《PHP實戰：9個經典的PHP代碼片段分享》要點：
本文介紹了PHP實戰：9個經典的PHP代碼片段分享，希望對您有用。如果有疑問，可以聯系我們。
PHP實例一、查看郵件是否已被閱讀
PHP實例 當你在發送郵件時,你或許很想知道該郵件是否被對方已閱讀.這里有段非常有趣的代碼片段能夠顯示對方IP地址記錄閱讀的實際日期和時間.
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);
?>
PHP實例二、從網頁中提取關鍵字
PHP實例 一段偉大的代碼片段能夠輕松的從網頁中提取關鍵字.
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 );
PHP實例三、查找頁面上的所有鏈接
PHP實例 使用DOM,你可以輕松從任何頁面上抓取鏈接,代碼示例如下：
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 $url.'<br />';
}
PHP實例四、自動轉換URL,跳轉至超鏈接
PHP實例 在WordPress中,如果你想自動轉換URL,跳轉至超鏈接頁面,你可以利用內置的函數make_clickable()執行此操作.如果你想基于WordPress之外操作該程序,那么你可以參考wp-includes/formatting.php源代碼.
代碼如下:
function _make_url_clickable_cb($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 $ret;
}
PHP實例五、創建數據URL
PHP實例 數據URL可以直接嵌入到HTML/CSS/JS中,以節省大量的 HTTP哀求. 下面的這段代碼可利用$file輕松創建數據URL.
代碼如下:
function data_uri($file, $mime) {
? $contents=file_get_contents($file);
? $base64=base64_encode($contents);
? echo $base64";
}
PHP實例六、從服務器上下載&保留一個遠程圖片
PHP實例 當你在搭建網站時,從遠程服務器下載某張圖片并且將其保留在自己的服務器上,這一操作會經常用到.代碼如下：
代碼如下:
$image = file_get_contents('http://www.url.com/image.jpg');
file_put_contents('/images/image.jpg', $image); //Where to save the image
PHP實例七、移除Remove Microsoft Word HTML Tag
PHP實例 當你使用Microsoft Word會創建許多Tag,比如font,span,style,class等.這些標簽對于Word本身而言是非常有用的,但是當你從Word粘貼至網頁時,你會發現很多無用的Tag.因此,下面的這段代碼可贊助你刪除所有無用的Word HTML Tag.
代碼如下:
function cleanHTML($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 $html
}
[code]
PHP實例八、檢測瀏覽器語言
如果你的網站上有多種語言,那么可以使用這段代碼作為默認的語言來檢測瀏覽器語言.該段代碼將返回瀏覽器客戶端使用的初始語言.
PHP實例[code]
function get_client_language($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;
}
PHP實例九、顯示Facebook 粉絲數量
如果你的網站或者博客上有內鏈的Facebook頁面,你或許想知道擁有多少粉絲.這段代碼將贊助你查看Facebook粉絲數,記住,別忘了在你的頁面ID第二行添加該段代碼.
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實例以上9個超級實用經典的PHP代碼非常的好用,小伙伴們參考下自由發揮,稍作修改就可以用到本身的項目中了.
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