46 个非常有用的 PHP 代码片段

2024-03-21 22:37:04 142

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～

1.发送SMS

在开发Web或者移动应用的时候，经常会遇到需要发送SMS给用户，或者因为登录原因，或者是为了发送信息。下面的PHP代码就实现了发送SMS的功能。
为了使用任何的语言发送SMS，需要一个SMSgateway。大部分的SMS会提供一个API，这里是使用MSG91作为SMSgateway。

functionsend_sms($mobile,$msg)
{
$authKey="XXXXXXXXXXX";
date_default_timezone_set("Asia/Kolkata");
$date=strftime("%Y-%m-%d%H:%M:%S");
//Multiplemobilesnumbersseparatedbycomma
$mobileNumber=$mobile;

//SenderID,Whileusingroute4senderidshouldbe6characterslong.
$senderId="IKOONK";

//Yourmessagetosend,AddURLencodinghere.
$message=urlencode($msg);

//Defineroute
$route="template";
//Prepareyoupostparameters
$postData=array(
'authkey'=&gt;$authKey,
'mobiles'=&gt;$mobileNumber,
'message'=&gt;$message,
'sender'=&gt;$senderId,
'route'=&gt;$route
);

//APIURL
$url="https://control.msg91.com/sendhttp.php";

//inittheresource
$ch=curl_init();
curl_setopt_array($ch,array(
CURLOPT_URL=&gt;$url,
CURLOPT_RETURNTRANSFER=&gt;true,
CURLOPT_POST=&gt;true,
CURLOPT_POSTFIELDS=&gt;$postData
//,CURLOPT_FOLLOWLOCATION=&gt;true
));


//IgnoreSSLcertificateverification
curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,0);
curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,0);


//getresponse
$output=curl_exec($ch);
//Printerrorifany
if(curl_errno($ch))
{
echo'error:'.curl_error($ch);
}

curl_close($ch);
}

其中“$authKey="XXXXXXXXXXX";”需要你输入你的密码，“$senderId="IKOONK";”需要你输入你的SenderID。当输入移动号码的时候需要指定国家代码(比如，美国是1，印度是91)。
语法：

&lt;?php
$message="HelloWorld";
$mobile="918112998787";
send_sms($mobile,$message);
?&gt;

2.使用mandrill发送邮件
Mandrill是一款强大的SMTP提供器。开发者倾向于使用一个第三方SMTPprovider来获取更好的收件交付。
下面的函数中，你需要把“Mandrill.php”放在同一个文件夹，作为PHP文件，这样就可以使用TA来发送邮件。

functionsend_email($to_email,$subject,$message1)
{
require_once'Mandrill.php';
$apikey='XXXXXXXXXX';//specifyyourapikeyhere
$mandrill=newMandrill($apikey);

$message=newstdClass();
$message-&gt;html=$message1;
$message-&gt;text=$message1;
$message-&gt;subject=$subject;
$message-&gt;from_email="blog@koonk.com";//SenderEmail
$message-&gt;from_name="KOONK";//SenderName
$message-&gt;to=array(array("email"=&gt;$to_email));
$message-&gt;track_opens=true;

$response=$mandrill-&gt;messages-&gt;send($message);
}

$apikey='XXXXXXXXXX';//specifyyourapikeyhere”这里需要你指定你的API密钥（从Mandrill账户中获得）。
语法：

&lt;?php
$to="abc@example.com";
$subject="Thisisatestemail";
$message="HelloWorld!";
send_email($to,$subject,$message);
?&gt;

为了达到最好的效果，最好按照Mandrill的教程去配置DNS。

3.PHP函数：阻止SQL注入
SQL注入或者SQLi常见的攻击网站的手段，使用下面的代码可以帮助你防止这些工具。

functionclean($input)
{
if(is_array($input))
{
foreach($inputas$key=&gt;$val)
{
$output[$key]=clean($val);
//$output[$key]=$this-&gt;clean($val);
}
}
else
{
$output=(string)$input;
//ifmagicquotesisonthenusestripslashes
if(get_magic_quotes_gpc())
{
$output=stripslashes($output);
}
//$output=strip_tags($output);
$output=htmlentities($output,ENT_QUOTES,'UTF-8');
}
//returnthecleantext
return$output;
}

