46 very useful snippets of PHP code (III)

31. Delete Folder Contents

[Code]php Code:

function Delete ($path) {    if (is_dir ($path) = = = True)    {        $files = Array_diff (Scandir ($path), Array ('. ', '. '));        foreach ($files as $file)        {            Delete (Realpath ($path). '/' . $file);        }        return rmdir ($path);    }    else if (is_file ($path) = = = True)    {        return unlink ($path);    }    return false;}

Grammar:

<?php

$path = "images/";

Delete ($path); This would delete images folder along with its contents.

?>

32. Search and Highlight keywords in a string

[Code]php Code:

function Highlighter_text ($text, $words) {    $split _words = Explode ("", $words);    foreach ($split _words as $word)    {        $color = "#4285F4";        $text = Preg_replace ("| ( $word) | Ui ",            " <b>$1</b> ", $text);    }    return $text;}

Grammar:

<?php

$string = "I like chocolates and I like apples";

$words = "Apple";

Echo Highlighter_text ($string, $words);

?>

33. Writing Files

<?

$filename = ' blog.csv ';

$fp = fopen ($filename, ' w ');

$output = "Hello";

$output. = "world!";

$output. = "\ r \ n";

Fputs ($fp, $output);

Fclose ($FP);

?>

34. Download the picture according to the URL

[Code]php Code:

function Imagefromurl ($image, $rename) {$ch = Curl_init ($image); curl_setopt ($ch, Curlopt_header, 0); curl_setopt ($ch, Curlopt_returntransfer, 1); curl_setopt ($ch, curlopt_binarytransfer,1), $rawdata =curl_exec ($ch); Curl_close ($ch); $ fp = fopen ("$rename", ' W '); fwrite ($fp, $rawdata); Fclose ($FP);}

Grammar:

<?php

$url = "Http://koonk.com/images/logo.png";

$rename = "Koonk.png";

Imagefromurl ($url, $rename);

?>

35. Detect if the URL is valid

[Code]php Code:

function Isvalidurl ($url) {$check = 0;if (Filter_var ($url, Filter_validate_url)!== false) {  $check = 1;} return $check;}

Grammar:

<?php

$url = "http://koonk.com";

$check = Checkvalidurl ($url);

Echo $check; If returns 1 then URLs is valid.

?>

36. Generate two-dimensional code

[Code]php Code:

function Qr_code ($data, $type = "TXT", $size = ' Max ', $ec = ' L ', $margin = ' 0 ')  {     $types = array ("URL" =--> "HTTP +/ "," tel "and" Tel: "," TXT "=" "," EMAIL "and" MAILTO: ");    if (!in_array ($type, Array ("URL", "TEL", "txt", "EMAIL"))))    {        $type = "txt";    }    if (!preg_match ('/^ '. $types [$type]. ' /', $data))    {        $data = str_replace ("\ \", "", $types [$type]). $data;    }    $ch = Curl_init ();    $data = UrlEncode ($data);    curl_setopt ($ch, Curlopt_url, ' Http://chart.apis.google.com/chart ');    curl_setopt ($ch, Curlopt_post, true);    curl_setopt ($ch, Curlopt_postfields, ' chs= '. $size. ' x '. $size. ' &cht=qr&chld= '. $ec. ' | '. $margin. ' &chl= '. $data);    curl_setopt ($ch, Curlopt_returntransfer, true);    curl_setopt ($ch, Curlopt_header, false);    curl_setopt ($ch, Curlopt_timeout,);    $response = curl_exec ($ch);    Curl_close ($ch);    return $response;}

Grammar:

<?php

Header ("Content-type:image/png");

Echo Qr_code ("http://koonk.com", "URL");

?>

37. Calculate the distance between the two map coordinates

[Code]php Code:

function Getdistancebetweenpointsnew ($latitude 1, $longitude 1, $latitude 2, $longitude 2) {    $theta = $longitude 1-$ Longitude2;    $miles = (sin (Deg2rad ($latitude 1)) * Sin (Deg2rad ($latitude 2)) + (cos (Deg2rad ($latitude 1)) * cos (Deg2rad ($latitude 2)) * Cos (Deg2rad ($theta)));    $miles = ACOs ($miles);    $miles = Rad2deg ($miles);    $miles = $miles * 1.1515;    $feet = $miles * 5280;    $yards = $feet/3;    $kilometers = $miles * 1.609344;    $meters = $kilometers *;    Return compact (' Miles ', ' feet ', ' yards ', ' kilometers ', ' meters '); }

