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您的位置:威尼斯手机平台登陆 > 最新文章 > 四、抑遏下载文件,PHP是世上网址开垦中使用率最高的编制程序语言

四、抑遏下载文件,PHP是世上网址开垦中使用率最高的编制程序语言

发布时间:2020-04-21 16:06编辑:最新文章浏览(85)

    本文将介绍10个经常会用到的PHP代码片段,包括黑名单过滤、随机颜色生成器、从网上下载文件、Alexa/Google Page Rank、强制下载文件、用Email显示用户的Gravator头像、用cURL获取RSS订阅数、截取图片、检查网站是否宕机。

    尽管PHP经常被人诟病,被人贬低,被人当玩笑开,事实证明,PHP是全世界网站开发中使用率最高的编程语言。PHP最大的缺点是太简单,语法不严谨,框架体系很弱,但这也是它最大的优点,一个有点编程背景的普通人,只需要学习PHP半天时间,就可以上手开始开发web应用了。

    一、黑名单过滤

    图片 1

    网上有人总结几种编程语言的特点,我觉得也挺有道理的:

    function is_spam($text, $file, $split = ':', $regex = false){ $handle = fopen; $contents = fread($handle, filesize; fclose; $lines = explode; $arr = array(); foreach{ list = explode; if $arr[$word] = $count; else $arr[preg_quote] = $count; } preg_match_all("~".implode)."~", $text, $matches); $temp = array(); foreach($matches[0] as $match){ if(!in_array{ $temp[$match] = $temp[$match] + 1; if($temp[$match] >= $arr[$word]) return true; } } return false; } $file = 'spam.txt'; $str = 'This string has cat, dog word'; if echo 'this is spam'; else echo 'this is not spam'; ab:3 dog:3 cat:2 monkey:2 
    

    一、黑名单过滤

    function is_spam($text, $file, $split = ':', $regex = false){ 
        $handle = fopen($file, 'rb'); 
        $contents = fread($handle, filesize($file)); 
        fclose($handle); 
        $lines = explode("n", $contents); 
    $arr = array(); 
    foreach($lines as $line){ 
    list($word, $count) = explode($split, $line); 
    if($regex) 
    $arr[$word] = $count; 
    else 
    $arr[preg_quote($word)] = $count; 
    } 
    preg_match_all("~".implode('|', array_keys($arr))."~", $text, $matches); 
    $temp = array(); 
    foreach($matches[0] as $match){ 
    if(!in_array($match, $temp)){ 
    $temp[$match] = $temp[$match] + 1; 
    if($temp[$match] >= $arr[$word]) 
    return true; 
    } 
    } 
    return false; 
    } 
    
    $file = 'spam.txt'; 
    $str = 'This string has cat, dog word'; 
    if(is_spam($str, $file)) 
    echo 'this is spam'; 
    else 
    echo 'this is not spam'; 
    
    ab:3 
    dog:3 
    cat:2 
    monkey:2
    

    复制代码 代码如下:
    PHP 就是: Quick and Dirty
    Java 就是: Beauty and Slowly
    Ruby 就是: Quick and Beauty
    python 就是: Quick and Simple

    二、随机颜色生成器

    二、随机颜色生成器

    function randomColor() { 
        $str = '#'; 
        for($i = 0 ; $i < 6 ; $i++) { 
            $randNum = rand(0 , 15); 
            switch ($randNum) { 
                case 10: $randNum = 'A'; break; 
                case 11: $randNum = 'B'; break; 
                case 12: $randNum = 'C'; break; 
                case 13: $randNum = 'D'; break; 
                case 14: $randNum = 'E'; break; 
                case 15: $randNum = 'F'; break; 
            } 
            $str .= $randNum; 
        } 
        return $str; 
    } 
    $color = randomColor();
    

    在PHP的流行普及中,网上总结出了很多实用的PHP代码片段,这些代码片段在当你遇到类似的问题时,粘贴过去就可以使用,非常的高效,非常的省时省力。将这些程序员前辈总结出的优秀代码放到自己的知识库中,是一个善于学习的程序员的好习惯。

    function randomColor() { $str = '#'; for($i = 0 ; $i < 6 ; $i++) { $randNum = rand; switch  { case 10: $randNum = 'A'; break; case 11: $randNum = 'B'; break; case 12: $randNum = 'C'; break; case 13: $randNum = 'D'; break; case 14: $randNum = 'E'; break; case 15: $randNum = 'F'; break; } $str .= $randNum; } return $str; } $color = randomColor(); 
    

