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10个超级有用值得收藏的PHP代码片段

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WBOYOriginal
2016-06-06 20:12:551037browse

这篇文章主要介绍了10个超级有用值得收藏的PHP代码片段,本文讲解了黑名单过滤、随机颜色生成器、从网络下载文件、强制下载文件、通过Email显示用户的Gravatar头

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。

网上有人总结几种编程语言的特点,我觉得也挺有道理的:

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

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。

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;
}

$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


二、随机颜色生成器

复制代码 代码如下:


function randomColor() {
    $str = '#';
    for($i = 0 ; $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();


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 = '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);
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('~

10个超级有用值得收藏的PHP代码片段(.+?)
~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:

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