php小代码

function mySetCookie($data, $name){

    if(empty($data) || empty($name))return;

    $args = func_get_args();

    $time = empty($args[2])? time() + 3600 : time() + $args[2];

    $path = empty($args[3])? '' : $args[3];

    $domain = empty($args[4])? '' :  $args[4];

    $secure = empty($args[5])? '' : $args[5];

    if(is_array($data)){

        foreach($data as $key => $val){

            $full = "{$name}[$key]";

            setcookie($full, $val, $time, $path, $domain, $secure);

        }

    }else{

        setcookie($name, $data, $time, $path, $domain, $secure);

    }



}



$data = array('name' => '李四', 'age' => 15);

mySetCookie($data,'userInfo');

print_r($_COOKIE);

 

//冒泡排序

function arrSort(&$arr, $asc = ''){

    $times = count($arr) - 1;

    for($i = 0; $i < $times; $i++){

        for($j = 0; $j < $times - $i; $j++){

            if($arr[$j] > $arr[$j + 1]){

                $temp = $arr[$j];

                $arr[$j] = $arr[$j + 1];

                $arr[$j + 1] = $temp;

            }

        }

    }

    if('' != $asc) $arr = array_reverse($arr, false);//反转数组元素

}



//选择

function seleSort(&$arr){

    $times = count($arr) - 1;

    $jMax = count($arr);

    for($i = 0; $i < $times; $i++){

        $min = $arr[$i];

        $minId = $i; 

        for($j = $i + 1; $j < $jMax; $j++){

            if($min > $arr[$j]){

                $min = $arr[$j];

                $minId = $j;

            }

        }

        $temp = $arr[$i];

        $arr[$i] = $arr[$minId];

        $arr[$minId] = $temp;

    }

}



//插入

function inserSort(&$arr){

    $times = count($arr);

    for($i = 1; $i < $times; $i++){

        $insert = $arr[$i];

        $insertId = $i - 1;

        while($insertId >= 0 && $insert < $arr[$insertId]){

            $arr[$insertId + 1] = $arr[$insertId];

            $insertId--;

        }

        $arr[$insertId + 1] = $insert;

    }

}





写一个函数，算出两个文件的相对路径。

function relative_dir($fileA, $fileB){//A相当于B，所在目录

    $aPath = explode('/',dirname($fileA));

    $bPath = explode('/',dirname($fileB));

    $bLen = count($bPath);

    $j = 1;

    for($i = 1; $i < $bLen; $i++){

        if(isset($bPath) && isset($aPath)){

            if($aPath[$i] == $bPath[$i]){$j++;}//累计相同路径部分

            if($aPath[$i] != $bPath[$i]){$path .= '../';}//不同的，则增加退回上级

        }

    }

    $path .= implode('/',array_slice($aPath, $j)).'/'.basename($fileA);

    return $path;

}



$a = 'a/b/c/test/5/8/aaa.php';

$b = 'a/b/c/check/1/2/3/4/bbb.php';

echo relative_dir($a,$b);



以附件方式实现文件下载：

$file = 'e:/个人简历.doc';

$file = iconv('utf-8', 'gb2312',$file);

if(file_exists($file)){

    $fname = basename($file);

    $fsize = filesize($file);

    header("Content-type:application/octet-stream");//二进制数据

    header("Content-Disposition:attachment;filename={$fname}");//附件形式

    header("Accept-ranges:bytes");

    header("Accept-length:".$fsize);

    readfile($file);

}else{

    exit('flie not found!');

}



遍历一个目录，及其子目录：

function recurDir($pathName){

    $result = array();

    $temp = array();

    if(!is_dir($pathName) || !is_readable($pathName)) return null;

    $allFiles = scandir($pathName);

    foreach($allFiles as $fileName){

        if(in_array($fileName, array('.','..')))continue;

        $fullName = $pathName . '/' . $fileName;

        if(is_dir($fullName)){

            $result[$fileName] = recurdir($fullName);

        }else{

            $temp[] = $fileName;

        }

    }

    foreach($temp as $f){

        $result[] = $f;

    }

    return $result;