Grammar:

<?php

$point 1 = Array (' lat ' = = 40.770623, ' long ' =-73.964367);

$point 2 = Array (' lat ' = = 40.758224, ' long ' =-73.917404);

$distance = getdistancebetweenpointsnew ($point 1[' lat '), $point 1[' long '], $point 2[' lat '), $point 2[' long ']);

foreach ($distance as $unit = = $value) {

echo $unit. ': '. Number_format ($value, 4). ' <br/> ';

}

?>

38. Get all Tweets for a specific topic tag

[Code]php Code:

function Gettweets ($hash _tag) {$url = ' http://search.twitter.com/search.atom?q= '. UrlEncode ($hash _tag);    echo "<p>connecting to <strong> $url </strong> ...</p>";    $ch = Curl_init ($url);    curl_setopt ($ch, Curlopt_returntransfer, TRUE);    $xml = curl_exec ($ch);    Curl_close ($ch);    If you want to see the response from Twitter, uncomment this next part out://echo "<p>Response:</p>"; echo "<pre>". Htmlspecialchars ($xml). "    </pre> ";    $affected = 0; $twelement = new <a href= "http://www.php-z.com/" target= "_blank" class= "Relatedlink" >Simple</a>    XMLElement ($xml);        foreach ($twelement->entry as $entry) {$text = Trim ($entry->title);        $author = Trim ($entry->author->name);        $time = Strtotime ($entry->published);        $id = $entry->id; echo "<p>tweet from". $author. ": <strong>". $text. " </strong> <em>posted ". Date (' n/j/y g:i a ', $time)." </em&Gt;</p> "; } return true;

39. Add Th,st,nd or Rd as the number suffix

Friday the 13th

[Code]php Code:

function ordinal ($CDNL) {     $test _c = ABS ($CDNL)%;     $ext = (ABS ($CDNL)%100 < && abs ($CDNL)%100 > 4)? ' th '            : (($test _c < 4)? ($test _c < 3)? ($test _c < 2)? ($test _c < 1)             ? ' th ': ' st ': ' nd ': ' rd ': ' th ');     return $CDNL. $ext; }

Grammar:

<?php

$number = 10;

echo ordinal ($number); Output is 10th

?>

40. Limit the speed of file downloads

[Code]php Code:

<!--? php//Local file that should is send to the Client$local_file = ' test-file.zip ';//filename that the user gets as  Default$download_file = ' 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);        Flush content flush ();        Open file Stream $file = fopen ($local _file, "R");  while (!feof ($file)) {//Send the current file part to the browser print fread ($file, round ($download _rate              * 1024));          Flush the content to the browser flush ();        Sleep One Second sleep (1); }//Close file stream fclose ($file);} else {die (' error:the file '. $local _file. ' does not exist! ');}? >

41. Convert Text to Images

<?php

Header ("Content-type:image/png");

$string = $_get[' text '];

$im = Imagecreatefrompng ("Images/button.png");

$color = Imagecolorallocate ($im, 255, 255, 255);

$PX = (Imagesx ($im)-7.5 * strlen ($string))/2;

$py = 9;

$fontSize = 1;

Imagestring ($im, FontSize, $px, $py, $string, $color);

Imagepng ($im);

Imagedestroy ($im);

?>

42. Get the remote file size

[Code]php Code:

function Remote_filesize ($url, $user = "", $PW = "") {    ob_start ();    $ch = Curl_init ($url);    curl_setopt ($ch, Curlopt_header, 1);    curl_setopt ($ch, curlopt_nobody, 1);    if (!empty ($user) &&!empty ($PW))    {        $headers = array (' Authorization:basic ').  <a href= "http://www.php-z.com/" target= "_blank" class= "Relatedlink" >base</a>64_encode ("$user: $PW"));        curl_setopt ($ch, Curlopt_httpheader, $headers);    }    $ok = curl_exec ($ch);    Curl_close ($ch);    $head = Ob_get_contents ();    Ob_end_clean ();    $regex = '/content-length:\s ([0-9].+?) \s/';    $count = Preg_match ($regex, $head, $matches);    return Isset ($matches [1])? $matches [1]: "Unknown";}