语法：

&lt;?php
$text="&lt;script&gt;alert(1)&lt;/script&gt;";
$text=clean($text);
echo$text;
?&gt;

4.检测用户位置
使用下面的函数，可以检测用户是在哪个城市访问你的网站

functiondetect_city($ip){

$default='UNKNOWN';

$curlopt_useragent='Mozilla/5.0(Windows;U;WindowsNT5.1;en-US;rv:1.9.2)Gecko/20100115Firefox/3.6(.NETCLR3.5.30729)';

$url='http://ipinfodb.com/ip_locator.php?ip='.urlencode($ip);
$ch=curl_init();

$curl_opt=array(
CURLOPT_FOLLOWLOCATION=&gt;1,
CURLOPT_HEADER=&gt;0,
CURLOPT_RETURNTRANSFER=&gt;1,
CURLOPT_USERAGENT=&gt;$curlopt_useragent,
CURLOPT_URL=&gt;$url,
CURLOPT_TIMEOUT=&gt;1,
CURLOPT_REFERER=&gt;'http://'.$_SERVER['HTTP_HOST'],
);

curl_setopt_array($ch,$curl_opt);

$content=curl_exec($ch);

if(!is_null($curl_info)){
$curl_info=curl_getinfo($ch);
}

curl_close($ch);

if(preg_match('{&lt;li&gt;City:([^&lt;]*)&lt;/li&gt;}i',$content,$regs)){
$city=$regs[1];
}
if(preg_match('{&lt;li&gt;State/Province:([^&lt;]*)&lt;/li&gt;}i',$content,$regs)){
$state=$regs[1];
}

if($city!=''&&$state!=''){
$location=$city.','.$state;
return$location;
}else{
return$default;
}

}

语法：

&lt;?php
$ip=$_SERVER['REMOTE_ADDR'];
$city=detect_city($ip);
echo$city;
?&gt;

5.获取Web页面的源代码
使用下面的函数，可以获取任意Web页面的HTML代码

functiondisplay_sourcecode($url)
{
$lines=file($url);
$output="";
foreach($linesas$line_num=&gt;$line){
//loopthrueachlineandprependlinenumbers
$output.="Line#&lt;b&gt;{$line_num}&lt;/b&gt;:".htmlspecialchars($line)."\n";
}
}

语法：

&lt;?php
$url="http://blog.koonk.com";
$source=display_sourcecode($url);
echo$source;
?&gt;

6.计算喜欢你的Facebook页面的用户

functionfb_fan_count($facebook_name)
{
$data=json_decode(file_get_contents("https://graph.facebook.com/".$facebook_name));
$likes=$data-&gt;likes;
return$likes;
}

语法：

&lt;?php
$page="koonktechnologies";
$count=fb_fan_count($page);
echo$count;
?&gt;

7.确定任意图片的主导颜色

functiondominant_color($image)
{
$i=imagecreatefromjpeg($image);
for($x=0;$x&lt;imagesx($i);$x++){
for($y=0;$y&lt;imagesy($i);$y++){
$rgb=imagecolorat($i,$x,$y);
$r=($rgb&gt;&gt;16)&0xFF;
$g=($rgb&gt;&gt;&0xFF;
$b=$rgb&0xFF;
$rTotal+=$r;
$gTotal+=$g;
$bTotal+=$b;
$total++;
}
}
$rAverage=round($rTotal/$total);
$gAverage=round($gTotal/$total);
$bAverage=round($bTotal/$total);
}

8.whois查询
使用下面的函数可以获取任何域名用户的完整细节

functionwhois_query($domain){

//fixthedomainname:
$domain=strtolower(trim($domain));
$domain=preg_replace('/^http:\/\//i','',$domain);
$domain=preg_replace('/^www\./i','',$domain);
$domain=explode('/',$domain);
$domain=trim($domain[0]);

