PHP 小代码

//清除 BOM 头
function clear_bom(&$content){
	if(substr($content, 0, 3) == chr(239).chr(187).chr(191)){
		$content = substr($content, 3);
	}
}



//获取网上的一个文件

function getUrlImage($url, $file = '', $maxExe = 0, $safe = false){

    $urlExt = explode('.', $url);

    $fileExt = array('txt','jpg','gif','png');

    if(!in_array(end($urlExt), $fileExt, true)) return false;

    $file = ($file)? $file.$urlExt : basename($url);

    $file = rand(1,1000).$file;

    ob_start(); //开启输出缓冲

    set_time_limit($maxExe); //开启最大运行时间

    readfile($url);//读入一个文件并写入到输出缓冲

    $data = ob_get_contents();

    ob_end_clean();

    file_put_contents($file,$data);

    if($safe && is_executable($file)){//为安全起见,判定一下文件是否可执行

        unlink($file);

        return false;

    }

    return $file;

}



getUrlImage('http://www.test.com/3675.jpg','newName');





//批量生成cookie

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

}



//选择排序

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;

    }

}



//插入排序

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;

    }

}





//计算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);

}



//PHP验证email格式

function checkEmail($email){

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

    return preg_match($pattern,$email); 

}



//文件上传

<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: $nextMonday = $time+86400;break;//星期天则加一天

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

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

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

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

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

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

}

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



//逐行读取文件指定行数的内容：

function getRowData($file, $row = 0, mark = false){

    $fhandle = fopen($file,'rb');

    $row = ($row == 0)? filesize($file) : $row;

    while($row >0 && !feof($fhandle)){

       $data[] = (mark)? fgets($fhandle) : fgetss($fhandle);

       $row--;

    }

    fclose($fhandle);

}



//读取文件指定字符长度

function getLetterData($file, $num = 0, mark = false){

    $fhandle = fopen($file,'rb');

    $row = ($num)? filesize($file) : $num;

    $data = fread($fhandle, $num);

    fclose($fhandle);

}

//删除目录中在数据库中没有记录的图片

public function delImg($data, $dir = '.'){

    $files = scandir($dir);

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

    foreach($delFiles as $name){

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

        unlink($file);

        echo $file.'<br/>';

    }

}

 

ch_json_encode