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必须收藏的php实用代码片段

这篇文章主要为大家又分享了必须收藏的23个php实用代码片段,帮助大家更好地学习php程序设计,感兴趣的小伙伴们可以参考一下

在编写代码的时候有个神奇的工具总是好的!下面这里收集了 40+ PHP 代码片段,可以帮助你开发PHP 项目。 之前已经为大家分享了《必须收藏的23个php实用代码片段》。
这些PHP 片段对于PHP 初学者也非常有帮助,非常容易学习,让我们开始学习吧~

24. 从 PHP 数据创建 CSV 文件

 function generateCsv($data, $delimiter = ',', $enclosure = '"') { $handle = fopen('php://temp', 'r+'); foreach ($data as $line) { fputcsv($handle, $line, $delimiter, $enclosure); } rewind($handle); while (!feof($handle)) { $contents .= fread($handle, 8192); } fclose($handle); return $contents; } 

语法:

 <&#63;php $data[0] = "apple"; $data[1] = "oranges"; generateCsv($data, $delimiter = ',', $enclosure = '"'); &#63;> 

25. 解析 XML 数据

 $xml_string="<&#63;xml version='1.0'&#63;>   ben A   h2o K  "; //load the xml string using simplexml function $xml = simplexml_load_string($xml_string); //loop through the each node of molecule foreach ($xml->molecule as $record) { //attribute are accessted by echo $record['name'], ' '; //node are accessted by -> operator echo $record->symbol, ' '; echo $record->code, ''; } 

26. 解析 JSON 数据

 $json_string='{"id":1,"name":"rolf","country":"russia","office":["google","oracle"]} '; $obj=json_decode($json_string); //print the parsed data echo $obj->name; //displays rolf echo $obj->office[0]; //displays google 

27. 获取当前页面 URL
这个 PHP 片段可以帮助你让用户登录后直接跳转到之前浏览的页面

 function current_url() { $url = "http://" . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']; $validURL = str_replace("&", "&", $url); return validURL; } 

语法:

 <&#63;php echo "Currently you are on: ".current_url(); &#63;> 

28. 从任意的 Twitter 账号获取最新的 Tweet

 function my_twitter($username) { $no_of_tweets = 1; $feed = "http://search.twitter.com/search.atom&#63;q=from:" . $username . "&rpp=" . $no_of_tweets; $xml = simplexml_load_file($feed); foreach($xml->children() as $child) { foreach ($child as $value) { if($value->getName() == "link") $link = $value['href']; if($value->getName() == "content") { $cOntent= $value . ""; echo '

'.$content.'

'; } } } }

语法:

 <&#63;php $handle = "koonktech"; my_twitter($handle); &#63;> 

29. 转发数量
使用这个 PHP 片段可以检测你的页面 URL 有多少转发数量

 function tweetCount($url) { $cOntent= file_get_contents("http://api.tweetmeme.com/url_info&#63;url=".$url); $element = new SimpleXmlElement($content); $retweets = $element->story->url_count; if($retweets){ return $retweets; } else { return 0; } } 

语法:

 <&#63;php $url = "http://blog.koonk.com"; $count = tweetCount($url); return $count; &#63;> 