//splittheTLDfromdomainname
$_domain=explode('.',$domain);
$lst=count($_domain)-1;
$ext=$_domain[$lst];

//Youfindresourcesandlists
//liketheseonwikipedia:
//
//http://de.wikipedia.org/wiki/Whois
//
$servers=array(
"biz"=&gt;"whois.neulevel.biz",
"com"=&gt;"whois.internic.net",
"us"=&gt;"whois.nic.us",
"coop"=&gt;"whois.nic.coop",
"info"=&gt;"whois.nic.info",
"name"=&gt;"whois.nic.name",
"net"=&gt;"whois.internic.net",
"gov"=&gt;"whois.nic.gov",
"edu"=&gt;"whois.internic.net",
"mil"=&gt;"rs.internic.net",
"int"=&gt;"whois.iana.org",
"ac"=&gt;"whois.nic.ac",
"ae"=&gt;"whois.uaenic.ae",
"at"=&gt;"whois.ripe.net",
"au"=&gt;"whois.aunic.net",
"be"=&gt;"whois.dns.be",
"bg"=&gt;"whois.ripe.net",
"br"=&gt;"whois.registro.br",
"bz"=&gt;"whois.belizenic.bz",
"ca"=&gt;"whois.cira.ca",
"cc"=&gt;"whois.nic.cc",
"ch"=&gt;"whois.nic.ch",
"cl"=&gt;"whois.nic.cl",
"cn"=&gt;"whois.cnnic.net.cn",
"cz"=&gt;"whois.nic.cz",
"de"=&gt;"whois.nic.de",
"fr"=&gt;"whois.nic.fr",
"hu"=&gt;"whois.nic.hu",
"ie"=&gt;"whois.domainregistry.ie",
"il"=&gt;"whois.isoc.org.il",
"in"=&gt;"whois.ncst.ernet.in",
"ir"=&gt;"whois.nic.ir",
"mc"=&gt;"whois.ripe.net",
"to"=&gt;"whois.tonic.to",
"tv"=&gt;"whois.tv",
"ru"=&gt;"whois.ripn.net",
"org"=&gt;"whois.pir.org",
"aero"=&gt;"whois.information.aero",
"nl"=&gt;"whois.domain-registry.nl"
);

if(!isset($servers[$ext])){
die('Error:Nomatchingnicserverfound!');
}

$nic_server=$servers[$ext];

$output='';

//connecttowhoisserver:
if($conn=fsockopen($nic_server,43)){
fputs($conn,$domain."\r\n");
while(!feof($conn)){
$output.=fgets($conn,128);
}
fclose($conn);
}
else{die('Error:Couldnotconnectto'.$nic_server.'!');}

return$output;
}

语法：

&lt;?php
$domain="http://www.blog.koonk.com";
$result=whois_query($domain);
print_r($result);
?&gt;

9.验证邮箱地址
有时候，当在网站填写表单，用户可能会输入错误的邮箱地址，这个函数可以验证邮箱地址是否有效。

functionis_validemail($email)
{
$check=0;
if(filter_var($email,FILTER_VALIDATE_EMAIL))
{
$check=1;
}
return$check;
}

语法：
&lt;?php
$email="blog@koonk.com";
$check=is_validemail($email);
echo$check;
//Iftheoutputis1,thenemailisvalid.
?&gt;

10.获取用户的真实 IP

functiongetRealIpAddr()
{
if(!emptyempty($_SERVER['HTTP_CLIENT_IP']))
{
$ip=$_SERVER['HTTP_CLIENT_IP'];
}
elseif(!emptyempty($_SERVER['HTTP_X_FORWARDED_FOR']))
//tocheckipispassfromproxy
{
$ip=$_SERVER['HTTP_X_FORWARDED_FOR'];
}
else
{
$ip=$_SERVER['REMOTE_ADDR'];
}
return$ip;
}

语法：

&lt;?php
$ip=getRealIpAddr();
echo$ip;
?&gt;

