11. 转换 URL：从字符串变成超链接 
如果你正在开发论坛，博客或者是一个常规的表单提交，很多时候都要用户访问一个网站。使用这个函数，URL 字符串就可以自动的转换为超链接。 

',$text); 
 $text = eregi_replace('([[:space:]()[{}])(www.[-a-zA-Z0-9@:%_+.~#?&//=]+)','\1',$text); 
 $text = eregi_replace('([_.0-9a-z-]+@([0-9a-z][0-9a-z-]+.)+[a-z]{2,3})','',$text); 
return $text;

}
语法：

<?php

$text = "This is my first post on http://blog.koonk.com";

$text = makeClickableLinks($text);

echo $text;

?>


12. 阻止多个 IP 访问你的网站 
这个代码片段可以方便你禁止某些特定的 IP 地址访问你的网站 

// search current IP in $deny_ips array

if ( (array_search($ip,$deny_ips))!== FALSE ) {

// address is blocked:

echo 'Your IP adress ('.$ip.') was blocked!';

exit;

}


13. 强制性文件下载 
如果你需要下载特定的文件而不用另开新窗口，下面的代码片段可以帮助你。 


语法： 



14. 创建 JSON 数据 
使用下面的 PHP 片段可以创建 JSON 数据，可以方便你创建移动应用的 Web 服务 

1,'name'=>"Mohit");
echo json_encode($json_data);

15. 压缩 zip 文件 
使用下面的 PHP 片段可以即时压缩 zip 文件 

open($destination,$overwrite ? ZIPARCHIVE::OVERWRITE : ZIPARCHIVE::CREATE) !== true) { 
  return false; 
 } 
 //add the files 
 foreach($valid_files as $file) { 
  $zip->addFile($file,$file); 
 } 
 //debug 
 //echo 'The zip archive contains ',$zip->numFiles,' files with a status of ',$zip->status; 
//close the zip -- done!

$zip->close(); 
//check to make sure the file exists

return file_exists($destination);

}

else

{

return false;

}

}
语法：

<?php

$files=array('file1.jpg','file2.jpg','file3.gif');

create_zip($files,'myzipfile.zip',true);

?>


16. 解压文件 


语法： 



17. 缩放图片 

if($ext == "jpg" || $ext == "jpeg")

$im = imagecreatefromjpeg($tmpname);

elseif($ext == "png")

$im = imagecreatefrompng($tmpname);

elseif($ext == "gif")

$im = imagecreatefromgif($tmpname); 

$x = imagesx($im);

$y = imagesy($im); 
if($x <= $xmax && $y <= $ymax)

return $im; 
if($x >= $y) {

$newx = $xmax;

$newy = $newx  $y / $x;

}

else {

$newy = $ymax;

$newx = $x / $y  $newy;

} 
$im2 = imagecreatetruecolor($newx,$newy);

imagecopyresized($im2,$im,floor($newx),floor($newy),$y);

return $im2;

}


18. 使用 mail() 发送邮件 
之前我们提供了如何使用 Mandrill 发送邮件的 PHP 代码片段，但是如果你不想使用第三方服务，那么可以使用下面的 PHP 代码片段。 

语法：

<?php

$to = "admin@koonk.com";

$subject = "This is a test mail";

$body = "Hello World!";

send_mail($to,$body);

?>

19. 把秒转换成天数，小时数和分钟 

=86400){$days=floor($secs/86400);$secs=$secs%86400;$r=$days.' day';if($days<>1){$r.='s';}if($secs>0){$r.=',';}}
 if($secs>=3600){$hours=floor($secs/3600);$secs=$secs%3600;$r.=$hours.' hour';if($hours<>1){$r.='s';}if($secs>0){$r.=',';}}
 if($secs>=60){$minutes=floor($secs/60);$secs=$secs%60;$r.=$minutes.' minute';if($minutes<>1){$r.='s';}if($secs>0){$r.=',';}}
 $r.=$secs.' second';if($secs<>1){$r.='s';}
 return $r;
}