}

$pathName = 'D:\AppServ\www\zbseoag\\';

print_r(recurDir($pathName));



从URL中获取文件扩展名：

 function getExt($url){

   $arr = parse_url($url);//把URL解析成数组

   $file = basename($arr['path']);

   $ext = explode('.',$file);

   return end($ext);

}



mysql事务处理：



 mysql_query('BEGIN');

 mysql_query("INSERT INTO customerinfo(`name`) VALUES('$name1')");

 mysql_query('SELECT * FROM `orderinfo` where customerid='.$id);

 mysql_query('COMMIT');



获取用户或服务器信息：

echo $_SERVER['REMOTE_ADDR']; // 或者 getenv('REMOTE_ADDR') 浏览当前页面的用户的 IP 地址。 

echo gethostbyname('www.baidu.com'); //根据域名，取得IP地址

echo $_SERVER['QUERY_STRING'];//查询参数字符串

echo $_SERVER['SERVER_NAME'];//服务器名



修改SESSION的生存时间：

方法1：将php.ini中的 session.gc_maxlifetime 设置为9999

方法2：$savePath = "./session_save_dir/";

       $lifeTime = 100;//单位：s

       session_save_path($savePath);

       session_set_cookie_params($lifeTime);

       session_start();



PHP正则：

function checkEmail($email){

    $pregEmail = "/([a-z0-9]*[-_/.]?[a-z0-9]+)*@([a-z0-9]*[-_]?[a-z0-9]+)+[/.][a-z]{2,3}([/.][a-z]{2})?/i";

    return preg_match($pregEmail,$email); 

}



查看PHP支持的函数：

$arr = get_defined_functions(); 

echo "<pre>这里显示系统所支持的所有函数,和自定以函数"; 

print_r($arr); 

echo "</pre>";



把数据解析成变量：

$a = 'Orig';

$my_array = array("a" => "Cat", "b" => "Dog");

extract($my_array, EXTR_PREFIX_SAME, 'the');

echo '$a='.$a.'$b='.$b.'$the_a='.$the_a;



文件上传：

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<script>

function addUpload(){

    document.getElementById("upfiles").innerHTML += '<li>文件：<input type="file" name="files[]" /></li>';

}

function resetUpload(){ 

  document.getElementById("upfiles").innerHTML = '<li>文件：<input type="file" name="files[]" /></li>';

}

</script>

<form action="" method="post" enctype="multipart/form-data" >

<ul id="upfiles">

<li>文件：<input type="file" name="files[]" /></li>

</ul>

<input type="submit" value="提交" />

<input type="button" value="增加上传框" onClick="addUpload()" />

<input type="button" value="重设上传框" onClick="resetUpload()" />

</form>



$files = 'files';//files是$_FILES中的一个元素数组,并所上传文件信息进行了归类

$upDir = './upImg/';

$fTypes = 'jpg|gif|txt|chm';



function upFilse($files, $upDir, $fTypes){

    if(isset($_FILES[$files]['name'])){

        if(!is_dir($upDir)) mkdir($upDir, 0777, true) or exit('上传目录创建失败！');

        $ftypeArr = explode('|',$fTypes);

        foreach($_FILES[$files]['name'] as $i => $value){

            $fType = strtolower(end(explode(".",$_FILES[$files]['name'][$i])));

            if(in_array($fType, $ftypeArr)){

                $path = $upDir.time().$_FILES[$files]['name'][$i];//指定目录，且包含有文件名

                move_uploaded_file($_FILES[$files]['tmp_name'][$i], $path);//移到指定目录

                if($_FILES[$files]['error'][$i] == 0){

                    $file[$_FILES[$files]['name'][$i]] = $path; 

                    list($name, $path) = each($file);//each(数组)返回当前由键名与键值所构成的数组；list(变量1, 变量n 【或数组】) = 数字索引的数组,将值赋给变量。

                    $sql = "INSERT INTO `database`.`table`(name, path) VALUES ('$name', '$path')";

                    $msg[] =  $value.'文件上传成功';    

                }else

                    $msg[] = $value.'文件上传失败！';

            }else 

                $msg[] = $value.'文件格式不正确！';