    三、从网上下载文件

    set_time_limit(0); 
    // Supports all file types 
    // URL Here: 
    $url = 'http://somsite.com/some_video.flv'; 
    $pi = pathinfo($url); 
    $ext = $pi['extension']; 
    $name = $pi['filename']; 
    
    // create a new cURL resource 
    $ch = curl_init(); 
    
    // set URL and other appropriate options 
    curl_setopt($ch, CURLOPT_URL, $url); 
    curl_setopt($ch, CURLOPT_HEADER, false); 
    curl_setopt($ch, CURLOPT_BINARYTRANSFER, true); 
    curl_setopt($ch, CURLOPT_AUTOREFERER, true); 
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true); 
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); 
    
    // grab URL and pass it to the browser 
    $opt = curl_exec($ch); 
    
    // close cURL resource, and free up system resources 
    curl_close($ch); 
    
    $saveFile = $name.'.'.$ext; 
    if(preg_match("/[^0-9a-z._-]/i", $saveFile)) 
    $saveFile = md5(microtime(true)).'.'.$ext; 
    
    $handle = fopen($saveFile, 'wb'); 
    fwrite($handle, $opt); 
    fclose($handle);
    

    一、黑名单过滤 复制代码 代码如下:
    function is_spam($text, $file, $split = ':', $regex = false){
        $handle = fopen($file, 'rb');
        $contents = fread($handle, filesize($file));
        fclose($handle);
        $lines = explode("n", $contents);
        $arr = array();
        foreach($lines as $line){
            list($word, $count) = explode($split, $line);
            if($regex)
                $arr[$word] = $count;
            else
                $arr[preg_quote($word)] = $count;
        }
        preg_match_all("~".implode('|', array_keys($arr))."~", $text, $matches);
        $temp = array();
        foreach($matches[0] as $match){
            if(!in_array($match, $temp)){
                $temp[$match] = $temp[$match] + 1;
                if($temp[$match] >= $arr[$word])
                    return true;
            }
        }
        return false;
    }

    三、从网上下载文件

    四、Alexa/Google Page Rank

    function page_rank($page, $type = 'alexa'){ 
    switch($type){ 
    case 'alexa': 
    $url = 'http://alexa.com/siteinfo/'; 
    $handle = fopen($url.$page, 'r'); 
    break; 
    case 'google': 
    $url = 'http://google.com/search?client=navclient-auto&ch=6-1484155081&features=Rank&q=info:'; 
    $handle = fopen($url.'http://'.$page, 'r'); 
    break; 
    } 
    $content = stream_get_contents($handle); 
    fclose($handle); 
    $content = preg_replace("~(n|t|ss+)~",'', $content); 
    switch($type){ 
    case 'alexa': 
    if(preg_match('~<div class="data (down|up)"><img.+?>(.+?) </div>~im',$content,$matches)){ 
    return $matches[2]; 
    }else{ 
    return FALSE; 
    } 
    break; 
    case 'google': 
    $rank = explode(':',$content); 
    if($rank[2] != '') 
    return $rank[2]; 
    else 
    return FALSE; 
    break; 
    default: 
    return FALSE; 
    break; 
    } 
    } 
    // Alexa Page Rank: 
    echo 'Alexa Rank: '.page_rank('techug.com'); 
    echo ' '; 
    // Google Page Rank 
    echo 'Google Rank: '.page_rank('techug.com', 'google');
    

    $file = 'spam.txt';
    $str = 'This string has cat, dog word';
    if(is_spam($str, $file))
        echo 'this is spam';
    else
        echo 'this is not spam';
    ab:3
    dog:3
    cat:2
    monkey:2

    set_time_limit; // Supports all file types // URL Here: $url = 'http://somsite.com/some_video.flv'; $pi = pathinfo; $ext = $pi['extension']; $name = $pi['filename']; // create a new cURL resource $ch = curl_init(); // set URL and other appropriate options curl_setopt($ch, CURLOPT_URL, $url); curl_setopt($ch, CURLOPT_HEADER, false); curl_setopt($ch, CURLOPT_BINARYTRANSFER, true); curl_setopt($ch, CURLOPT_AUTOREFERER, true); curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true); curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); // grab URL and pass it to the browser $opt = curl_exec; // close cURL resource, and free up system resources curl_close; $saveFile = $name.'.'.$ext; if(preg_match("/[^0-9a-z._-]/i", $saveFile)) $saveFile = md5.'.'.$ext; $handle = fopen; fwrite; fclose; 
    

