Easy Tutorials » PHP

Php error handling

krates — Tue, 27 May 2008 05:04:36 +0000

Sometimes we need to set our own errors rather than the default one like this.

Warning: fopen(test.txt) [function.fopen]: failed to open stream: No such file or directory in http://localhost/index.php on line 2

it is good when you create scripts and sell

Creating a basic error handler using the die function !!

if(!file_exists(“text.txt”))
{
die(“File does not exist”);
}
else
{
$file=fopen(“text.txt”,”r”);
}
?>

Set error handler

Error handlers are set using

set_error_handler(“MyErrors”);

Syntax:

function myerror($var1, $var2)
{
echo “Error: [$var1] $var2″;
}

set_error_handler(“myerror”);

echo($var);
?>

Error will be

Error: [8] Undefined variable: var

Thanks

krates

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opening and extracting a zip file

krates — Thu, 01 May 2008 13:47:59 +0000

Well zipping is not a php function. For the zipping functions to work on your server you must download the

Download the ZZIPlib library

Download the Zip PELC extension

And install them ( find the instruction there only on how to )

The example i am going to tell is a simple one

$zipfile = new ZipArchive;
$zipfile->open(‘file.zip’);
$zipfile->extractTo(‘./’);
$zipfile->close();
echo “the requested file has been extracted”;
?>

open = open the specified zip file inside the braces

extractTo = extract the opened zip file to the location specified

close = closes a zip file

Thanks

krates

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Free Search Engine For Your Site

krates — Sun, 17 Feb 2008 12:59:31 +0000

TSEP is a simple, yet very powerful and fast PHP website search engine. It is built to index your site so it can be searched later within seconds. Some features: your own stopwords, logging, MySQL Boolean search, many languages, CSS formating.

Overview

TSEP is a search engine for a website – for your website!
You can put a “Search this site” anywhere on your website and let people quickly find what they are looking for.
TSEP is free of charge and open source software.
TSEP is designed to be very easy to install and use.
TSEP can be implemented into your layout (there is also a pre-made search page available)
With only two lines of code you can add TSEP to your website and into your layout!
TSEP uses CSS for formatting.
You can adjust any color, font, anything of the look to your needs.
TSEP uses indexing profiles.
The profiles enable you to split the indexing (and in future also the searching) process.
TSEP is localized!
This means if you are running a website in the English language you will probably want to show the search page as well in English – you can do this with TSEP very easily. If you are running a website in German you can see the TSEP messages in German. French, Spanish, Italian, Thai, Chinese, Russian… . None of those should be a problem for TSEP.
TSEP supports (MySQL-) Boolean search terms.

Website – http://tsep.info/cms/
Thanks

krates

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Echoing the user input through php

krates — Fri, 01 Feb 2008 16:05:30 +0000

Php is very powerful when it comes to handling of forms. It can check user input check for illegal characters and can also help in uploading of files. Which i am going to teach you in later chapters. But for today we are going to study how to how to echo user input.

form.php

process.php

$something=”$_['textfield']“;

echo $something;

Thanks

krates

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Displaying random advertisement through php

krates — Tue, 01 Jan 2008 09:07:50 +0000

Sometimes you want to display something randomlythis tutorial is going to teach how to display two company advertisement on the same page like google and bidvertiser.

Syntax:

Untitled Document

$a = rand (1,2);

if ($a == “1″) {

?>

}

if ($a == “2″) {

?>

}

?>

You must have understand now that we assign a randomly between 1 and 2 and then check if a = 1 then display google advertisement and if a = 2 then display bidvertiser advertisement.

Thanks

krates

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Connecting to a database

krates — Wed, 19 Dec 2007 01:01:44 +0000

Connecting to a database through php is not a tough task.

First off all create a new sql database in phpmyadmin and see the privileges section in it for the user/pass by default it is

Username == “root”

Password == “”

In php you need this and your host name it is always localhost

Syntax:

$host = "localhost"; //Host name $username = "root"; // Username $pass = ""; //Password $dbname = "useless"; //Database Name

$connect = mysqli_connect ($host,$username,$pass,$dbname);
if(! $connect)
{
echo “unable to connect to the database”;
}
else{
echo “Connected to database”;
}
?>
The above script will connect you to the database note you must php 5
because it uses mysqli functions

Thanks
krates

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Using for each to loop through an array

krates — Sun, 16 Dec 2007 14:27:40 +0000

Sometimes you need to loop through an for this the for each function is used for example.

$grade = array(“first_name” => “First Name”,
“middle_name” => “Middle Name”,
“last_name” => “Last Name”,
“phone” => “Phone”);

foreach($grade as $field => $gard)
{
echo ”
$gard The name of the array $field

“;
}
?>

Notice the variable $grade arrays starting from first_name is given to $field and then the array value is given to label

U can use this in many forms

Thanks
krates

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Simple PHP navigation tutorial

bilalghouri — Fri, 14 Dec 2007 14:31:23 +0000

Html pages are boring. Everyone is using php navigations now, for example ?id=news etc., well its not all that complicated and since you are reading this I assume you would like to learn how to do it!

