Pomagalnik » PHP

Različne pozicije oglasov

Jiga — Mon, 01 Feb 2010 22:36:43 +0000

Če na svojem blogu ali strani uporabljamo oglase enakih velikosti je priporočljivo uporabiti "random" oz. naključno pozicioniranje. Tako nobenega oglasa ne preferiramo in sama stran pa deluje bolj dinamično.

Za naključno pozicioniranje bomo uporabili PHP funkciji "range" in "shuffle". Prva funkcija nam določi območje, druga pa dano območje premeša.

Primer naključnih slik

$oglasi = range(1, 4);
shuffle($oglasi);
foreach ($oglasi as $oglas) {
echo "
";
}
?>

Primer naključnih slik s povezavami

$a1 = "
";
$a2 = "
";
$a3 = "
";
$a4 = "
";

$oglasi = range(1, 4);
shuffle($oglasi);
foreach ($oglasi as $oglas) {
echo ${a.$oglas};
}
?>

Uporabne povezave:
http://php.net/manual/en/function.shuffle.php
http://php.net/manual/en/function.range.php
http://php.net/manual/en/function.rand.php

Upravljanje domen preko ASP ali PHP datotek na strežniku

Jiga — Fri, 29 Jan 2010 05:33:59 +0000

Velikokrat naletimo na strežnik, kjer .htaaccess ni na voljo. Takrat si lahko pomagamo s pomočjo programske kode, ki je lahko napisana v ASP ali PHP jeziku. Slednje nam nadomestijo .htaccess datoteke in lahko upravljajo z domenami in izvršijo določene ukaze.

Programska koda najprej preveri preko katere domene uporabnik dostopa. Na podlagi te informacije uporabnika preusmeri v določeno mapo, kjer se nahaja iskano spletno mesto oziroma se lahko izvrši tudi kakšen drug ukaz.

ASP primer - koda preveri na katero domeno uporabnik prihaja, če je v izbrani domeni beseda pomagalnik ga preusmeri v podmapo "blog".

<%
sname = Request.ServerVariables("SERVER_NAME")
sname = ucase(sname)
if InStr(sname,"pomagalnik") <> 0 then
response.redirect "blog"
end if
%>

PHP primer - koda preveri, če uporabnik prihaja na pomagalnik.com ali www.pomagalnik.com in ga preusmeri v podmapo "blog".

if (($_SERVER['HTTP_HOST'] == "pomagalnik.com") || ($_SERVER['HTTP_HOST'] == "www.pomagalnik.com"))
{
header('Location: /blog/');
}
?>

ASP prevajalnik – ASP v PHP

Jiga — Thu, 21 Jan 2010 00:34:54 +0000

ASP prevajalnik je brezplačna "on-line" aplikacija za prevajanje ASP kode v PHP kodo. Prihrani nam lahko več ur dela pri prevajanju obstoječih programov napisanih v ASP kodi. Pretvarja komentarje, spremenljivke, if stavke, zanke in še mnogo drugih.

Za uporabo aplikacije se morate samo registrirati na spletni strani http://www.design215.com/toolbox/translator/trans_login.php.

ASP/PHP referenčna lista

Jiga — Thu, 21 Jan 2010 00:28:29 +0000

ASP/PHP referenčna lista ni ravno popolna, ampak bo zadovoljila večino potreb pri pretvarjanju ASP v PHP ali obratno. Ker ima PHP že veliko "vgrajenih" ukazov se bo velikokrat več vrstic ASP kode spremenilo v samo eno vrstico PHP kode.

