PHP实用代码片段四

1. 删除文件夹内容

Delete( (() === = ((),('.','..' ( () . '/' . ( (() === (

语法：

= "images/"); ?>

2. 搜索和高亮字符串中的关键字

highlighter_text(, = ( " ",( = "#4285F4" = ("|()|Ui",".";\">$1",

语法：

= "I like chocolates and I like apples" = "apple" highlighter_text(,?>

3. 写入文件

= 'blog.csv' = (,'w' = " Hello " .= " World! " .= "\r\n"(,(?>

4. 根据 URL 下载图片

imagefromURL(, = curl_init(,CURLOPT_HEADER,0,CURLOPT_RETURNTRANSFER,1,CURLOPT_BINARYTRANSFER,1=curl_exec ( = ("",'w'(,(

语法：

= "http://koonk.com/images/logo.png" = "koonk.png",?>

5. 检测 URL 是否有效

isvalidURL( = 0 (filter_var(,FILTER_VALIDATE_URL) !== = 1

语法：

= "http://koonk.com" = checkvalidURL( ; ?>

6. 生成二维码

qr_code(, = "TXT", ='150',='L',='0' = ("URL" =--> "http://","TEL" => "TEL:","TXT"=>"","EMAIL" => "MAILTO:"(!(,("URL","TEL","TXT","EMAIL" = "TXT" (!('/^'.[].'/', = ("\\","",[]). = = (,CURLOPT_URL,'http://chart.apis.google.com/chart',CURLOPT_POST,,CURLOPT_POSTFIELDS,'chs='..'x'..'&cht=qr&chld='..'|'..'&chl='.,,CURLOPT_TIMEOUT,30 = curl_exec(

语法：

("Content-type: image/png" qr_code("http://koonk.com","URL"?>

7. 计算两个地图坐标之间的距离

getDistanceBetweenPointsNew(,,, = - = ((()) * (())) + ((()) * (()) * (( = ( = ( = * 60 * 1.1515 = * 5280 = / 3 = * 1.609344 = * 1000 ('miles','feet','yards','kilometers','meters'

语法：

= ('lat' => 40.770623,'long' => -73.964367 = ('lat' => 40.758224,'long' => -73.917404 = getDistanceBetweenPointsNew(['lat'],['long'],['lat'],['long' ( => .': '.(,4).'
'?>

8. 获取一个特定话题标签的所有 Tweets

getTweets( = 'http://search.twitter.com/search.atom?q='.( "

Connecting to ...

" = curl_init(, = curl_exec (Response:

"; //echo "

".htmlspecialchars($xml)."

"; = 0 = SimpleXMLElement( (->entry = (-> = (->author-> = (-> = -> "

Tweet from "..": ".." Posted ".('n/j/y g:i a',)."

9. 添加 th,st,nd 或者 rd 作为数字的后缀

ordinal( = () % 10 = ((() %100 < 21 && () %100 > 4) ? 'th' : (( < 4) ? ( < 3) ? ( < 2) ? ( < 1? 'th' : 'st' : 'nd' : 'rd' : 'th' .

语法：

= 10 ordinal(); ?>

10. 限制文件下载的速度

= 'test-file.zip' = 'your-download-name.zip'// set the download rate limit (=> 20,5 kb/s)
$download_rate = 20.5;
if(file_exists($local_file) && is_file($local_file)) {
// send headers
header('Cache-control: private');
header('Content-Type: application/octet-stream');
header('Content-Length: '.filesize($local_file));
header('Content-Disposition: filename='.$download_file);

</span><span style="color: #008000"&gt;//</span><span style="color: #008000"&gt; flush content</span>
<span style="color: #008080"&gt;flush</span><span style="color: #000000"&gt;();    
</span><span style="color: #008000"&gt;//</span><span style="color: #008000"&gt; open file stream</span>
<span style="color: #800080"&gt;$file</span> = <span style="color: #008080"&gt;fopen</span>(<span style="color: #800080"&gt;$local_file</span>,"r"<span style="color: #000000"&gt;);    
</span><span style="color: #0000ff"&gt;while</span>(!<span style="color: #008080"&gt;feof</span>(<span style="color: #800080"&gt;$file</span><span style="color: #000000"&gt;)) {

    </span><span style="color: #008000"&gt;//</span><span style="color: #008000"&gt; send the current file part to the browser</span>
    <span style="color: #0000ff"&gt;print</span> <span style="color: #008080"&gt;fread</span>(<span style="color: #800080"&gt;$file</span>,<span style="color: #008080"&gt;round</span>(<span style="color: #800080"&gt;$download_rate</span> * 1024<span style="color: #000000"&gt;));    

    </span><span style="color: #008000"&gt;//</span><span style="color: #008000"&gt; flush the content to the browser</span>
    <span style="color: #008080"&gt;flush</span><span style="color: #000000"&gt;();

    </span><span style="color: #008000"&gt;//</span><span style="color: #008000"&gt; sleep one second</span>
    <span style="color: #008080"&gt;sleep</span>(1<span style="color: #000000"&gt;);    
}    

</span><span style="color: #008000"&gt;//</span><span style="color: #008000"&gt; close file stream</span>
<span style="color: #008080"&gt;fclose</span>(<span style="color: #800080"&gt;$file</span><span style="color: #000000"&gt;);}

else {
die('Error: The file '.$local_file.' does not exist!');
}
?>

11. 把文本转换成图片

("Content-type: image/png" = ['text' = imagecreatefrompng("images/button.png" = imagecolorallocate(,255,255 = (imagesx() - 7.5 * ()) / 2 = 9 = 1,fontSize,,,,?>