    五、强制下载文件

    $filename = $_GET['file']; //Get the fileid from the URL 
    // Query the file ID 
    $query = sprintf("SELECT * FROM tableName WHERE id = '%s'",mysql_real_escape_string($filename)); 
    $sql = mysql_query($query); 
    if(mysql_num_rows($sql) > 0){ 
    $row = mysql_fetch_array($sql); 
    // Set some headers 
    header("Pragma: public"); 
    header("Expires: 0"); 
    header("Cache-Control: must-revalidate, post-check=0, pre-check=0"); 
    header("Content-Type: application/force-download"); 
    header("Content-Type: application/octet-stream"); 
    header("Content-Type: application/download"); 
    header("Content-Disposition: attachment; filename=".basename($row['FileName']).";"); 
    header("Content-Transfer-Encoding: binary"); 
    header("Content-Length: ".filesize($row['FileName'])); 
    
    @readfile($row['FileName']); 
    exit(0); 
    }else{ 
    header("Location: /"); 
    exit; 
    }
    

    二、随机颜色生成器 复制代码 代码如下:
    function randomColor() {
        $str = '#';
        for($i = 0 ; $i < 6 ; $i++) {
            $randNum = rand(0 , 15);
            switch ($randNum) {
                case 10: $randNum = 'A'; break;
                case 11: $randNum = 'B'; break;
                case 12: $randNum = 'C'; break;
                case 13: $randNum = 'D'; break;
                case 14: $randNum = 'E'; break;
                case 15: $randNum = 'F'; break;
            }
            $str .= $randNum;
        }
        return $str;
    }
    $color = randomColor();

    四、强制下载文件

    六、用Email显示用户的Gravator头像

    $gravatar_link = 'http://www.gravatar.com/avatar/' . md5($comment_author_email) . '?s=32'; 
    echo '<img src="' . $gravatar_link . '" />';
    

    三、从网络下载文件 复制代码 代码如下:
    set_time_limit(0);
    // Supports all file types
    // URL Here:
    $url = '';
    $pi = pathinfo($url);
    $ext = $pi['extension'];
    $name = $pi['filename'];

    $filename = $_GET['file']; //Get the fileid from the URL // Query the file ID $query = sprintf("SELECT * FROM tableName WHERE id = '%s'",mysql_real_escape_string; $sql = mysql_query; if > 0){ $row = mysql_fetch_array; // Set some headers header; header; header("Cache-Control: must-revalidate, post-check=0, pre-check=0"); header("Content-Type: application/force-download"); header("Content-Type: application/octet-stream"); header("Content-Type: application/download"); header("Content-Disposition: attachment; filename=".basename.";"); header("Content-Transfer-Encoding: binary"); header("Content-Length: ".filesize; @readfile; exit; }else{ header; exit; } 
    

    七、用cURL获取RSS订阅数

    $ch = curl_init(); 
    curl_setopt($ch,CURLOPT_URL,'https://feedburner.google.com/api/awareness/1.0/GetFeedData?id=7qkrmib4r9rscbplq5qgadiiq4'); 
    curl_setopt($ch,CURLOPT_RETURNTRANSFER,1); 
    curl_setopt($ch,CURLOPT_CONNECTTIMEOUT,2); 
    $content = curl_exec($ch); 
    $subscribers = get_match('/circulation="(.*)"/isU',$content); 
    curl_close($ch); 
    
    八、时间差异计算 
    
    function ago($time) 
    { 
       $periods = array("second", "minute", "hour", "day", "week", "month", "year", "decade"); 
    $lengths = array("60","60","24","7","4.35","12","10"); 
    
    $now = time(); 
    
    $difference = $now - $time; 
    $tense = "ago"; 
    
    for($j = 0; $difference >= $lengths[$j] && $j < count($lengths)-1; $j++) { 
    $difference /= $lengths[$j]; 
    } 
    
    $difference = round($difference); 
    
    if($difference != 1) { 
    $periods[$j].= "s"; 
    } 
    
    return "$difference $periods[$j] 'ago' "; 
    }
    

    // create a new cURL resource
    $ch = curl_init();

    五、截取图片

    九、截取图片

    $filename= "test.jpg"; 
    list($w, $h, $type, $attr) = getimagesize($filename); 
    $src_im = imagecreatefromjpeg($filename); 
    
