当你在发送邮件时,你或许很想知道该邮件是否被对方已阅读。这里有段很是有趣的代码片断可以显示对方IP地址记录阅读的实际日期和时间。php
<?
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
);
?>
html
一段伟大的代码片断可以轻松的从网页中提取关键字。web
$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
);
api
使用DOM,你能够轻松从任何页面上抓取连接,代码示例以下:数组
$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 />'
;
}
浏览器
在WordPress中,若是你想自动转换URL,跳转至超连接页面,你能够利用内置的函数make_clickable()执行此操做。若是你想基于WordPress以外操做该程序,那么你能够参考wp-includes/formatting.php源代码。服务器
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];
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
$ret
;
}
dom
数据URL能够直接嵌入到HTML/CSS/JS中,以节省大量的 HTTP请求。 下面的这段代码可利用$file轻松建立数据URL。ide
function
data_uri(
$file
,
$mime
) {
$contents
=
file_get_contents
(
$file
);
$base64
=
base64_encode
(
$contents
);
echo
"data:$mime;base64,$base64"
;
}
当你在搭建网站时,从远程服务器下载某张图片而且将其保存在本身的服务器上,这一操做会常常用到。代码以下:函数
file_put_contents
(
'/images/image.jpg'
,
$image
);
//Where to save the image
当你使用Microsoft Word会建立许多Tag,好比font,span,style,class等。这些标签对于Word自己而言是很是有用的,可是当你从Word粘贴至网页时,你会发现不少无用的Tag。所以,下面的这段代码可帮助你删除全部无用的Word HTML Tag。
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
}
若是你的网站上有多种语言,那么能够使用这段代码做为默认的语言来检测浏览器语言。该段代码将返回浏览器客户端使用的初始语言。
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
;
}
若是你的网站或者博客上有内链的Facebook页面,你或许想知道拥有多少粉丝。这段代码将帮助你查看Facebook粉丝数,记住,别忘了在你的页面ID第二行添加该段代码。
<?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
;
/**
* 对数据进行编码转换
* @param array/string $data 数组
* @param string $output 转换后的编码
*/
function array_iconv($data, $output = 'utf-8') {
$encode_arr = array('UTF-8','ASCII','GBK','GB2312','BIG5','JIS','eucjp-win','sjis-win','EUC-JP');
$encoded = mb_detect_encoding($data, $encode_arr);
if (!is_array($data)) {
return mb_convert_encoding($data, $output, $encoded);
}
else {
foreach ($data as $key=>$val) {
$key = array_iconv($key, $output);
if(is_array($val)) {
$data[$key] = array_iconv($val, $output);
} else {
$data[$key] = mb_convert_encoding($data, $output, $encoded);
}
}
return $data;
}
}
?>
serialize unserialize
优点对数据值格式没有要求,不会出现解析错误等问题