本文提供了一系列有用的PHP代码片段，包括查找经纬度距离、cURL功能完善、用户输入清理、地理位置检测、密码强度设置等，旨在帮助开发者节省时间并提升工作效率。
还记得优快云研发频道此前发表过的一篇《可以直接拿来用的15个jQuery代码片段》吗？本文笔者将继续为你奉上10个超级有用的PHP代码片段。
PHP是一种HTML内嵌式的语言，是一种在服务器端执行的嵌入HTML文档的脚本语言。PHP拥有数以百计的基本功能，支持上千种扩展。这些功能都被很好的加载在PHP站点上，但内置的库有各种各样的命名。在PHP代码库中包含了无数个有用的PHP代码片段，每位开发者都需要不断完善自己的“工具箱”。有了这些代码片段可以为你节省大量的时间，一起来看下。
1.查找Longitudes与Latitudes之间的距离
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function
getDistanceBetweenPointsNew($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;
return
compact(
'miles'
,
'feet'
,
'yards'
,
'kilometers'
,
'meters'
);
}
$point1 = array(
'lat'
=> 40.770623,
'long'
=> -73.964367);
$point2 = array(
'lat'
=> 40.758224,
'long'
=> -73.917404);
$distance = getDistanceBetweenPointsNew($point1[
'lat'
], $point1[
'long'
], $point2[
'lat'
], $point2[
'long'
]);
foreach ($distance as $unit => $value) {
echo $unit.
': '
.number_format($value,4).
'
'
;
}
The example returns the following:
miles: 2.6025
feet: 13,741.4350
yards: 4,580.4783
kilometers: 4.1884
meters: 4,188.3894
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2.完善cURL功能
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function
xcurl($url,$ref=
null
,$post=array(),$ua=
"Mozilla/5.0 (X11; Linux x86_64; rv:2.2a1pre) Gecko/20110324 Firefox/4.2a1pre"
,$print=
false
) {
$ch = curl_init();
curl_setopt($ch, CURLOPT_AUTOREFERER,
true
);
if
(!empty($ref)) {
curl_setopt($ch, CURLOPT_REFERER, $ref);
}
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
if
(!empty($ua)) {
curl_setopt($ch, CURLOPT_USERAGENT, $ua);
}
if
(count($post) > 0){
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post);
}
$output = curl_exec($ch);
curl_close($ch);
if
($print) {
print($output);
}
else
{
return
$output;
}
}
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3.清理用户输入
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]*?>.*?@si
', // Strip out javascript
'
@<[\/\!]*?[^<>]*?>@si
', // Strip out HTML tags
'
@]*?>.*?@siU
', // Strip style tags properly
'
@@
' // Strip multi-line comments
);
$output = preg_replace($search, '
', $input);
return
$output;
}
?>
$val) {
$output[$
var
] = sanitize($val);
}
}
else
{
if
(get_magic_quotes_gpc()) {
$input = stripslashes($input);
}
$input = cleanInput($input);
$output = mysql_real_escape_string($input);
}
return
$output;
}
?>
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4.通过IP（城市、国家）检测地理位置
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function
detect_city($ip) {
$
default
=
'Hollywood, CA'
;
if
(!is_string($ip) || strlen($ip) < 1 || $ip ==
'127.0.0.1'
|| $ip ==
'localhost'
) $ip =
'8.8.8.8'
; $curlopt_useragent =
'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2) Gecko/20100115 Firefox/3.6 (.NET CLR 3.5.30729)'
; $url =
'http://ipinfodb.com/ip_locator.php?ip='
. urlencode($ip); $ch = curl_init(); $curl_opt = array( CURLOPT_FOLLOWLOCATION => 1,
CURLOPT_HEADER => 0,
CURLOPT_RETURNTRANSFER => 1,
CURLOPT_USERAGENT => $curlopt_useragent,
CURLOPT_URL => $url,
CURLOPT_TIMEOUT => 1,
);
curl_setopt_array($ch, $curl_opt);
$content = curl_exec($ch);
if
(!is_null($curl_info)) {
$curl_info = curl_getinfo($ch);
}
curl_close($ch);
if
( preg_match(
'{
City : ([^<]*)
}i'
, $content, $regs) ) { $city = $regs[1]; }
if
( preg_match(
'{
State/Province : ([^<]*)
}i'
, $content, $regs) ) { $state = $regs[1]; }
if
( $city!=
''
&& $state!=
''
){ $location = $city .
