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一、查看郵件是否已被閱讀
當(dāng)你在發(fā)送郵件時(shí),你或許很想知道該郵件是否被對(duì)方已閱讀。這里有段非常有趣的代碼片段能夠顯示對(duì)方IP地址記錄閱讀的實(shí)際日期和時(shí)間。
復(fù)制代碼 代碼如下:
<?
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);
?>
二、從網(wǎng)頁(yè)中提取關(guān)鍵字
一段偉大的代碼片段能夠輕松的從網(wǎng)頁(yè)中提取關(guān)鍵字。
復(fù)制代碼 代碼如下:
$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 );
三、查找頁(yè)面上的所有鏈接
使用DOM,你可以輕松從任何頁(yè)面上抓取鏈接,代碼示例如下:
復(fù)制代碼 代碼如下:
$html = file_get_contents('http://www.example.com');
$dom = new DOMDocument();
@$dom->loadHTML($html);
// grab all the on the page
$xpath = new DOMXPath($dom);
$hrefs = $xpath->evaluate("/html/body//a");
for ($i = 0; $i < $hrefs->length; $i++) {
$href = $hrefs->item($i);
$url = $href->getAttribute('href');
echo $url.'<br />';
}
四、自動(dòng)轉(zhuǎn)換URL,跳轉(zhuǎn)至超鏈接
在WordPress中,如果你想自動(dòng)轉(zhuǎn)換URL,跳轉(zhuǎn)至超鏈接頁(yè)面,你可以利用內(nèi)置的函數(shù)make_clickable()執(zhí)行此操作。如果你想基于WordPress之外操作該程序,那么你可以參考wp-includes/formatting.php源代碼。
復(fù)制代碼 代碼如下:
function _make_url_clickable_cb($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 $ret;
}
五、創(chuàng)建數(shù)據(jù)URL
數(shù)據(jù)URL可以直接嵌入到HTML/CSS/JS中,以節(jié)省大量的 HTTP請(qǐng)求。 下面的這段代碼可利用$file輕松創(chuàng)建數(shù)據(jù)URL。
復(fù)制代碼 代碼如下:
function data_uri($file, $mime) {
$contents=file_get_contents($file);
$base64=base64_encode($contents);
echo "data:$mime;base64,$base64";
}
六、從服務(wù)器上下載&保存一個(gè)遠(yuǎn)程圖片
當(dāng)你在搭建網(wǎng)站時(shí),從遠(yuǎn)程服務(wù)器下載某張圖片并且將其保存在自己的服務(wù)器上,這一操作會(huì)經(jīng)常用到。代碼如下:
復(fù)制代碼 代碼如下:
$image = file_get_contents('http://www.url.com/image.jpg');
file_put_contents('/images/image.jpg', $image); //Where to save the image
七、移除Remove Microsoft Word HTML Tag
當(dāng)你使用Microsoft Word會(huì)創(chuàng)建許多Tag,比如font,span,style,class等。這些標(biāo)簽對(duì)于Word本身而言是非常有用的,但是當(dāng)你從Word粘貼至網(wǎng)頁(yè)時(shí),你會(huì)發(fā)現(xiàn)很多無用的Tag。因此,下面的這段代碼可幫助你刪除所有無用的Word HTML Tag。
復(fù)制代碼 代碼如下:
function cleanHTML($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 $html
}
八、檢測(cè)瀏覽器語言
如果你的網(wǎng)站上有多種語言,那么可以使用這段代碼作為默認(rèn)的語言來檢測(cè)瀏覽器語言。該段代碼將返回瀏覽器客戶端使用的初始語言。
復(fù)制代碼 代碼如下:
function get_client_language($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;
}
九、顯示Facebook 粉絲數(shù)量
如果你的網(wǎng)站或者博客上有內(nèi)鏈的Facebook頁(yè)面,你或許想知道擁有多少粉絲。這段代碼將幫助你查看Facebook粉絲數(shù),記住,別忘了在你的頁(yè)面ID第二行添加該段代碼。
復(fù)制代碼 代碼如下:
<?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."") or die ("a lot");
$fans = $xml->page->fan_count;
echo $fans;
?>
php技術(shù):9段PHP實(shí)用功能的代碼推薦,轉(zhuǎn)載需保留來源!
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