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。

functionmakeClickableLinks($text)
{
$text=eregi_replace('(((f|ht){1}tp://)[-a-zA-Z0-9@:%_+.~#?&//=]+)',
'&lt;ahref="\1"&gt;\1&lt;/a&gt;',$text);
$text=eregi_replace('([[:space:]()[{}])(www.[-a-zA-Z0-9@:%_+.~#?&//=]+)',
'\1&lt;ahref="http://\2"&gt;\2&lt;/a&gt;',$text);
$text=eregi_replace('([_.0-9a-z-]+@([0-9a-z][0-9a-z-]+.)+[a-z]{2,3})',
'&lt;ahref="mailto:\1"&gt;\1&lt;/a&gt;',$text);

return$text;
}

语法：
&lt;?php
$text="Thisismyfirstpostonhttp://blog.koonk.com";
$text=makeClickableLinks($text);
echo$text;
?&gt;

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

if(!file_exists('blocked_ips.txt')){
$deny_ips=array(
'127.0.0.1',
'192.168.1.1',
'83.76.27.9',
'192.168.1.163'
);
}else{
$deny_ips=file('blocked_ips.txt');
}
//readuseripadress:
$ip=isset($_SERVER['REMOTE_ADDR'])?trim($_SERVER['REMOTE_ADDR']):'';

//searchcurrentIPin$deny_ipsarray
if((array_search($ip,$deny_ips))!==FALSE){
//addressisblocked:
echo'YourIPadress('.$ip.')wasblocked!';
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。

functionforce_download($file)
{
$dir="../log/exports/";
if((isset($file))&&(file_exists($dir.$file))){
header("Content-type:application/force-download");
header('Content-Disposition:inline;filename="'.$dir.$file.'"');
header("Content-Transfer-Encoding:Binary");
header("Content-length:".filesize($dir.$file));
header('Content-Type:application/octet-stream');
header('Content-Disposition:attachment;filename="'.$file.'"');
readfile("$dir$file");
}else{
echo"Nofileselected";
}
}

语法：

&lt;php
force_download("image.jpg");
?&gt;

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

$json_data=array('id'=&gt;1,'name'=&gt;"Mohit");
echojson_encode($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

functioncreate_zip($files=array(),$destination='',$overwrite=false){
//ifthezipfilealreadyexistsandoverwriteisfalse,returnfalse
if(file_exists($destination)&&!$overwrite){returnfalse;}
//vars
$valid_files=array();
//iffileswerepassedin...
if(is_array($files)){
//cyclethrougheachfile
foreach($filesas$file){
//makesurethefileexists
if(file_exists($file)){
$valid_files[]=$file;
}
}
}
//ifwehavegoodfiles...
if(count($valid_files)){
//createthearchive
$zip=newZipArchive();
if($zip-&gt;open($destination,$overwrite?ZIPARCHIVE::OVERWRITE:ZIPARCHIVE::CREATE)!==true){
returnfalse;
}
//addthefiles
foreach($valid_filesas$file){
$zip-&gt;addFile($file,$file);
}
//debug
//echo'Theziparchivecontains',$zip-&gt;numFiles,'fileswithastatusof',$zip-&gt;status;

//closethezip--done!
$zip-&gt;close();

//checktomakesurethefileexists
returnfile_exists($destination);
}
else
{
returnfalse;
}
}

语法：
&lt;?php
$files=array('file1.jpg','file2.jpg','file3.gif');
create_zip($files,'myzipfile.zip',true);
?&gt;

16.解压文件

functionunzip($location,$newLocation)
{
if(exec("unzip$location",$arr)){
mkdir($newLocation);
for($i=1;$i&lt;count($arr);$i++){
$file=trim(preg_replace("~inflating:~","",$arr[$i]));
copy($location.'/'.$file,$newLocation.'/'.$file);
unlink($location.'/'.$file);
}
returnTRUE;
}else{
returnFALSE;
}
}

语法：

&lt;?php
unzip('test.zip','unziped/test');//Filewouldbeunzippedinunziped/testfolder
?&gt;