        }

        return $msg;

    }

}

print_r(upFilse($files, $upDir, $fTypes));



求今天是星期几：

$time = getdate();//获取当前时间戳中的时间信息

$weekday = array('星期天', '星期一', '星期二', '星期三', '星期四', '星期五', '星期六');

$wday = $time['wday'];//当前是一个星期中的第几天

echo date("今天是：Y年m月d日H:i:s $weekday[$wday]");



求下周一是几月几日：

$time = time();//当前时间戳

$weekday = date('w');//当天的数字星期

switch($weekday){

    case 0: $next_week = $time+86400;break;//星期天则加一天

    case 1: $next_week = $time+7*86400;break;//星期一,则加七天

    case 2: $next_week = $time+6*86400;break;

    case 3: $next_week = $time+5*86400;break;

    case 4: $next_week = $time+4*86400;break;

    case 5: $next_week = $time+3*86400;break;

    case 6: $next_week = $time+2*86400;break;

}

echo date('Y-m-d',$next_week);



逐行读取文件内容：

$fhandle = fopen('../open.txt','rb');

while(!feof($fhandle)){//判断是否到文件结尾

    echo fgets($fhandle);//一行

    echo fgetss($fhandle);//一行,且去除标记代码

}

fclose($fhandle);



逐字读取文件内容：

$fhandle = fopen('../open.txt','rb');

while(($letter = fgetc($fhandle)) != false){//逐个循环获取每个字符

    echo $letter;

}

fclose($fhandle);



读取文件指定字符长度：

$fhandle = fopen('../open.txt', 'rb');

echo fread($fhandle, 3);//读取3个字符

echo fread($fhandle, filesize('../open.txt'));//剩余字符绝对小于文件总大小,故可用作剩余内容的



ADODB 类库操作数据库：

include('adodb5/adodb.inc.php');

$db_path = 'data/db_meeting.mdb';

$db = ADONewConnection('access');

$db->Pconnect('Driver={Microsoft Access Driver (*.mdb)};Dbq='.$db_path);

$db->Execute("set names gb2312");

$ADODB_FETCH_MODE = 1; 

$result = $db->SelectLimit($sql, $count, $offset);

$result-> FieldCount();



if(!$result){

    echo $db->ErrorMsg();

}else{

    while(!$result->EOF){  

        $result->fields[1];

    }

      $result->MoveNext();//MoveFirst, MoveLast, Move(10)

}



格式化时间：

 function units($time){

    $year   = floor($time / 60 / 60 / 24 / 365);//当前时间戳,最多有 $year 个整数年

    $time  -= $year * 60 * 60 * 24 * 365;//减$year 年的时间

    $month  = floor($time / 60 / 60 / 24 / 30);//同理向下

    $time  -= $month * 60 * 60 * 24 * 30;

    $week   = floor($time / 60 / 60 / 24 / 7);

    $time  -= $week * 60 * 60 * 24 * 7;

    $day    = floor($time / 60 / 60 / 24);

    $time  -= $day * 60 * 60 * 24;

    $hour   = floor($time / 60 / 60);

    $time  -= $hour * 60 * 60;

    $minute = floor($time / 60);

    $time  -= $minute * 60;

    $second = $time;

    $elapse = '';

    $unitArr = array('年'  =>'year', '个月'=>'month',  '周'=>'week', '天'=>'day','小时'=>'hour', '分钟'=>'minute', '秒'=>'second'

    );



    foreach ( $unitArr as $cn => $u )  {

        if ( $$u > 0 ) {

            $elapse = $$u . $cn;

            break;

        }

    }

    return $elapse;

}



删除数据库中没有记录的图片：

public function delImg($datas, $delDir = '.'){

    $arrExt = array('png','jpg','gif');

    $files = scandir($dir);

    foreach($files as $val){

        $temp = explode('.', $val);

        if(in_array(end($temp),$arrExt)){

            $allFiles[] = $val;

        }

    }

    $delFiles = array_diff($allFiles,$data);

    foreach($delFiles as $val){

        $file = rtrim($dir,'/').'/'.$val;

        unlink($file);echo $file.'<br/>';

    }

 }