    $src_x = '0'; // begin x 
    $src_y = '0'; // begin y 
    $src_w = '100'; // width 
    $src_h = '100'; // height 
    $dst_x = '0'; // destination x 
    $dst_y = '0'; // destination y 
    
    $dst_im = imagecreatetruecolor($src_w, $src_h); 
    $white = imagecolorallocate($dst_im, 255, 255, 255); 
    imagefill($dst_im, 0, 0, $white); 
    
    imagecopy($dst_im, $src_im, $dst_x, $dst_y, $src_x, $src_y, $src_w, $src_h); 
    
    header("Content-type: image/png"); 
    imagepng($dst_im); 
    imagedestroy($dst_im);
    

    // set URL and other appropriate options
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_HEADER, false);
    curl_setopt($ch, CURLOPT_BINARYTRANSFER, true);
    curl_setopt($ch, CURLOPT_AUTOREFERER, true);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

    $filename= "test.jpg"; list = getimagesize; $src_im = imagecreatefromjpeg; $src_x = '0'; // begin x $src_y = '0'; // begin y $src_w = '100'; // width $src_h = '100'; // height $dst_x = '0'; // destination x $dst_y = '0'; // destination y $dst_im = imagecreatetruecolor; $white = imagecolorallocate($dst_im, 255, 255, 255); imagefill($dst_im, 0, 0, $white); imagecopy($dst_im, $src_im, $dst_x, $dst_y, $src_x, $src_y, $src_w, $src_h); header("Content-type: image/png"); imagepng; imagedestroy; 
    

    十、检查网站是否宕机

    function Visit($url){ 
           $agent = "Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)";$ch=curl_init(); 
    curl_setopt ($ch, CURLOPT_URL,$url ); 
    curl_setopt($ch, CURLOPT_USERAGENT, $agent); 
    curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1); 
    curl_setopt ($ch,CURLOPT_VERBOSE,false); 
    curl_setopt($ch, CURLOPT_TIMEOUT, 5); 
    curl_setopt($ch,CURLOPT_SSL_VERIFYPEER, FALSE); 
    curl_setopt($ch,CURLOPT_SSLVERSION,3); 
    curl_setopt($ch,CURLOPT_SSL_VERIFYHOST, FALSE); 
    $page=curl_exec($ch); 
    //echo curl_error($ch); 
    $httpcode = curl_getinfo($ch, CURLINFO_HTTP_CODE); 
    curl_close($ch); 
    if($httpcode>=200 && $httpcode<300) return true; 
    else return false; 
    } 
    if (Visit("http://www.google.com")) 
    echo "Website OK"."n"; 
    else 
    echo "Website DOWN";
    

    // grab URL and pass it to the browser
    $opt = curl_exec($ch);

    六、检查网站是否宕机

    // close cURL resource, and free up system resources
    curl_close($ch);

    function Visit{ $agent = "Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)";$ch=curl_init(); curl_setopt ($ch, CURLOPT_URL,$url ); curl_setopt($ch, CURLOPT_USERAGENT, $agent); curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt ($ch,CURLOPT_VERBOSE,false); curl_setopt($ch, CURLOPT_TIMEOUT, 5); curl_setopt($ch,CURLOPT_SSL_VERIFYPEER, FALSE); curl_setopt($ch,CURLOPT_SSLVERSION,3); curl_setopt($ch,CURLOPT_SSL_VERIFYHOST, FALSE); $page=curl_exec; //echo curl_error; $httpcode = curl_getinfo($ch, CURLINFO_HTTP_CODE); curl_close; if($httpcode>=200 && $httpcode<300) return true; else return false; } if (Visit("http://www.google.com")) echo "Website OK"."n"; else echo "Website DOWN"; 
    

    $saveFile = $name.'.'.$ext;
    if(preg_match("/[^0-9a-z._-]/i", $saveFile))
        $saveFile = md5(microtime(true)).'.'.$ext;

    以上就是6个超实用的PHP代码样例,希望对大家学习PHP编程有所帮助,果断收藏吧

    $handle = fopen($saveFile, 'wb');
    fwrite($handle, $opt);
    fclose($handle);
    四、Alexa/Google Page Rank

    function page_rank($page, $type = 'alexa'){
        switch($type){
            case 'alexa':
                $url = '';
                $handle = fopen($url.$page, 'r');
            break;
            case 'google':
                $url = ':';
                $handle = fopen($url.', 'r');
            break;
        }
        $content = stream_get_contents($handle);
        fclose($handle);
        $content = preg_replace("~(n|t|ss+)~",'', $content);
        switch($type){
            case 'alexa':
                if(preg_match('~(.+?) <>~im',$content,$matches)){
                    return $matches[2];
                }else{
                    return FALSE;
                }
            break;
            case 'google':
                $rank = explode(':',$content);
                if($rank[2] != '')
                    return $rank[2];
                else
                    return FALSE;
            break;
            default:
                return FALSE;
            break;
        }
    }
    // Alexa Page Rank:
    echo 'Alexa Rank: '.page_rank('techug.com');
    echo '
    ';
    // Google Page Rank
    echo 'Google Rank: '.page_rank('techug.com', 'google');