20. 数据库连接 
连接 MySQL 数据库 


21. 目录清单 
使用下面的 PHP 代码片段可以在一个目录中列出所有文件和文件夹 

'."\n";
  }
  }
  closedir($handle);
 }
 }
}

语法： 



22. 检测用户语言 
使用下面的 PHP 代码片段可以检测用户浏览器所使用的语言 


23. 查看 CSV 文件 

语法：

<?php

$csvFile = "test.csv";

$csv = readCSV($csvFile);

$a = csv[0][0]; // This will get value of Column 1 & Row 1

?>


24. 从 PHP 数据创建 CSV 文件 

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：

<?php

$data[0] = "apple";

$data[1] = "oranges";

generateCsv($data,$enclosure = '"');

?>


25. 解析 XML 数据 

//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 

name; //displays rolf
echo $obj->office[0]; //displays google

<font size="4">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 


语法： 



28. 从任意的 Twitter 账号获取最新的 Tweet 

getName() == "content") {
  $content = $value . "";
 echo '
';
  } 
 }
 } 
}
语法：

<?php

$handle = "koonktech";

my_twitter($handle);

?>


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 

story->url_count;
 if($retweets){
 return $retweets;
 } else {
 return 0;
 }
}
语法：

<?php

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

$count = tweetCount($url);

return $count;

?>


30. 计算两个日期的差 

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?revision=302890&view=markup
http://svn.php.net/viewvc/php/php-src/trunk/ext/date/lib/interval.c?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(31,31,29,30,31);

$days_in_month = array(31,28,31);

_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 ? $days_in_month_leap[$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 ? $days_in_month_leap[$month] : $days_in_month[$month];

$result["d"] += $days;

$result["m"]--;

$month++;

if ($month > 12) {

$month -= 12;

$year++;

}

}

}

return $result;

}

function _date_normalize($base,$result)

{

$result = _date_range_limit(0,60,"s","i",$result);

$result = _date_range_limit(0,"h",24,"d",$result);

$result = _date_range_limit_days(&$base,&$result);

$result = _date_range_limit(0,$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","s");

$a = array_combine($key,array_map("intval",explode(" ",date("Y m d H i s",$one))));

$b = array_combine($key,$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 ? 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 '
';

?>
31. 删除文件夹内容 




语法： 



32. 搜索和高亮字符串中的关键字 

$1",$text );
 }
 return $text;
}
语法： 



33. 写入文件 



34. 根据 URL 下载图片 


语法： 



35. 检测 URL 是否有效 

语法：

<?php

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

$check = checkvalidURL($url);

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

?>


36. 生成二维码 

 "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($ch,false);
 curl_setopt($ch,CURLOPT_TIMEOUT,30);
 $response = curl_exec($ch);
 curl_close($ch);
 return $response;
}

语法： 



37. 计算两个地图坐标之间的距离 


语法： 

 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. 获取一个特定话题标签的所有 Tweets 

Connecting to 
$url
 ...
";
 $ch = curl_init($url);
 curl_setopt ($ch,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 

 4) ? 'th'
  : (($test_c < 4) ? ($test_c < 3) ? ($test_c < 2) ? ($test_c < 1) 
  ? 'th' : 'st' : 'nd' : 'rd' : 'th')); 
 return $cdnl.$ext; 
}
语法： 



40. 限制文件下载的速度 

// 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. 把文本转换成图片 



42. 获取远程文件的大小 


语法： 



43. 使用 imagebrick 进行 pdf 到图像的转换 



44. 使用 tinyurl 生成短网址 

 save as):\n\t\t";
 echo "\n\t\t";
 echo "\n\t\t";
 echo "\n\t\t";
 echo "\n";
}


46. Facebook 样式的时间戳 

$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}";

}

语法： 


文章转自：
 原文链接：https://www.f2er.com/php/20353.html