Note:

Your server must have php installed for this to work and your extensions should end in .php.

And on to the tutorial:

This is the basic code I use, you can copy it and put it on your page!

Note
This code would go in your main content area.

switch($id) {
default:
include(‘news.php’);
break;
case ‘about’ :
include(‘about.html’);
break;
}
?>

Thats it, however i will explain it in a bit more depth..

default:
include(‘news.php’);
break;

This is the main page you want to open when you load your website for most people its news and updates etc. This can be php or html or whatever.

case ‘about’ :
include(‘about.html’);
break;

This is the page you want to include next such as an about page etc. Keep adding the pages so you got all you need. Your code will look like something below:

switch($id) {
default:
include(‘news.php’);
break;
case ‘about’ :
include(‘about.html’);
break;
case ‘tutorials’ :
include(‘tutorials.php’);
break;
case ‘downloads’ :
include(‘downloads.html’);
break;
case ‘templates’ :
include(‘temps.html’);
break;
case ‘comming’ :
include(‘soon.html’);
break;
}
?>

Now if you are not completely lost yet this is what you do to link your pages, Change your links from About to About

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Sending a mail from your script

krates — Thu, 13 Dec 2007 10:52:33 +0000

Many a times you want to send a mail to someone through your website you can easily do that by the php inbuilt function mail

Syntax:

mail(to,subject,message,headers,parameters);

To: == The person email you are sending the mail to

Subject: == The subject of the email

Message: == The main email message can consist of the new line character ( \n ) tab character ( \t ) etc

Parameters: == Optional parameters

Creating the script to send a mail:

$to = “someone@someone.com”;

$subject = “Checking Mail Function”;

$message = “This is the body of the email.”;

$from = “something@something.com”;

$headers = “From: $from”;

mail($to,$subject,$message,$headers);

echo “Mail Sent.”;
?>

Now this script every time when it will run it will send a mail to the email someone@someone.com

You can add user input to it by using if , isset functions

Hint: isset is a function which checks that a form field is filled or not used in db functions also

Thanks

krates

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File upload in php

krates — Sat, 01 Dec 2007 07:21:54 +0000

If you want users to upload files you can do this by using php

HTML FILE

enctype=”multipart/form-data”>

The file of yours will now consist of a browse button through which a user can select the file he wants to upload

The upload.php will display the file information and upload the file to the folder upload

UPLOAD.PHP

if(isset($_FILES['upload'])){if ($_FILES["file"]["error"] > 0)
{
echo “Contain error ” . $_FILES["file"]["error"] . “
”;
}
else
{

echo “File name ” . $_FILES["file"]["name"] . “
”;
echo “File Type: ” . $_FILES["file"]["type"] . “
”;
echo “File size: ” . ($_FILES["file"]["size"] / 1024) . ” Kb
”;
echo “Temp file: ” . $_FILES["file"]["tmp_name"] . “
”;if (file_exists(“upload/” . $_FILES["file"]["name"]))
{
echo $_FILES["file"]["name"] . ” already exists. “;
}
else
{
move_uploaded_file($_FILES["file"]["tmp_name"],
“upload/” . $_FILES["file"]["name"]);
echo “Stored in: ” . “upload/” . $_FILES["file"]["name"];
}
}
}
else{
echo ‘where have you come from ha’;
}?>

Create both the files and upload to the server then create a folder named upload [important] Or else you will get error.

When done check

Thanks
krates

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Easy Tutorials » PHP

Php error handling

opening and extracting a zip file

Free Search Engine For Your Site

Overview

Echoing the user input through php

Displaying random advertisement through php

Untitled Document

$a = rand (1,2);

if ($a == “1″) {

?>

</h6> <h6><font color="#008000">src=”http://pagead2.googlesyndication.com/pagead/show_ads.js”></font></h6> <h6><font color="#008000">

}

if ($a == “2″) {

?>

<a href=”http://www.bidvertiser.com/bdv/BidVertiser/bdv_advertiser.dbm”>pay per click</a>

?>

Connecting to a database

Using for each to loop through an array

Simple PHP navigation tutorial

Sending a mail from your script

File upload in php

enctype=”multipart/form-data”>

if(isset($_FILES['upload'])){if ($_FILES["file"]["error"] > 0) { echo “Contain error ” . $_FILES["file"]["error"] . “”; } else {

if(isset($_FILES['upload'])){if ($_FILES["file"]["error"] > 0)
{
echo “Contain error ” . $_FILES["file"]["error"] . “
”;
}
else
{