ASP (VBScript)	PHP (v4.3+)
General syntax
ASP Comments, inline 'my dog has fleas	PHP Comments, inline //my dog has fleas
ASP Comments, block not available?	PHP Comments, block /* The quick brown fox jumped over the lazy dogs. */
ASP, Escaping quotes "" "var text1="""";"	PHP, Escaping quotes \" or use ' like javascript 'var text1="";';
ASP Command termination None, but : can beused to separate commands on the same line.	PHP Command termination Each commandmust end with ; but multiple commands per line are allowed.
ASP Screen output response.write "hello"	PHP Screen output echo "hello";
ASP Newline characters vbCrLf response.write "hello" & vbCrLf	PHP Newline characters "\n" echo "hello \n"; (must be inside "", not '')
ASP Variable Names Not case sensitive, so fName is the same as FNAME	PHP Variable Names Case sensitive AND must begin with $so $fName is NOT the same as $FNAME
String Functions
ASP String concatenation & fname=name1 & " " & name2 emsg=emsg & "error!"	PHP String concatenation . and .= $fname=$name1." ".$name2; $emsg.="error!";
ASP, Change case LCase(), UCase() lowerName=LCase(chatName) upperName=UCase(chatName)	PHP, Change case strtolower(), strtoupper() $lowerName=strtolower($chatName); $upperName=strtoupper($chatName);
ASP String length Len() n=Len(chatName)	PHP String length strlen() $n=strlen($chatName);
ASP, Trim whitespace Trim() temp=Trim(xpage)	PHP, Trim whitespace trim() and also ltrim(), rtrim() $temp=trim($xpage);
ASP String sections Left(), Right(), Mid() Left("abcdef",3) result = "abc" Right("abcdef",2) result = "ef" Mid("abcdef",3) result = "cdef" Mid("abcdef",2,4) result = "bcde"	PHP String sections substr() substr("abcdef",0,3); result = "abc" substr("abcdef",-2); result = "ef" substr("abcdef",2); result = "cdef" substr("abcdef",1,4); result = "bcde"
ASP String search forward, reverse Instr(), InstrRev() x=Instr("abcdef","de") x=4 x=InstrRev("alabama","a") x=7	PHP String search forward, reverse strpos(), strrpos() $x=strpos("abcdef","de"); x=3 $x=strrpos("alabama","a"); x=6
ASP String replace Replace(string exp, temp=Replace(temp,"orange","apple") temp=Replace(temp,"'","\'") temp=Replace(temp,"""","\""") search,replace)	PHP String replace str_replace $temp=str_replace("orange","apple",$temp); $temp=str_replace("'","\'",$temp); $temp=str_replace("\"","\\\"",$temp); (search,replace,string exp)
ASP, split a string into an array Split() temp="cows,horses,chickens" farm=Split(temp,",",-1,1) x=farm(0)	PHP, split a string into an array explode() $temp="cows,horses,chickens"; $farm=explode(",",$temp); $x=$farm[0];
ASP, convert ASCII to String x=Chr(65) x="A"	PHP, convert ASCII to String $x=chr(65); x="A"
ASP, convert String to ASCII x=Asc("A") x=65	PHP, convert String to ASCII $x=ord("A") x=65
Control Structures
ASP, if statements if x=100 then x=x+5 elseif x<200 then x=x+2 else x=x+1 end if	PHP, if statements if ($x==100) { $x=$x+5; } else if ($x<200) { $x=$x+2; } else { $x++; }
ASP, for loops for x=0 to 100 step 2 if x>p then exit for next	PHP, for loops for ($x=0; $x<=100; $x+=2) { if ($x>$p) {break;} }
ASP, while loops do while x<100 x=x+1 if x>p then exit do loop	PHP, while loops while ($x<100) { $x++; if ($x>$p) {break;} }
ASP, branching select case chartName case "TopSales" theTitle="Best Sellers" theClass="S" case "TopSingles" theTitle="Singles Chart" theClass="S" case "TopAlbums" theTitle="Album Chart" theClass="A" case else theTitle="Not Found" end select	PHP, branching switch ($chartName) { case "TopSales": $theTitle="Best Sellers"; $theClass="S"; break; case "TopSingles": $theTitle="Singles Chart"; $theClass="S"; break; case "TopAlbums": $theTitle="Album Chart"; $theClass="A"; break; default: $theTitle="Not Found"; }