17.缩放图片

functionresize_image($filename,$tmpname,$xmax,$ymax)
{
$ext=explode(".",$filename);
$ext=$ext[count($ext)-1];

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($x&lt;=$xmax&&$y&lt;=$ymax)
return$im;

if($x&gt;=$y){
$newx=$xmax;
$newy=$newx*$y/$x;
}
else{
$newy=$ymax;
$newx=$x/$y*$newy;
}

$im2=imagecreatetruecolor($newx,$newy);
imagecopyresized($im2,$im,0,0,0,0,floor($newx),floor($newy),$x,$y);
return$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。

functionsend_mail($to,$subject,$body)
{
$headers="From:KOONK\r\n";
$headers.="Reply-To:blog@koonk.com\r\n";
$headers.="Return-Path:blog@koonk.com\r\n";
$headers.="X-Mailer:PHP5\n";
$headers.='MIME-Version:1.0'."\n";
$headers.='Content-type:text/html;charset=iso-8859-1'."\r\n";
mail($to,$subject,$body,$headers);
}

语法：
&lt;?php
$to="admin@koonk.com";
$subject="Thisisatestmail";
$body="HelloWorld!";
send_mail($to,$subject,$body);
?&gt;

19.把秒转换成天数，小时数和分钟

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

语法：

&lt;?php
$seconds="56789";
$output=secsToStr($seconds);
echo$output;
?&gt;

20.数据库连接
连接MySQL数据库

&lt;?php
$DBNAME='koonk';
$HOST='localhost';
$DBUSER='root';
$DBPASS='koonk';
$CONNECT=mysql_connect($HOST,$DBUSER,$DBPASS);
if(!$CONNECT)
{
echo'MySQLError:'.mysql_error();
}
$SELECT=mysql_select_db($DBNAME);
if(!$SELECT)
{
echo'MySQLError:'.mysql_error();
}
?&gt;

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

functionlist_files($dir)
{
if(is_dir($dir))
{
if($handle=opendir($dir))
{
while(($file=readdir($handle))!==false)
{
if($file!="."&&$file!=".."&&$file!="Thumbs.db"/*peskywindows,images..*/)
{
echo'&lt;atarget="_blank"href="'.$dir.$file.'"&gt;'.$file.'&lt;/a&gt;'."\n";
}
}
closedir($handle);
}
}
}

语法：

&lt;?php
list_files("images/");//Thiswilllistallfilesofimagesfolder
?&gt;

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

functionget_client_language($availableLanguages,$default='en'){
if(isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])){
$langs=explode(',',$_SERVER['HTTP_ACCEPT_LANGUAGE']);
foreach($langsas$value){
$choice=substr($value,0,2);
if(in_array($choice,$availableLanguages)){
return$choice;
}
}
}
return$default;
}

23.查看CSV文件

functionreadCSV($csvFile){
$file_handle=fopen($csvFile,'r');
while(!feof($file_handle)){
$line_of_text[]=fgetcsv($file_handle,1024);
}
fclose($file_handle);
return$line_of_text;
}

语法：
&lt;?php
$csvFile="test.csv";
$csv=readCSV($csvFile);
$a=csv[0][0];//ThiswillgetvalueofColumn1&Row1
?&gt;

24.从PHP数据创建CSV文件

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

语法：
&lt;?php
$data[0]="apple";
$data[1]="oranges";
generateCsv($data,$delimiter=',',$enclosure='"');
?&gt;

25.解析XML数据

$xml_string="&lt;?xmlversion='1.0'?&gt;
&lt;moleculedb&gt;
&lt;moleculename='Benzine'&gt;
&lt;symbol&gt;ben&lt;/symbol&gt;
&lt;code&gt;A&lt;/code&gt;
&lt;/molecule&gt;
&lt;moleculename='Water'&gt;
&lt;symbol&gt;h2o&lt;/symbol&gt;
&lt;code&gt;K&lt;/code&gt;
&lt;/molecule&gt;
&lt;/moleculedb&gt;";

//loadthexmlstringusingsimplexmlfunction
$xml=simplexml_load_string($xml_string);

