10 Super Useful PHP code samples that must be collected ____php

As a normal programmer, several languages are very normal, I believe that most programmers will also write a few PHP programs, if the Web programmer, PHP must be necessary, even if you do not use it to develop large software projects, but also how much understand its syntax.

Although PHP is often criticized, being belittled, being a joke, it turns out that PHP is the most widely used programming language in web development around the world. PHP's biggest drawback is too simple, grammar is not rigorous, the framework system is weak, but this is its biggest advantage, a bit of programming background of ordinary people, only need to learn PHP half-day time, you can start to develop Web applications.

Some of the features of several programming languages have been summed up on the internet, and I find it quite reasonable:

PHP is: Quick and Dirty
Java is: Beauty and slowly
Ruby is: Quick and Beauty
Python is: Quick and simple

In the popular popularity of PHP, the Internet summed up a lot of practical PHP code snippets, these snippets in when you encounter similar problems, paste the past can be used, very efficient, very time-saving. It is a good habit of a learning programmer to put the good code of these programmers ' predecessors into their knowledge base.

One, blacklist filtration

function Is_spam ($text, $file, $split = ': ', $regex = False) {

$handle = fopen ($file, ' RB ');

$contents = Fread ($handle, FileSize ($file));

Fclose ($handle);

$lines = Explode ("n", $contents);

$arr = Array ();

foreach ($lines as $line) {

List ($word, $count) = Explode ($split, $line);

if ($regex)

$arr [$word] = $count;

Else

$arr [Preg_quote ($word)] = $count;

}

Preg_match_all ("~". Implode (' | ', Array_keys ($arr)). " ~ ", $text, $matches);

$temp = Array ();

foreach ($matches [0] as $match) {

if (!in_array ($match, $temp)) {

$temp [$match] = $temp [$match] + 1;

if ($temp [$match] >= $arr [$word])

return true;

}

}

return false;

}

$file = ' spam.txt ';

$str = ' This string has cat, dog word ';

if (Is_spam ($str, $file))

Echo ' This is spam ';

Else

Echo ' is not spam ';

Ab:3

Dog:3

Cat:2

Monkey:2

Second, random color generator

function Randomcolor () {

$str = ' # ';

for ($i = 0; $i < 6; $i + +) {

$randNum = rand (0, 15);

Switch ($randNum) {

Case: $randNum = ' A '; Break

Case one: $randNum = ' B '; Break

Case: $randNum = ' C '; Break

Case: $randNum = ' D '; Break

Case: $randNum = ' E '; Break

Case: $randNum = ' F '; Break

}

$str. = $randNum;

}

return $str;

}

$color = Randomcolor ();

Third, download files from the network

Set_time_limit (0);

Supports all file types

URL here:

$url = ' http://somsite.com/some_video.flv ';

$pi = PathInfo ($url);

$ext = $pi [' extension '];

$name = $pi [' filename '];

Create a new CURL resource

$ch = Curl_init ();

Set URL and other appropriate options

curl_setopt ($ch, Curlopt_url, $url);

curl_setopt ($ch, Curlopt_header, false);

curl_setopt ($ch, Curlopt_binarytransfer, true);

curl_setopt ($ch, Curlopt_autoreferer, true);

curl_setopt ($ch, curlopt_followlocation, true);

curl_setopt ($ch, Curlopt_returntransfer, true);

Grab URL and pass it to the browser

$opt = curl_exec ($ch);

Close CURL Resource.

Curl_close ($ch);

$saveFile = $name. $ext;

if (Preg_match ("/[^0-9a-z._-]/i", $saveFile))

$saveFile = MD5 (Microtime (TRUE)). $ext;

$handle = fopen ($saveFile, ' WB ');

Fwrite ($handle, $opt);

Fclose ($handle);

Four, Alexa/google Page Rank

function Page_rank ($page, $type = ' Alexa ') {

Switch ($type) {

Case ' Alexa ':

$url = ' http://alexa.com/siteinfo/';

$handle = fopen ($url. $page, ' R ');

Break

Case ' Google ':

$url = ' http://google.com/search?client=navclient-auto&ch=6-1484155081&features=Rank&q=info: ';

$handle = fopen ($url. ' http://'. $page, ' R ');

Break

}

$content = Stream_get_contents ($handle);

Fclose ($handle);

$content = Preg_replace ("~ (n|t|ss+) ~", ", $content);

Switch ($type) {

Case ' Alexa ':

if (Preg_match (' ~<div class= data (down|up) > (. +?) </div>~im ', $content, $matches)) {

return $matches [2];

}else{

return FALSE;

}

Break

Case ' Google ':

$rank = Explode (': ', $content);

if ($rank [2]!= ')

return $rank [2];

Else

return FALSE;

Break

Default

return FALSE;

Break

}

}

Alexa Page Rank:

Echo ' Alexa Rank: '. Page_rank (' techug.com ');

Echo '

';

Google Page Rank

Echo ' Google Rank: '. Page_rank (' techug.com ', ' Google ');

V. Force download files

$filename = $_get[' file ']; Get the Fileid from the URL

Query the file ID

$query = sprintf ("SELECT * FROM tablename WHERE id = '%s '", Mysql_real_escape_string ($filename));

$sql = mysql_query ($query);

if (mysql_num_rows ($sql) > 0) {

$row = Mysql_fetch_array ($sql);

Set some headers

Header ("Pragma:public");

Header ("expires:0");

Header ("Cache-control:must-revalidate, Post-check=0, pre-check=0");

Header ("Content-type:application/force-download");

Header ("Content-type:application/octet-stream");

Header ("Content-type:application/download");

Header ("content-disposition:attachment; Filename= ". basename ($row [' FileName ']).";

Header ("Content-transfer-encoding:binary");

Header ("Content-length:" FileSize ($row [' FileName ']));

@readfile ($row [' FileName ']);

Exit (0);

}else{

Header ("Location:/");

Exit

}

Six, by email to display the user's Gravatar avatar

$gravatar _link = ' http://www.gravatar.com/avatar/'. MD5 ($comment _author_email). ' S=32 ';

Echo ' ';