绝对值得收藏的实用PHP代码片段 极客标签

绝对值得收藏的实用PHP代码片段 极客标签 – 做最棒的极客知识分享平台.
收藏一些实用的代码片段绝对非常有必要,在这篇文章中我们将分享10个非常实用的PHP代码片段,还想什么,赶紧收藏吧!

相关标签文章:代码片段

验证发送的电子邮件是否被阅读

<?
error_reporting(0);
Header("Content-Type: image/jpeg");

//Get IP
if(!empty($_SERVER['HTTP_CLIENT_IP']))
{
$ip=$_SERVER['HTTP_CLIENT_IP'];
}
elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR']))
{
$ip=$_SERVER['HTTP_X_FORWARDED_FOR'];
}
else
{
$ip=$_SERVER['REMOTE_ADDR'];
}

//Time
$actual_time = time();
$actual_day = date('Y.m.d', $actual_time);
$actual_day_chart = date('d/m/y', $actual_time);
$actual_hour = date('H:i:s', $actual_time);

//GET Browser
$browser = $_SERVER['HTTP_USER_AGENT'];
//LOG
$myFile ="log.txt";
$fh = fopen($myFile,'a+');
$stringData = $actual_day .' '. $actual_hour .' '. $ip .' '. $browser .' '."\r\n";
fwrite($fh, $stringData);
fclose($fh);

//Generate Image (Es. dimesion is 1x1)
$newimage =ImageCreate(1,1);
$grigio =ImageColorAllocate($newimage,255,255,255);
ImageJPEG($newimage);
ImageDestroy($newimage);
?>

获取web页面中Meta标签里的keyword


$meta = get_meta_tags('http://www.emoticode.net/');
$keywords = $meta['keywords'];
// Split keywords
$keywords = explode(',', $keywords );
// Trim them
$keywords = array_map('trim', $keywords );
// Remove empty values
$keywords = array_filter( $keywords );

print_r( $keywords );

找到页面中所有的链接

使用DOM,你可以很方便的获取页面中的全部链接

$html = file_get_contents('http://www.example.com');

$dom =newDOMDocument();
@$dom->loadHTML($html);

// grab all the on the page
$xpath =newDOMXPath($dom);
$hrefs = $xpath->evaluate("/html/body//a");

for($i =0; $i < $hrefs->length; $i++){
$href = $hrefs->item($i);
$url = $href->getAttribute('href');
echo $url.'<br />';
}

自动转化URL为可点击的链接

这个超实用,非常适合快速的转化用户输入的URL地址。

在wordpress中,如果我们需要转化URL,只需要调用make_clickable(),如果你在其它地方使用,可以参考下面代码:

function _make_url_clickable_cb($matches){
$ret ='';
$url = $matches[2];
if( empty($url))
return $matches[0];
// removed trailing [.,;:] from URL
if( in_array(substr($url,-1), array('.',',',';',':'))===true){
$ret = substr($url,-1);
$url = substr($url,0, strlen($url)-1);
}
return $matches[1]."<a href=\"$url\" rel=\"nofollow\">$url</a>". $ret;
}
function _make_web_ftp_clickable_cb($matches){
$ret ='';
$dest = $matches[2];
$dest ='http://'. $dest;
if( empty($dest))
return $matches[0];
// removed trailing [,;:] from URL
if( in_array(substr($dest,-1), array('.',',',';',':'))===true){
$ret = substr($dest,-1);
$dest = substr($dest,0, strlen($dest)-1);
}
return $matches[1]."<a href=\"$dest\" rel=\"nofollow\">$dest</a>". $ret;
}
function _make_email_clickable_cb($matches){
$email = $matches[2].'@'. $matches[3];
return $matches[1]."<a href=\"mailto:$email\">$email</a>";
}
function make_clickable($ret){
$ret =' '. $ret;
// in testing, using arrays here was found to be faster
$ret = preg_replace_callback('#([\s>])([\w]+?://[\w\\x80-\\xff\#$%&~/.\-;:=,?@\[\]+]*)#is','_make_url_clickable_cb', $ret);
$ret = preg_replace_callback('#([\s>])((www|ftp)\.[\w\\x80-\\xff\#$%&~/.\-;:=,?@\[\]+]*)#is','_make_web_ftp_clickable_cb', $ret);
$ret = preg_replace_callback('#([\s>])([.0-9a-z_+-]+)@(([0-9a-z-]+\.)+[0-9a-z]{2,})#i','_make_email_clickable_cb', $ret);
// this one is not in an array because we need it to run last, for cleanup of accidental links within links
$ret = preg_replace("#(<a( [^>]+?>|>))<a [^>]+?>([^>]+?)</a></a>#i","$1$3</a>", $ret);
$ret = trim($ret);
return $ret;
}

创建数据URI

Data URI可以用来插入图片到HTML/CSS/JS。下面代码基于$file来创建DATA URI。

function data_uri($file, $mime){
$contents=file_get_contents($file);
$base64=base64_encode($contents);
echo "data:$mime;base64,$base64";
}

下载保存远程图片到本地

这段代码可以帮助你将远程图片保存到服务器

$image = file_get_contents('http://www.gbtags.com.com/gb/networks/themes/img/logocommunity.png');
file_put_contents('/images/image.jpg', $image);//服务器保存地址

去除微软word生成的大量标签

如果你把word里的内容拷贝到web页面,会生成大量的额外标签,下面代码可以帮助你去除这些代码:

function cleanHTML($html){
/// <summary>
/// Removes all FONT and SPAN tags, and all Class and Style attributes.
/// Designed to get rid of non-standard Microsoft Word HTML tags.
/// </summary>
// start by completely removing all unwanted tags

$html = ereg_replace("<(/)?(font|span|del|ins)[^>]*>","",$html);

// then run another pass over the html (twice), removing unwanted attributes

$html = ereg_replace("<([^>]*)(class|lang|style|size|face)=("[^"]*"|'[^']*'|[^>]+)([^>]*)>","<\1>",$html);
$html = ereg_replace("<([^>]*)(class|lang|style|size|face)=("[^"]*"|'[^']*'|[^>]+)([^>]*)>","<\1>",$html);

return $html
}

检测浏览器语言

以下代码返回用户浏览器使用的语言

function get_client_language($availableLanguages, $default='en'){
if(isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])){
$langs=explode(',',$_SERVER['HTTP_ACCEPT_LANGUAGE']);

foreach($langs as $value){
$choice=substr($value,0,2);
if(in_array($choice, $availableLanguages)){
return $choice;
}
}
}
return $default;
}

显示facebook的好友(这个估计天朝用不上)

<?php
$page_id ="YOUR PAGE-ID";
$xml =@simplexml_load_file("http://api.facebook.com/restserver.php?method=facebook.fql.query&query=SELECT%20fan_count%20FROM%20page%20WHERE%20page_id=".$page_id."")ordie("a lot");
$fans = $xml->page->fan_count;
echo $fans;
?>

via catswhocode

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