ASP functions Function myFunction(x) myFunction = x*16 'Return value End Function	PHP functions function myFunction($x) { return $x*16; //Return value }
HTTP Environment
ASP, Server variables Request.ServerVariables("SERVER_NAME") Request.ServerVariables("SCRIPT_NAME") Request.ServerVariables("HTTP_USER_AGENT") Request.ServerVariables("REMOTE_ADDR") Request.ServerVariables("HTTP_REFERER")	PHP, Server variables $_SERVER["HTTP_HOST"]; $_SERVER["PHP_SELF"]; $_SERVER["HTTP_USER_AGENT"]; $_SERVER["REMOTE_ADDR"]; @$_SERVER["HTTP_REFERER"]; @ = ignore errors
ASP Page redirects Response.redirect("wrong_link.htm")	PHP Page redirects header("Location: wrong_link.htm");
ASP, GET and POST variables Request.QueryString("chat") Request.Form("username")	PHP, GET and POST variables @$_GET["chat"]; @ = ignore errors @$_POST["username"];
ASP, prevent page caching Response.AddHeader "pragma","no-cache" Response.CacheControl="no-cache"	PHP, prevent page caching header("Cache-Control: no-store, no-cache"); header("Pragma: no-cache");
ASP, Limit script execution time, in seconds Server.ScriptTimeout(240)	PHP, Limit script execution time, in seconds set_time_limit(240);
ASP, Timing script execution s_t=timer ...ASP script to be timed... duration=timer-s_t response.write duration &" seconds"	PHP, Timing script execution $s_t=microtime(); ...PHP script to be timed... $duration=microtime_diff($s_t,microtime()); $duration=sprintf("%0.3f",$duration); echo $duration." seconds"; //required function function microtime_diff($a,$b) { list($a_dec,$a_sec)=explode(" ",$a); list($b_dec,$b_sec)=explode(" ",$b); return $b_sec-$a_sec+$b_dec-$a_dec; }
File System Functions
ASP, create a file system object (second line is wrapped) 'Required for all file system functions fileObj=Server.CreateObject ("Scripting.FileSystemObject")	PHP, create a file system object Not necessary in PHP
ASP, check if a file exists pFile="data.txt"fileObj.FileExists(Server.MapPath(pFile))	PHP, check if a file exists $pFile="data.txt";file_exists($pFile);
ASP, Read a text file pFile="data.txt" xPage=fileObj.GetFile(Server.MapPath(pFile)) xSize=xPage.Size 'Get size of file in bytes xPage=fileObj. OpenTextFile(Server.MapPath(pFile)) temp=xPage.Read(xSize) 'Read file linkPage.Close	PHP, Read a text file $pFile="data.txt"; $temp=file_get_contents($pFile); //Read file
Time and Date Functions
ASP, Server Time or Date Now, Date, Time	PHP, Server Time or Date date()
ASP, Date format (default) Now = 1/20/2010 6:58:29 PM Time = 6:58:29 PM Various ASP functions extract date parts: Month(Date) = 1 MonthName(Month(Date)) = January Day(Date) = 20 WeekdayName(Weekday(Date)) = Wednesday WeekdayName(Weekday(Date),False) = Wed Date = 1/20/2010	PHP, Date format There is no default The date() function is formatted using codes: date("n/j/Y g:i:s A") = 1/20/2010 6:58:29 PM date("n") = 1 date("F") = January date("j") = 20 date("l") = Wednesday date("D") = Wed format in PHP.
Numeric Functions
ASP, convert decimal to integer Int() n=Int(x)	PHP, convert decimal to integer floor() $n=floor($x);
ASP, determine if a value is numeric IsNumeric() if IsNumeric(n) then ...	PHP, determine if a value is numeric if (is_numeric($num)) {...} is_numeric()
ASP, modulus function x mod y	PHP, modulus function $x % $y