', '
. $state;
return
$location; }
else
{
return
$
default
; } }
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5.设置密码强度
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100){
$strength = 100;
}
return
$strength;
}
var_dump(password_strength(
"Correct Horse Battery Staple"
));
echo
"
"
;
var_dump(password_strength(
"Super Monkey Ball"
));
echo
"
"
;
var_dump(password_strength(
"Tr0ub4dor&3"
));
echo
"
"
;
var_dump(password_strength(
"abc123"
));
echo
"
"
;
var_dump(password_strength(
"sweet"
));
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6.检测浏览器语言，只提供可用的$availableLanguages作为数组(‘en’, ‘de’, ‘es’)
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function
get_client_language($availableLanguages, $
default
=
'en'
){
if
(isset($_SERVER[
'HTTP_ACCEPT_LANGUAGE'
])) {
$langs=explode(
','
,$_SERVER[
'HTTP_ACCEPT_LANGUAGE'
]);
//start going through each one
foreach ($langs as $value){
$choice=substr($value,0,2);
if
(in_array($choice, $availableLanguages)){
return
$choice;
}
}
}
return
$
default
;
}
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7.创建数据URL
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function
data_uri($file, $mime) {
$contents=file_get_contents($file);
$base64=base64_encode($contents);
echo
"data:$mime;base64,$base64"
;
}
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8.创建更加友好的页面标题SEO URL
输入示例：$title = “This foo’s bar is rockin’ cool!”; echo makeseoname($title); //RETURNS: //this-foos-bar-is-rockin-cool
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function
make_seo_name($title) {
return
preg_replace(
'/[^a-z0-9_-]/i'
,
''
, strtolower(str_replace(
' '
,
'-'
, trim($title))));
}
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9.终极加密功能
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// f(ucking) u(ncrackable) e(ncryption) function by BlackHatDBL (www.netforme.net)
function
fue($hash,$times) {
// Execute the encryption(s) as many times as the user wants
for
($i=$times;$i>0;$i--) {
// Encode with base64...
$hash=base64_encode($hash);
// and md5...
$hash=md5($hash);
// sha1...
$hash=sha1($hash);
// sha256... (one more)
$hash=hash(
"sha256"
, $hash);
// sha512
$hash=hash(
"sha512"
, $hash);
}
// Finaly, when done, return the value
return
$hash;
}
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10a.Tweeter Feed Runner——使用任意twitter名，可在任意页面上加载用户资源。
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pversion;
}
public
function
loadTimeline($user, $max = 20){
$
this
->twitURL .=
'statuses/user_timeline.xml?screen_name='
.$user.
'&count='
.$max;
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $
this
->twitURL);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,
true
);
$
this
->xml = curl_exec($ch);
return
$
this
;
}
public
function
getTweets(){
$
this
->twitterArr = $
this
->getTimelineArray();
$tweets = array();
foreach($
this
->twitterArr->status as $status){
$tweets[$status->created_at->__toString()] = $status->text->__toString();
}
return
$tweets;
}
public
function
getTimelineArray(){
return
simplexml_load_string($
this
->xml);
}
public
function
formatTweet($tweet){
$tweet = preg_replace(
"/(http(.+?))( |$)/"
,
"$1$3"
, $tweet);
$tweet = preg_replace(
"/#(.+?)(\h|\W|$)/"
,
"#$1$2"
, $tweet);
$tweet = preg_replace(
"/@(.+?)(\h|\W|$)/"
,
"@$1$2"
, $tweet);
return
$tweet;
}
}
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10b. Tweeter Feed Runner——用于在主题中创建文件，比如：example.php
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loadTimeline(
"phpsnips"
)->getTweets();
foreach($feed as $time => $message){
echo
"<div class='tweet'>"
.$twitter->formatTweet($message).
"<br />At: "
.$time.
"</div>"
;
}
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