Grammar:

<?php

$file = "Http://koonk.com/images/logo.png";

$size = Remote_filesize ($url);

Echo $size;

?>

43. Convert PDF to image using Imagebrick

<?php

$pdf _file = './pdf/demo.pdf ';

$save _to = './jpg/demo.jpg '; Make sure that Apache have permissions to write on this folder! (Common problem)

Execute ImageMagick command ' convert ' and convert PDF to JPG with applied settings

EXEC (' Convert '. $pdf _file. ' "-colorspace rgb-resize" '. $save _to. ' "', $output, $return _var);

if ($return _var = = 0) {//if exec successfuly converted PDF to JPG

print "Conversion OK";

}

else print "Conversion failed.<br/>". $output;

?>

44. Generate Short URLs using TinyURL

[Code]php Code:

function Get_tiny_url ($url)  {      $ch = Curl_init ();      $timeout = 5;      curl_setopt ($ch, Curlopt_url, ' http://tinyurl.com/api-create.php?url= '. $url);      curl_setopt ($ch, curlopt_returntransfer,1);      curl_setopt ($ch, Curlopt_connecttimeout, $timeout);      $data = curl_exec ($ch);      Curl_close ($ch);      return $data;  }

Grammar:

<?php

$url = "Http://blog.koonk.com/2015/07/Hello-World";

$tinyurl = Get_tiny_url ($url);

Echo $tinyurl;

?>

YouTube Download Chain Builder

Use the PHP snippet below to get your users to download Youtube videos

[Code]php Code:

function Str_between ($string, $start, $end) {$string = "". $string; $ini = Strpos ($string, $start); if ($ini = = 0) return ""; $ini + = strlen ($start); $len = Strpos ($string, $end, $ini)-$ini; Return substr ($string, $ini, $len);    }function Get_youtube_download_link () {$youtube _link = $_get[' YouTube ');    $youtube _page = file_get_contents ($youtube _link);    $v _id = Str_between ($youtube _page, "&video_id=", "&");    $t _id = Str_between ($youtube _page, "&t=", "&");    $flv _link = "http://www.youtube.com/get_video?video_id= $v _id&t= $t _id";    $HQ _flv_link = "http://www.youtube.com/get_video?video_id= $v _id&t= $t _id&fmt=6";    $MP 4_link = "http://www.youtube.com/get_video?video_id= $v _id&t= $t _id&fmt=18";    $THREEGP _link = "http://www.youtube.com/get_video?video_id= $v _id&t= $t _id&fmt=17";    echo "\t\tdownload (right-click > Save As): \n\t\t";    echo "<a href=" \ "$flv _link\" ">flv</a>\n\t\t"; echo "<a href=" \ "$hq _flv_link\" ">hq flv (if Available) </a>\n\t\t ";    echo "<a href=" \ "$mp 4_link\" ">mp4</a>\n\t\t"; echo "<a href=" \ "$THREEGP _link\" ">3gp</a><br><br>\n";}

The time stamp of Facebook style

Facebook (x mins age, Y hours ago etc)

[Code]php Code:

function Nicetime ($date) {if (empty ($date)) {return "No date provided";    } $periods = Array ("Second", "Minute", "Hour", "Day", "Week", "Month", "year", "decade");         $lengths = Array ("60", "60", "24", "7", "4.35", "12", "10");    $now = time ();            $unix _date = Strtotime ($date);    Check validity of date if (empty ($unix _date)) {return "Bad date";        }//Is it the future date or past date if ($now > $unix _date) {$difference = $now-$unix _date;             $tense = "Ago";        } else {$difference = $unix _date-$now;    $tense = "from"; } for ($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] {$tense}";}

Grammar:

<?php

$date = "2015-07-05 03:45";

$result = Nicetime ($date); 2 days ago

?>

The above is 46 very useful PHP code fragment (three) of the content, more relevant content please pay attention to topic.alibabacloud.com (www.php.cn)!

