46 useful PHP code snippets (3)

46 useful PHP code snippets (3)

31. delete folder content

[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;}

Syntax:

$ Path = "images /";

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

?>

32. search for and highlight keywords in strings

[Code] php code:

function highlighter_text($text, $words){    $split_words = explode( " " , $words );    foreach($split_words as $word)    {        $color = "#4285F4";        $text = preg_replace("|($word)|Ui" ,            "$1" , $text );    }    return $text;}

Syntax:

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

$ Words = "apple ";

Echo highlighter_text ($ string, $ words );

?>

33. write files

$ Filename = 'blog.csv ';

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

$ Output = "Hello ";

$ Output. = "World! ";

$ Output. = "\ r \ n ";

Fputs ($ fp, $ output );

Fclose ($ fp );

?>

34. download images based on URLs

[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);}

Syntax:

$ Url = "http://koonk.com/images/logo.png ";

$ Rename = "koonk.png ";

ImagefromURL ($ url, $ rename );

?>

35. check whether the URL is valid

[Code] php code:

function isvalidURL($url){$check = 0;if (filter_var($url, FILTER_VALIDATE_URL) !== false) {  $check = 1;}return $check;}

Syntax:

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

$ Check = checkvalidURL ($ url );

Echo $ check; // if returns 1 then URL is valid.

?>

36. generate a QR code

[Code] php code:

function qr_code($data, $type = "TXT", $size ='150', $ec='L', $margin='0')  {     $types = array("URL" =--> "http://", "TEL" => "TEL:", "TXT"=>"", "EMAIL" => "MAILTO:");    if(!in_array($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, 30);    $response = curl_exec($ch);    curl_close($ch);    return $response;}

Syntax:

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

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

?>

37. calculate the distance between two map coordinates

[Code] php code:

function getDistanceBetweenPointsNew($latitude1, $longitude1, $latitude2, $longitude2) {    $theta = $longitude1 - $longitude2;    $miles = (sin(deg2rad($latitude1)) * sin(deg2rad($latitude2))) + (cos(deg2rad($latitude1)) * cos(deg2rad($latitude2)) * cos(deg2rad($theta)));    $miles = acos($miles);    $miles = rad2deg($miles);    $miles = $miles * 60 * 1.1515;    $feet = $miles * 5280;    $yards = $feet / 3;    $kilometers = $miles * 1.609344;    $meters = $kilometers * 1000;    return compact('miles','feet','yards','kilometers','meters'); }

Syntax:

$ Point1 = array ('lat' => 40.770623, 'long' =>-73.964367 );

$ Point2 = array ('lat' => 40.758224, 'long' =>-73.917404 );

$ Distance = getDistanceBetweenPointsNew ($ point1 ['lat'], $ point1 ['long'], $ point2 ['lat'], $ point2 ['long']);

Foreach ($ distance as $ unit => $ value ){

Echo $ unit. ':'. number_format ($ value, 4 ).'
';

}

?>

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 "
Connecting to $url ...
";    $ch = curl_init($url);    curl_setopt ($ch, CURLOPT_RETURNTRANSFER, TRUE);    $xml = curl_exec ($ch);    curl_close ($ch);    //If you want to see the response from Twitter, uncomment this next part out:    //echo "
Response:
";    //echo "
".htmlspecialchars($xml)."
";    $affected = 0;    $twelement = new SimpleXMLElement($xml);    foreach ($twelement->entry as $entry) {        $text = trim($entry->title);        $author = trim($entry->author->name);        $time = strtotime($entry->published);        $id = $entry->id;        echo "
Tweet from ".$author.": ".$text."  Posted ".date('n/j/y g:i a',$time)."
";    }    return true ;}

39. add th, st, nd, or rd as the digit suffix.

Friday the 13th

[Code] php code:

function ordinal($cdnl){     $test_c = abs($cdnl) % 10;     $ext = ((abs($cdnl) %100 < 21 && 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; }

Syntax:

$ Number = 10;

Echo ordinal ($ number); // output is 10th

?>

40. restrict file download speed

[Code] php code:

  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 into images

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. obtain 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))    {        $headers = array('Authorization: Basic ' .  Base64_encode("$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";}

Syntax:

$ File = "http://koonk.com/images/logo.png ";

$ Size = remote_filesize ($ url );

Echo $ size;

?>

43. use imagebrick to convert pdf files to images

$ Export _file = './pdf/demoting ';

$ Save_to = './jpg/demo.jpg'; // make sure that Apache has permissions to write in this folder! (Common problem)

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

Exec ('convert "'. $ your _file.'"-colorspace RGB-resize 800 "'. $ save_to.'" ', $ output, $ return_var );

If ($ return_var = 0) {// if exec successfuly converted pdf to jpg

Print "Conversion OK ";

}

Else print "Conversion failed.
". $ Output;

?>

44. use tinyurl to generate short URLs

[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;  }

Syntax:

$ Url = "http://blog.koonk.com/2015/07/Hello-World ";

$ Tinyurl = get_tiny_url ($ url );

Echo $ tinyurl;

?>

45. youtube download link builder

You can use the following PHP snippets to download Youtube videos for your users.

[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";    $mp4_link = "http://www.youtube.com/get_video?video_id=$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 "FLV\n\t\t";    echo "HQ FLV (if available)\n\t\t";    echo "MP4\n\t\t";    echo "3GP

\n";}

46. Facebook-style timestamps

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($unix_date)) {            return "Bad date";    }    // is it future date or past date    if($now > $unix_date) {            $difference     = $now - $unix_date;        $tense         = "ago";             } else {        $difference     = $unix_date - $now;        $tense         = "from now";    }         for($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}";}

Syntax:

$ Date = ";

$ Result = nicetime ($ date); // 2 days ago

?>

The above are 46 useful PHP code snippets (3). For more information, see PHP Chinese website (www.php1.cn )!