//loopthroughtheeachnodeofmolecule
foreach($xml-&gt;moleculeas$record)
{
//attributeareaccesstedby
echo$record['name'],'';
//nodeareaccesstedby-&gt;operator
echo$record-&gt;symbol,'';
echo$record-&gt;code,'';
}

26.解析JSON数据

$json_string='{"id":1,"name":"rolf","country":"russia","office":["google","oracle"]}';
$obj=json_decode($json_string);
//printtheparseddata
echo$obj-&gt;name;//displaysrolf
echo$obj-&gt;office[0];//displaysgoogle

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

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

语法：

&lt;?php
echo"Currentlyyouareon:".current_url();
?&gt;

28.从任意的Twitter账号获取最新的Tweet

functionmy_twitter($username)
{
$no_of_tweets=1;
$feed="http://search.twitter.com/search.atom?q=from:".$username."&rpp=".$no_of_tweets;
$xml=simplexml_load_file($feed);
foreach($xml-&gt;children()as$child){
foreach($childas$value){
if($value-&gt;getName()=="link")$link=$value['href'];
if($value-&gt;getName()=="content"){
$content=$value."";
echo'&lt;pclass="twit"&gt;'.$content.'&lt;aclass="twt"href="'.$link.'"title=""&gt;&lt;/a&gt;&lt;/p&gt;';
}
}
}
}

语法：
&lt;?php
$handle="koonktech";
my_twitter($handle);
?&gt;

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

functiontweetCount($url){
$content=file_get_contents("http://api.tweetmeme.com/url_info?url=".$url);
$element=newSimpleXmlElement($content);
$retweets=$element-&gt;story-&gt;url_count;
if($retweets){
return$retweets;
}else{
return0;
}
}

语法：
&lt;?php
$url="http://blog.koonk.com";
$count=tweetCount($url);
return$count;
?&gt;

30.计算两个日期的差

&lt;?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("%dyears,%dmonths,%ddays\n",$years,$months,$days);
--------------------------------------------------------OR
$date1=newDateTime("2007-03-24");
$date2=newDateTime("2009-06-26");
$interval=$date1-&gt;diff($date2);
echo"difference".$interval-&gt;y."years,".$interval-&gt;m."months,".$interval-&gt;d."days";
//showsthetotalamountofdays(notdividedintoyears,monthsanddayslikeabove)
echo"difference".$interval-&gt;days."days";
--------------------------------------------------------OR


/**
*Calculatedifferencesbetweentwodateswithprecisesemantics.BasedonPHPsDateTime::diff()
*implementationbyDerickRethans.PortedtoPHPbyEmilH,2011-05-02.Norightsreserved.
*
*Seeherefororiginalcode:
*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]&lt;$start){
$result[$b]-=intval(($start-$result[$a]-1)/$adj)+1;
$result[$a]+=$adj*intval(($start-$result[$a]-1)/$adj+1);
}
if($result[$a]&gt;=$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"]&lt;0){
$month--;
if($month&lt;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"]&lt;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&gt;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$result;
}
/**
*Acceptstwounixtimestamps.
*/
function_date_diff($one,$two)
{
$invert=false;
if($one&gt;$two){
list($one,$two)=array($two,$one);
$invert=true;
}
$key=array("y","m","d","h","i","s");
$a=array_combine($key,array_map("intval",explode("",date("YmdHis",$one))));
$b=array_combine($key,array_map("intval",explode("",date("YmdHis",$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;
}
$date="2014-12-0419:37:22";
echo'&lt;pre&gt;';
print_r(_date_diff(strtotime($date),time()));
echo'&lt;/pre&gt;';
?&gt;

31.删除文件夹内容

functionDelete($path)
{
if(is_dir($path)===true)
{
$files=array_diff(scandir($path),array('.','..'));
foreach($filesas$file)
{
Delete(realpath($path).'/'.$file);
}
returnrmdir($path);
}
elseif(is_file($path)===true)
{
returnunlink($path);
}
returnfalse;
}