30. 计算两个日期的差

 <&#63;php $date1 = date( 'Y-m-d' ); $date2 = "2015-12-04"; $diff = abs(strtotime($date2) - strtotime($date1)); $years = floor($diff / (365*60*60*24)); $mOnths= floor(($diff - $years * 365*60*60*24) / (30*60*60*24)); $days = floor(($diff - $years * 365*60*60*24 - $months*30*60*60*24)/ (60*60*24)); printf("%d years, %d months, %d days\n", $years, $months, $days); -------------------------------------------------------- OR $date1 = new DateTime("2007-03-24"); $date2 = new DateTime("2009-06-26"); $interval = $date1->diff($date2); echo "difference " . $interval->y . " years, " . $interval->m." months, ".$interval->d." days "; // shows the total amount of days (not divided into years, months and days like above) echo "difference " . $interval->days . " days "; -------------------------------------------------------- OR /** * Calculate differences between two dates with precise semantics. Based on PHPs DateTime::diff() * implementation by Derick Rethans. Ported to PHP by Emil H, 2011-05-02. No rights reserved. * * See here for original code: * http://svn.php.net/viewvc/php/php-src/trunk/ext/date/lib/tm2unixtime.c&#63;revision=302890&view=markup * http://svn.php.net/viewvc/php/php-src/trunk/ext/date/lib/interval.c&#63;revision=298973&view=markup */ function _date_range_limit($start, $end, $adj, $a, $b, $result) { if ($result[$a] <$start) { $result[$b] -= intval(($start - $result[$a] - 1) / $adj) + 1; $result[$a] += $adj * intval(($start - $result[$a] - 1) / $adj + 1); } if ($result[$a] >= $end) { $result[$b] += intval($result[$a] / $adj); $result[$a] -= $adj * intval($result[$a] / $adj); } return $result; } function _date_range_limit_days($base, $result) { $days_in_month_leap = array(31, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31); $days_in_mOnth= array(31, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31); _date_range_limit(1, 13, 12, "m", "y", &$base); $year = $base["y"]; $mOnth= $base["m"]; if (!$result["invert"]) { while ($result["d"] <0) { $month--; if ($month <1) { $month += 12; $year--; } $leapyear = $year % 400 == 0 || ($year % 100 != 0 && $year % 4 == 0); $days = $leapyear &#63; $days_in_month_leap[$month] : $days_in_month[$month]; $result["d"] += $days; $result["m"]--; } } else { while ($result["d"] <0) { $leapyear = $year % 400 == 0 || ($year % 100 != 0 && $year % 4 == 0); $days = $leapyear &#63; $days_in_month_leap[$month] : $days_in_month[$month]; $result["d"] += $days; $result["m"]--; $month++; if ($month > 12) { $month -= 12; $year++; } } } return $result; } function _date_normalize($base, $result) { $result = _date_range_limit(0, 60, 60, "s", "i", $result); $result = _date_range_limit(0, 60, 60, "i", "h", $result); $result = _date_range_limit(0, 24, 24, "h", "d", $result); $result = _date_range_limit(0, 12, 12, "m", "y", $result); $result = _date_range_limit_days(&$base, &$result); $result = _date_range_limit(0, 12, 12, "m", "y", $result); return $result; } /** * Accepts two unix timestamps. */ function _date_diff($one, $two) { $invert = false; if ($one > $two) { list($one, $two) = array($two, $one); $invert = true; } $key = array("y", "m", "d", "h", "i", "s"); $a = array_combine($key, array_map("intval", explode(" ", date("Y m d H i s", $one)))); $b = array_combine($key, array_map("intval", explode(" ", date("Y m d H i s", $two)))); $result = array(); $result["y"] = $b["y"] - $a["y"]; $result["m"] = $b["m"] - $a["m"]; $result["d"] = $b["d"] - $a["d"]; $result["h"] = $b["h"] - $a["h"]; $result["i"] = $b["i"] - $a["i"]; $result["s"] = $b["s"] - $a["s"]; $result["invert"] = $invert &#63; 1 : 0; $result["days"] = intval(abs(($one - $two)/86400)); if ($invert) { _date_normalize(&$a, &$result); } else { _date_normalize(&$b, &$result); } return $result; } $date = "2014-12-04 19:37:22"; echo '
'; print_r( _date_diff( strtotime($date), time() ) ); echo '
'; &#63;>

31. 删除文件夹内容

 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; } 

语法:

 <&#63;php $path = "images/"; Delete($path); // This will delete images folder along with its contents. &#63;> 

32. 搜索和高亮字符串中的关键字

 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; } 

语法:

 <&#63;php $string = "I like chocolates and I like apples"; $words = "apple"; echo highlighter_text($string ,$words); &#63;> 