Vir: http://www.design215.com/toolbox/asp.php

PHP – RSS prikazovalnik

Jiga — Thu, 17 Dec 2009 23:33:43 +0000

V članku bo predstavljena PHP koda za RSS reader oziroma prikazovalnik RSS virov. PHP koda potrebuje tudi PHP knjižnico za branje RSS virov.

PHP knjižnica - rsslib.php



*/

$RSS_Content = array();

function RSS_Tags($item, $type)
{
		$y = array();
		$tnl = $item->getElementsByTagName("title");
		$tnl = $tnl->item(0);
		$title = $tnl->firstChild->textContent;

		$tnl = $item->getElementsByTagName("link");
		$tnl = $tnl->item(0);
		$link = $tnl->firstChild->textContent;

		$tnl = $item->getElementsByTagName("description");
		$tnl = $tnl->item(0);
		$description = $tnl->firstChild->textContent;

		$y["title"] = $title;
		$y["link"] = $link;
		$y["description"] = $description;
		$y["type"] = $type;

		return $y;
}

function RSS_Channel($channel)
{
	global $RSS_Content;

	$items = $channel->getElementsByTagName("item");

	// Processing channel

	$y = RSS_Tags($channel, 0);	 // get description of channel, type 0
	array_push($RSS_Content, $y);

	// Processing articles

	foreach($items as $item)
	{
		$y = RSS_Tags($item, 1); // get description of article, type 1
		array_push($RSS_Content, $y);
	}
}

function RSS_Retrieve($url)
{
	global $RSS_Content;

	$doc  = new DOMDocument();
	$doc->load($url);

	$channels = $doc->getElementsByTagName("channel");

	$RSS_Content = array();

	foreach($channels as $channel)
	{
		 RSS_Channel($channel);
	}

}

function RSS_RetrieveLinks($url)
{
	global $RSS_Content;

	$doc  = new DOMDocument();
	$doc->load($url);

	$channels = $doc->getElementsByTagName("channel");

	$RSS_Content = array();

	foreach($channels as $channel)
	{
		$items = $channel->getElementsByTagName("item");
		foreach($items as $item)
		{
			$y = RSS_Tags($item, 1);
			array_push($RSS_Content, $y);
		}

	}

}

function RSS_Links($url, $size = 15)
{
	global $RSS_Content;

	$page = "";

	RSS_RetrieveLinks($url);
	if($size > 0)
		$recents = array_slice($RSS_Content, 0, $size + 1);

	foreach($recents as $article)
	{
		$type = $article["type"];
		if($type == 0) continue;
		$title = $article["title"];
		$link = $article["link"];
		$page .= "$title\n";
	}

	$page .="\n";

	return $page;

}

function RSS_Display($url, $size = 15, $site = 0)
{
	global $RSS_Content;

	$opened = false;
	$page = "";
	$site = (intval($site) == 0) ? 1 : 0;

	RSS_Retrieve($url);
	if($size > 0)
		$recents = array_slice($RSS_Content, $site, $size + 1 - $site);

	foreach($recents as $article)
	{
		$type = $article["type"];
		if($type == 0)
		{
			if($opened == true)
			{
				$page .="\n";
				$opened = false;
			}
			$page .="";
		}
		else
		{
			if($opened == false)
			{
				$page .= "\n";
				$opened = true;
			}
		}
		$title = $article["title"];
		$link = $article["link"];
		$description = $article["description"];
		$page .= "$title";
		if($description != false)
		{
			$page .= "
$description";
		}
		$page .= "\n";			

		if($type==0)
		{
			$page .="
";
		}

	}

	if($opened == true)
	{
		$page .="\n";
	}
	return $page."\n";

}

?>

Koda za izpis zadnjih 10 objav RSS vira

require_once("rsslib.php");
$url = "http://www.pomagalnik.com/feed/";
echo RSS_Links($url, 10);
?>

Vir za PHP RSS knjižnico http://www.scriptol.com/rss/rsslib.txt

Uporabi PHP v WordPress zapisu, strani ali Widget sidebar-u

Jiga — Sat, 03 Oct 2009 05:06:36 +0000

Če se srečujete s težavo, kako umestiti PHP kodo v določen zapis, stran ali widget potem je PHPEXEC pravi "plug-in" za vas.

"Plug-in" se namesti in aktivira po klasičnem postopku za WordPress. Primer uporabe kode je prikazan spodaj.

echo "Test PHP-ja. ";
?>

Več informacij o PHPEXEC-ju lahko najdete na: http://www.hongkiat.com/blog/execute-php-in-wordpress-post-page-and-widget-sidebar/

"Plug-in" za novejše verzije WordPressa: http://activeblogging.com/info/phpexec-2/

Skriptni jezik PHP

Jiga — Tue, 23 Dec 2008 09:03:50 +0000

PHP je zelo razširjen skriptni jezik namenjen za razvoj spletnih strani. Skripte vključujemo v HTML strani. PHP uporablja znački in zaključimo z ?>.

Primer PHPja:

PHP Test

Hello World

'; ?>

Izpis:

PHP Test

Hello World

Več informacij
http://sl.wikipedia.org/wiki/Php