($page-2>=0)$str .="".($page-1)." ";
if($page-1>=0)$str .="".$page." ";
if($page < $maxpage)$str .=($page+1)." ";
if($page+1 < $maxpage)$str .="".($page+2)." ";
if($page+2 < $maxpage)$str .="".($page+3)." ";
if($page+3 < $maxpage)$str .="".($page+4)." ";
if($page+1 < $maxpage)$str .="Next ";
if(!$maxpage)$maxpage=1;
$str .="Last ".($page+1)."/".$maxpage."Total

";
}
else{
//从服务器端取得url信息

if($_GET[$id] === null){
$_SESSION[$id] = $_SERVER["REQUEST_URI"];
if(!sizeof($_GET))$_SESSION[$id].="?p=1";

}

$str = "

";
}
return array($results,$str);
}

/**
* 左连接多表查询
* @param
* @return
**/
function leftjoin($left,$right,$on,$condition,$limit=1){
$left = explode('.',$left);
$right = explode('.',$right);
$left['0'] = "`".DB_PREFIX.$left['0']."`";
$right['0'] = "`".DB_PREFIX.$right['0']."`";
if($left['1'] || $right['1']){
$fields = '';
if(!empty($left['1'])){
$_field = explode(',',$left['1']);
foreach( $_field as $one){
$fields.=$left['0'].'.`'.$one."`,";
}
}
if(!empty($right['1'])){
$_field = explode(',',$right['1']);
foreach( $_field as $one){
$fields.=$right['0'].".`".$one."`,";
}
}
$fields = rtrim($fields,',');
}
else{
$fields = '*';
}
$on = str_replace('\2',$right[0],str_replace('\1',$left[0],$on));
$condition = str_replace('\2',$right[0],str_replace('\1',$left[0],$condition));
$sql = "SELECT {$fields} FROM {$left[0]} LEFT JOIN {$right[0]} ON ( {$on} ) WHERE ( {$condition} ) LIMIT {$limit} ";

$query = $this->query($sql);
$field_num = mysql_num_fields($query);
while($arr = mysql_fetch_array($query,MYSQL_NUM)){
$_arr = array();
for( $i=0 ; $i<$field_num ; $i++ ){
$table = str_replace(DB_PREFIX,'',mysql_field_table($query, $i));
$field = mysql_field_name($query, $i);
$_arr[$table.'.'.$field] = $arr[$i];
}
$array[]=$_arr;

}
$array=$limit==1?$arrat[0]:$array;
return $array;
}
/**
* 用于创建一个表结构
* @param 表名，结构 array(字段，格式，注释) 表注释索引array(字段，字段) 全文搜索(字段，字段)
* @return 打印
**/

function createTable($tablename,$data,$comment='',$key='',$fulltext=''){
$_key='';
$_type = '';
$_fulltext = '';
$tablename = DB_PREFIX.$tablename;
$sql = "CREATE TABLE IF NOT EXISTS `$tablename` (
`id` int(10) unsigned NOT NULL auto_increment COMMENT 'ID',
";
foreach( $data as $one){
switch($one[1]){
case '':
$_type = 'varchar(255)';
break;
case 'tinyint':
$_type = 'tinyint(1)';
break;
case 'time':
$_type = 'int(10)';
break;
default:

if(strpos($one[1],'.')!==false){
$_type = explode('.',$one[1]);
$_type = $_type[0].'('.$_type[1].')';
}
else{
$_type = $one[1];
}
break;
}
$sql.="`{$one[0]}` $_type NOT NULL COMMENT '{$one[2]}',
";
}

if(!empty($key)){
foreach( $key as $one){
$_key.="KEY `$one` (`$one`),
";
}
}
if(!empty($fulltext)){
foreach( $fulltext as $one){
$_key.="FULLTEXT `$one` (`$one`),
";
}
}

$sql.= $_key.$_fulltext."PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=".CHARSET." COMMENT '$comment';
";
if(!$_GET[sure]){

if(empty($_GET)){
$url = '?sure=1';

}
else{
$url = $_SERVER["REQUEST_URI"].'&sure=1';
}

echo "即将执行以下建表操作：

$sql确定

";
}
elseif($_GET[sure] && $this->query($sql)){

echo "完成操作";
}
else{
echo "操作失败：
>

$sql

";
}

exit;

}
};

//实例

define("DB_HOST", 'localhost');
define("DB_USER", 'root');
define("DB_PWD", '');
define("DB_NAME", "test");
define("DB_PREFIX", "test_");
define('CHARSET', 'gbk'); // 编码
define("GEBUG", 1);

//建表
$Db=new Db();
$data[] = array('title','','标题');
$data[] = array('open','tinyint.1','是否公开');
$data[] = array('keyword','','关键词');
$data[] = array('content','text','内容');
$data[] = array('created','time','时间');
//$Db->createTable('article',$data,'文章表');
//增删改查
$data['title']='t';
$data['keyword']='k';
$Db->insert('article',$data);
$num = $Db->read('article.id','1 order by id desc');
$data['created'] = mktime()+$num['id'];
$Db->update('article',$data,"`id` =2");
$Db->delete('article',"`id` =3");

php采集程序，提取网页超链接，邮箱或其他特定内容

lin — Wed, 30 May 2012 08:48:29 +0000

以下代码从上一篇文章修改而来，专门用于提取网页所有超链接，邮箱或其他特定内容

//采集网页
function pick($url,$ft,$th)
{
$c=fetch_urlpage_contents($url);
foreach($ft as $key => $value)
{
$rs[$key]=fetch_match_contents($value["begin"],$value["end"],$c);
if(is_array($th[$key]))
{ foreach($th[$key] as $old => $new)
{
$rs[$key]=str_replace($old,$new,$rs[$key]);
}
}
}
return $rs;
}

$url="http://www.zui88.com"; //要采集的地址
$ft["a"]["begin"]='
$ft["a"]["end"]='>'; //截取的结束点

$rs=pick($url,$ft,$th); //开始采集

print_r($rs["a"]);