语法：

&lt;?php
$path="images/";
Delete($path);//Thiswilldeleteimagesfolderalongwithitscontents.
?&gt;

32.搜索和高亮字符串中的关键字

functionhighlighter_text($text,$words)
{
$split_words=explode("",$words);
foreach($split_wordsas$word)
{
$color="#4285F4";
$text=preg_replace("|($word)|Ui",
"&lt;spanstyle=\"color:".$color.";\"&gt;&lt;b&gt;$1&lt;/b&gt;&lt;/span&gt;",$text);
}
return$text;
}

语法：

&lt;?php
$string="IlikechocolatesandIlikeapples";
$words="apple";
echohighlighter_text($string,$words);
?&gt;

33.写入文件

&lt;?
$filename='blog.csv';
$fp=fopen($filename,'w');
$output="Hello";
$output.="World!";
$output.="\r\n";
fputs($fp,$output);
fclose($fp);
?&gt;

34.根据URL下载图片

functionimagefromURL($image,$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：

&lt;?php
$url="http://koonk.com/images/logo.png";
$rename="koonk.png";
imagefromURL($url,$rename);
?&gt;

35.检测URL是否有效

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

语法：
&lt;?php
$url="http://koonk.com";
$check=checkvalidURL($url);
echo$check;//ifreturns1thenURLisvalid.
?&gt;

36.生成二维码

functionqr_code($data,$type="TXT",$size='150',$ec='L',$margin='0')
{
$types=array("URL"=--&gt;"http://","TEL"=&gt;"TEL:","TXT"=&gt;"","EMAIL"=&gt;"MAILTO:");
if(!in_array($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：

&lt;?php
header("Content-type:image/png");
echoqr_code("http://koonk.com","URL");
?&gt;

37.计算两个地图坐标之间的距离

functiongetDistanceBetweenPointsNew($latitude1,$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;
returncompact('miles','feet','yards','kilometers','meters');
}

语法：

&lt;?php
$point1=array('lat'=&gt;40.770623,'long'=&gt;-73.964367);
$point2=array('lat'=&gt;40.758224,'long'=&gt;-73.917404);
$distance=getDistanceBetweenPointsNew($point1['lat'],$point1['long'],$point2['lat'],$point2['long']);
foreach($distanceas$unit=&gt;$value){
echo$unit.':'.number_format($value,4).'';
}
?&gt;

38.获取一个特定话题标签的所有Tweets

functiongetTweets($hash_tag){
$url='http://search.twitter.com/search.atom?q='.urlencode($hash_tag);
echo"&lt;p&gt;Connectingto&lt;strong&gt;$url&lt;/strong&gt;...&lt;/p&gt;";
$ch=curl_init($url);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,TRUE);
$xml=curl_exec($ch);
curl_close($ch);
//IfyouwanttoseetheresponsefromTwitter,uncommentthisnextpartout:
//echo"&lt;p&gt;Response:&lt;/p&gt;";
//echo"&lt;pre&gt;".htmlspecialchars($xml)."&lt;/pre&gt;";
$affected=0;
$twelement=newSimpleXMLElement($xml);
foreach($twelement-&gt;entryas$entry){
$text=trim($entry-&gt;title);
$author=trim($entry-&gt;author-&gt;name);
$time=strtotime($entry-&gt;published);
$id=$entry-&gt;id;
echo"&lt;p&gt;Tweetfrom".$author.":&lt;strong&gt;".$text."&lt;/strong&gt;&lt;em&gt;Posted".date('n/j/yg:ia',$time)."&lt;/em&gt;&lt;/p&gt;";
}
returntrue;
}

39.添加th,st,nd或者rd作为数字的后缀

Fridaythe13th
functionordinal($cdnl){
$test_c=abs($cdnl)%10;
$ext=((abs($cdnl)%100&lt;21&&abs($cdnl)%100&gt;4)?'th'
:(($test_c&lt;4)?($test_c&lt;3)?($test_c&lt;2)?($test_c&lt;1)
?'th':'st':'nd':'rd':'th'));
return$cdnl.$ext;
}