    五、强制下载文件 复制代码 代码如下:
    $filename = $_GET['file']; //Get the fileid from the URL
    // Query the file ID
    $query = sprintf("SELECT * FROM tableName WHERE id = '%s'",mysql_real_escape_string($filename));
    $sql = mysql_query($query);
    if(mysql_num_rows($sql) > 0){
        $row = mysql_fetch_array($sql);
        // Set some headers
        header("Pragma: public");
        header("Expires: 0");
        header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
        header("Content-Type: application/force-download");
        header("Content-Type: application/octet-stream");
        header("Content-Type: application/download");
        header("Content-Disposition: attachment; filename=".basename($row['FileName']).";");
        header("Content-Transfer-Encoding: binary");
        header("Content-Length: ".filesize($row['FileName']));

        @readfile($row['FileName']);
        exit(0);
    }else{
        header("Location: /");
        exit;
    }

    六、通过Email显示用户的Gravatar头像 复制代码 代码如下:
     $gravatar_link = '' . md5($comment_author_email) . '?s=32';
      echo '图片 2';

    七、通过cURL获取RSS订阅数 复制代码 代码如下:
    $ch = curl_init();
    curl_setopt($ch,CURLOPT_URL,'');
    curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
    curl_setopt($ch,CURLOPT_CONNECTTIMEOUT,2);
    $content = curl_exec($ch);
    $subscribers = get_match('/circulation="(.*)"/isU',$content);
    curl_close($ch);

    八、时间差异计算函数 复制代码 代码如下:
    function ago($time)
    {
       $periods = array("second", "minute", "hour", "day", "week", "month", "year", "decade");
       $lengths = array("60","60","24","7","4.35","12","10");

       $now = time();

           $difference     = $now - $time;
           $tense         = "ago";

       for($j = 0; $difference >= $lengths[$j] && $j < count($lengths)-1; $j++) {
           $difference /= $lengths[$j];
       }

       $difference = round($difference);

       if($difference != 1) {
           $periods[$j].= "s";
       }

       return "$difference $periods[$j] 'ago' ";
    }

    九、裁剪图片 复制代码 代码如下:
    $filename= "test.jpg";
    list($w, $h, $type, $attr) = getimagesize($filename);
    $src_im = imagecreatefromjpeg($filename);

    $src_x = '0';   // begin x
    $src_y = '0';   // begin y
    $src_w = '100'; // width
    $src_h = '100'; // height
    $dst_x = '0';   // destination x
    $dst_y = '0';   // destination y

    $dst_im = imagecreatetruecolor($src_w, $src_h);
    $white = imagecolorallocate($dst_im, 255, 255, 255);
    imagefill($dst_im, 0, 0, $white);

    imagecopy($dst_im, $src_im, $dst_x, $dst_y, $src_x, $src_y, $src_w, $src_h);

    header("Content-type: image/png");
    imagepng($dst_im);
    imagedestroy($dst_im);

    十、检查网站是否宕机 复制代码 代码如下:
    function Visit($url){
           $agent = "Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)";$ch=curl_init();
           curl_setopt ($ch, CURLOPT_URL,$url );
           curl_setopt($ch, CURLOPT_USERAGENT, $agent);
           curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
           curl_setopt ($ch,CURLOPT_VERBOSE,false);
           curl_setopt($ch, CURLOPT_TIMEOUT, 5);
           curl_setopt($ch,CURLOPT_SSL_VERIFYPEER, FALSE);
           curl_setopt($ch,CURLOPT_SSLVERSION,3);
           curl_setopt($ch,CURLOPT_SSL_VERIFYHOST, FALSE);
           $page=curl_exec($ch);
           //echo curl_error($ch);
           $httpcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
           curl_close($ch);
           if($httpcode>=200 && $httpcode<300) return true;
           else return false;
    }
    if (Visit(""))
           echo "Website OK"."n";
    else
           echo "Website DOWN";

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