33. 写入文件

 <&#63; $filename = 'blog.csv'; $fp = fopen($filename, 'w'); $output = " Hello "; $output .= " World! "; $output .= "\r\n"; fputs($fp, $output); fclose($fp); &#63;> 

34. 根据 URL 下载图片

 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); } 

语法:

 <&#63;php $url = "http://koonk.com/images/logo.png"; $rename = "koonk.png"; imagefromURL($url,$rename); &#63;> 

35. 检测 URL 是否有效

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

语法:

 <&#63;php $url = "http://koonk.com"; $check = checkvalidURL($url); echo $check; //if returns 1 then URL is valid. &#63;> 

36. 生成二维码

 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; } 

语法:

 <&#63;php header("Content-type: image/png"); echo qr_code("http://koonk.com", "URL"); &#63;> 

37. 计算两个地图坐标之间的距离

 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'); } 

语法:

 <&#63;php $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).''; } &#63;> 

38. 获取一个特定话题标签的所有 Tweets

 function getTweets($hash_tag) { $url = 'http://search.twitter.com/search.atom&#63;q='.urlencode($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. 添加 th,st,nd 或者 rd 作为数字的后缀

 Friday the 13th function ordinal($cdnl){ $test_c = abs($cdnl) % 10; $ext = ((abs($cdnl) %100 <21 && abs($cdnl) %100 > 4) &#63; 'th' : (($test_c <4) &#63; ($test_c <3) &#63; ($test_c <2) &#63; ($test_c <1) &#63; 'th' : 'st' : 'nd' : 'rd' : 'th')); return $cdnl.$ext; } 

语法:

 <&#63;php $number = 10; echo ordinal($number); //output is 10th &#63;> 

40. 限制文件下载的速度

 <&#63;php // local file that should be 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!'); } &#63;> 

41. 把文本转换成图片

 <&#63;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); &#63;> 

42. 获取远程文件的大小

 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].+&#63;)\s/'; $count = preg_match($regex, $head, $matches); return isset($matches[1]) &#63; $matches[1] : "unknown"; } 

语法

 <&#63;php $file = "http://koonk.com/images/logo.png"; $size = remote_filesize($url); echo $size; &#63;> 

43. 使用 imagebrick 进行 pdf 到图像的转换

 <&#63;php $pdf_file = './pdf/demo.pdf'; $save_to = './jpg/demo.jpg'; //make sure that apache has permissions to write in this folder! (common problem) //execute ImageMagick command 'convert' and convert PDF to JPG with applied settings exec('convert "'.$pdf_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; &#63;> 

44. 使用 tinyurl 生成短网址

 function get_tiny_url($url) { $ch = curl_init(); $timeout = 5; curl_setopt($ch,CURLOPT_URL,'http://tinyurl.com/api-create.php&#63;url='.$url); curl_setopt($ch,CURLOPT_RETURNTRANSFER,1); curl_setopt($ch,CURLOPT_CONNECTTIMEOUT,$timeout); $data = curl_exec($ch); curl_close($ch); return $data; } 

语法:

 <&#63;php $url = "http://blog.koonk.com/2015/07/Hello-World"; $tinyurl = get_tiny_url($url); echo $tinyurl; &#63;> 

45. youtube 下载链接生成器
使用下面的 PHP 片段可以让你的用户下载 Youtube 视频

 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=", "&"); $flv_link = "http://www.youtube.com/get_video&#63;video_id=$v_id&t=$t_id"; $hq_flv_link = "http://www.youtube.com/get_video&#63;video_id=$v_id&t=$t_id&fmt=6"; $mp4_link = "http://www.youtube.com/get_video&#63;video_id=$v_id&t=$t_id&fmt=18"; $threegp_link = "http://www.youtube.com/get_video&#63;video_id=$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 样式的时间戳

 Facebook (x mins age, y hours ago etc) 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  

语法:

 <&#63;php $date = "2015-07-05 03:45"; $result = nicetime($date); // 2 days ago &#63;> 

以上就是本文的全部内容,希望对大家的学习有所帮助。

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