语法：

&lt;?php
$number=10;
echoordinal($number);//outputis10th
?&gt;

40.限制文件下载的速度

&lt;?php
//localfilethatshouldbesendtotheclient
$local_file='test-file.zip';
//filenamethattheusergetsasdefault
$download_file='your-download-name.zip';

//setthedownloadratelimit(=&gt;20,5kb/s)
$download_rate=20.5;
if(file_exists($local_file)&&is_file($local_file)){
//sendheaders
header('Cache-control:private');
header('Content-Type:application/octet-stream');
header('Content-Length:'.filesize($local_file));
header('Content-Disposition:filename='.$download_file);

//flushcontent
flush();
//openfilestream
$file=fopen($local_file,"r");
while(!feof($file)){

//sendthecurrentfileparttothebrowser
printfread($file,round($download_rate*1024));

//flushthecontenttothebrowser
flush();

//sleeponesecond
sleep(1);
}

//closefilestream
fclose($file);}
else{
die('Error:Thefile'.$local_file.'doesnotexist!');
}
?&gt;

41.把文本转换成图片

&lt;?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);
?&gt;

42.获取远程文件的大小

functionremote_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);
returnisset($matches[1])?$matches[1]:"unknown";
}

语法：

&lt;?php
$file="http://koonk.com/images/logo.png";
$size=remote_filesize($url);
echo$size;
?&gt;

43.使用imagebrick进行pdf到图像的转换

&lt;?php
$pdf_file='./pdf/demo.pdf';
$save_to='./jpg/demo.jpg';//makesurethatapachehaspermissionstowriteinthisfolder!(commonproblem)
//executeImageMagickcommand'convert'andconvertPDFtoJPGwithappliedsettings
exec('convert"'.$pdf_file.'"-colorspaceRGB-resize800"'.$save_to.'"',$output,$return_var);
if($return_var==0){//ifexecsuccessfulyconvertedpdftojpg
print"ConversionOK";
}
elseprint"Conversionfailed.".$output;
?&gt;

44.使用tinyurl生成短网址

functionget_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;
}

语法：

&lt;?php
$url="http://blog.koonk.com/2015/07/Hello-World";
$tinyurl=get_tiny_url($url);
echo$tinyurl;
?&gt;

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

functionstr_between($string,$start,$end)
{
$string="".$string;$ini=strpos($string,$start);if($ini==0)return"";$ini+=strlen($start);$len=strpos($string,$end,$ini)-$ini;returnsubstr($string,$ini,$len);}
functionget_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=$t_id&fmt=17";
echo"\t\tDownload(right-click&gt;saveas):\n\t\t";
echo"&lt;ahref=\"$flv_link\"&gt;FLV&lt;/a&gt;\n\t\t";
echo"&lt;ahref=\"$hq_flv_link\"&gt;HQFLV(ifavailable)&lt;/a&gt;\n\t\t";
echo"&lt;ahref=\"$mp4_link\"&gt;MP4&lt;/a&gt;\n\t\t";
echo"&lt;ahref=\"$threegp_link\"&gt;3GP&lt;/a&gt;\n";
}

46.Facebook样式的时间戳

Facebook(xminsage,yhoursagoetc)
functionnicetime($date)
{
if(empty($date)){
return"Nodateprovided";
}

$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);

//checkvalidityofdate
if(empty($unix_date)){
return"Baddate";
}
//isitfuturedateorpastdate
if($now&gt;$unix_date){
$difference=$now-$unix_date;
$tense="ago";

}else{
$difference=$unix_date-$now;
$tense="fromnow";
}

for($j=0;$difference&gt;=$lengths[$j]&&$j&lt;count($lengths)-1;$j++){
$difference/=$lengths[$j];
}

$difference=round($difference);

if($difference!=1){
$periods[$j].="s";
}

return"$difference$periods[$j]{$tense}";
}

语法：

&lt;?php
$date="2015-07-0503:45";
$result=nicetime($date);//2daysago
?&gt;

文章转自：http://blog.koonk.com

46 个非常有用的 PHP 代码片段

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