12. 获取远程文件的大小

remote_filesize(, = "", = "" = curl_init(,1,CURLOPT_NOBODY,1(!() && !( = ('Authorization: Basic ' . (":",CURLOPT_HTTPHEADER, = curl_exec( = = '/Content-Length:\s([0-9].+?)\s/' = (,, ([1]) ? [1] : "unknown"

语法：

= "http://koonk.com/images/logo.png" = remote_filesize( ?>

13. 使用 imagebrick 进行 pdf 到图像的转换

= './pdf/demo.pdf' = './jpg/demo.jpg'; ('convert "'..'" -colorspace RGB -resize 800 "'..'"',,( == 0) { "Conversion OK" "Conversion failed.
".?>

14. 使用 tinyurl 生成短网址

get_tiny_url( = = 5,'http://tinyurl.com/api-create.php?url='.,1,CURLOPT_CONNECTTIMEOUT, = curl_exec(

语法：

= "http://blog.koonk.com/2015/07/Hello-World" = get_tiny_url( ?>

15. youtube 下载链接生成器

str_between(,, = " ".; = (,); ( == 0) ""; += (); = (,,) - ; (,, = ['youtube' = ( = str_between(,"&video_id=","&" = str_between(,"&t=","&" = "http://www.youtube.com/get_video?video_id=&t=" = "http://www.youtube.com/get_video?video_id=&t=&fmt=6" = "http://www.youtube.com/get_video?video_id=&t=&fmt=18" = "http://www.youtube.com/get_video?video_id=&t=&fmt=17" "\t\tDownload (right-click > save as):\n\t\t" "\">FLV\n\t\t" "\">HQ FLV (if available)\n\t\t" "\">MP4\n\t\t" "\">3GP

\n"

16. Facebook 样式的时间戳

Facebook (x mins age,y hours ago etc)

nicetime((( "No date provided"

</span><span style="color: #800080"&gt;$periods</span>         = <span style="color: #0000ff"&gt;array</span>("second","minute","hour","day","week","month","year","decade"<span style="color: #000000"&gt;);
</span><span style="color: #800080"&gt;$lengths</span>         = <span style="color: #0000ff"&gt;array</span>("60","60","24","7","4.35","12","10"<span style="color: #000000"&gt;);

</span><span style="color: #800080"&gt;$now</span>             = <span style="color: #008080"&gt;time</span><span style="color: #000000"&gt;();
</span><span style="color: #800080"&gt;$unix_date</span>         = <span style="color: #008080"&gt;strtotime</span>(<span style="color: #800080"&gt;$date</span><span style="color: #000000"&gt;);

   </span><span style="color: #008000"&gt;//</span><span style="color: #008000"&gt; check validity of date</span>
<span style="color: #0000ff"&gt;if</span>(<span style="color: #0000ff"&gt;empty</span>(<span style="color: #800080"&gt;$unix_date</span><span style="color: #000000"&gt;)) {    
    </span><span style="color: #0000ff"&gt;return</span> "Bad date"<span style="color: #000000"&gt;;
}
</span><span style="color: #008000"&gt;//</span><span style="color: #008000"&gt; is it future date or past date</span>
<span style="color: #0000ff"&gt;if</span>(<span style="color: #800080"&gt;$now</span> > <span style="color: #800080"&gt;$unix_date</span><span style="color: #000000"&gt;) {    
    </span><span style="color: #800080"&gt;$difference</span>     = <span style="color: #800080"&gt;$now</span> - <span style="color: #800080"&gt;$unix_date</span><span style="color: #000000"&gt;;
    </span><span style="color: #800080"&gt;$tense</span>         = "ago"<span style="color: #000000"&gt;;

} </span><span style="color: #0000ff"&gt;else</span><span style="color: #000000"&gt; {
    </span><span style="color: #800080"&gt;$difference</span>     = <span style="color: #800080"&gt;$unix_date</span> - <span style="color: #800080"&gt;$now</span><span style="color: #000000"&gt;;
    </span><span style="color: #800080"&gt;$tense</span>         = "from now"<span style="color: #000000"&gt;;
}

</span><span style="color: #0000ff"&gt;for</span>(<span style="color: #800080"&gt;$j</span> = 0; <span style="color: #800080"&gt;$difference</span> >= <span style="color: #800080"&gt;$lengths</span>[<span style="color: #800080"&gt;$j</span>] &amp;&amp; <span style="color: #800080"&gt;$j</span> < <span style="color: #008080"&gt;count</span>(<span style="color: #800080"&gt;$lengths</span>)-1; <span style="color: #800080"&gt;$j</span>++<span style="color: #000000"&gt;) {
    </span><span style="color: #800080"&gt;$difference</span> /= <span style="color: #800080"&gt;$lengths</span>[<span style="color: #800080"&gt;$j</span><span style="color: #000000"&gt;];
}

</span><span style="color: #800080"&gt;$difference</span> = <span style="color: #008080"&gt;round</span>(<span style="color: #800080"&gt;$difference</span><span style="color: #000000"&gt;);

</span><span style="color: #0000ff"&gt;if</span>(<span style="color: #800080"&gt;$difference</span> != 1<span style="color: #000000"&gt;) {
    </span><span style="color: #800080"&gt;$periods</span>[<span style="color: #800080"&gt;$j</span>].= "s"<span style="color: #000000"&gt;;
}

</span><span style="color: #0000ff"&gt;return</span> "<span style="color: #800080"&gt;$difference</span> <span style="color: #800080"&gt;$periods</span>[<span style="color: #800080"&gt;$j</span>] {<span style="color: #800080"&gt;$tense</span>}"<span style="color: #000000"&gt;;

}

语法：

= "2015-07-05 03:45" = nicetime(); ?>