Practical PHP by example Jan Leth-Kjaer

PRACTICAL PHP
BY EXAMPLE

Jan Leth-Kjaer

Scope and subjects
• This is not a PHP upcode class.
• This is not a Zend class.
• This is not an Power specific class.
• This is not about installation of
Apache.
• This is not about work management
of Pase, PHP or related areas.
• This is not a PHP security class.

So what is it then?
• I presume you all know some type of
programming and SQL.
• I presume you know HTML at some level.
• I presume you can or know a bit of PHP or
likewise programming languages.
• We will running through a number of practial
PHP examples and see the frontend as well as
the backend = code.

Data management

• MySQL – the database.
• Retrieve some data.
• Show the data.
• Give user functionality to enter/update data.
• Update the data in database.

Data management – go get it

<?php
session_start();
require("access.php"); // Variabler til mysql hentes
$resultat = mysql_query("SELECT * FROM customer WHERE customernumber = '$number'");
while ($row = mysql_fetch_array($resultat)) {
$CompanyName = $row['CompanyName'];
$Name = $row['Name'];
$email = $row['email'];
$Address1 = $row['Address1'];
$Address2 = $row['Address2'];
....
?>

......

<form action='index.php?page1=CustomerValidate.php method='post' enctype='multipart/form-data'>
....

<tr>
<td width="193"><font face="Verdana" size="2"><b>Companyname:<font color="#FF0000">*</font></b></font></td>
<td colspan="2"><input type="text" name="T1" size="50" tabindex="1" value="<?php echo $CompanyName ; ?>" ></td>
</tr>

Data management – validate/update

$CompanyName = $_POST[‘CompanyName '];
.....

// Validate...

if(empty( $CompanyName ) ) {
$error1 = '<br> Companyname is empty ';
}

....

if (preg_match("/^([w|.|-|_]+)@([w||-|_]+).([w|.|-|_]+)$/i", $email-address)) {

} else {
$error4 = "<br> Email is not correctt!";
}

....
Echo $error1 . $error4;
.....

mysql_query("UPDATE Customer SET CompanyName = '$CompanyName '..... Where....

File management

• File management on server.
<table border="0" width="50%" cellspacing="10" cellpadding="20">
<?php
$path = « foldername";
// Open the folder
$dir_handle = @opendir($path) or die("Unable to open $path");
// Loop through the files
while ($file = readdir($dir_handle)) {
if($file == "." || $file == ".." || substr($file, 0, 10) != 'Nyhedsbrev') continue;
$aar = substr($file, 11, 4);
$month_number = substr($file, 16, 2);
$month_name = date( 'F', mktime(0, 0, 0, $month_number) );
echo "<tr><td width='32' align='left' valign='top'><font face='Verdana' size='2'>";
echo "<font face='Verdana' size='2'>" . $aar . "</td><td><font face='Verdana' size='2'>" . $month_name . "</td><td>";
echo "<font face='Verdana' size='2'><a href='/ foldername /$file'>$file</a></td></tr>";
}
// Close
closedir($dir_handle);
?>
</table>

PDF creation

• PHP plugin.
<?php
require('fpdf.php');
http://www.fpdf.org
// Get some data – to use..
$resultat1 = mysql_query("SELECT * from meetings where active=‘NEXT'") or die(mysql_error());
while ($row = mysql_fetch_array($resultat1)) {
$firma[$p] = substr($row['CompanyName'], 0, 44);

$pdf->AddPage(P,A4);

// Create some frame – including some text
$pdf->SetFont('Arial','B', ‘$CompanyName’);
$pdf->SetTextColor(0,0,0);
$pdf->SetXY(10,10);
$pdf->SetDrawColor(240,240,240);
$pdf->Cell(90,54,"$pnavn[$a]",1,1,C);

PayPal

• Free to have - not free to use.
• You need an account.
Hidden API buildup.
https://cms.paypal.com/us/cgi-bin/?cmd=_render-
• content&content_ID=developer/howto_html_landing

• Create buttons – onsite/offsite.
• Mostly European creditcards.
• Transaction-information related to e.g. invoice
number.
• PayPal – developer site. (https://www.x.com/developers/paypal)

PayPal – standard call

<form action="https://www.paypal.com/cgi-bin/webscr" method="post">
<input type="hidden" name="cmd" value="_s-xclick">
<input type="hidden" name="hosted_button_id" value="FLFFSFSFSDFL">
<input type="hidden" name="on0" value="Faktura:

<table>
<tr><td nowrap="nowrap">
<font face="Verdana" size="2">Invoice number</font>
<font face="Verdana" size="1"> (Price 5000€.)</font></td></tr><tr><td><input type="text" name="os0" maxlength="200" value="
<?php
echo $workfaknr;
?>
" disabled></td></tr>
<tr><td> </td></tr>
</table>
<input type="image" src="https://www.paypalobjects.com/en_US/i/btn/btn_paynowCC_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way
to pay online!">
<img alt="" border="0" src="https://www.paypalobjects.com/da_DK/i/scr/pixel.gif" width="1" height="1">
</form>

PayPal – build up

<form action="https://www.paypal.com/cgi-bin/webscr" method="post">
<input type="hidden" name="cmd" value="_xclick">
<input type="hidden" name="business" value="PAYPAL ACCOUNT NAME">
<input type="hidden" name="item_name" value=« Invoice total">
<table>
<tr><td><input type="hidden" name="on0" value="Faktura"><font face="Verdana" size="2">Pick Invoice</font></td></tr><tr><td><select name="os0">
<?php
while ($row = mysql_fetch_array($result1))
{ ... Get invoices... }
<tr><td> </td></tr>
</table>
<?php
Echo "<option value='" . $worknr . "'>" . $worknr . ": " . money_format('%.2n', $Total) . "</option>";
$harray[$worki] = "<input type='hidden' name='option_select" . $worki . "' value='" . $worknr . "'><input type='hidden' name='option_amount" . $worki . "'
value='" . sprintf("%01.2f", $Ptotal) . "'>";
$worki++;
}
?>
<input type="hidden" name="option_index" value="0">
<input type="image" src="https://www.paypalobjects.com/en_US/i/btn/btn_paynowCC_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way
to pay online!">
<img alt="" border="0" src="https://www.paypalobjects.com/da_DK/i/scr/pixel.gif" width="1" height="1"></p>
</form>

SMS API

• External function to call.
• You may see different setup.
• Parameter call – cross site
• API object creation.
• Call back – with delayed information.

• Other functions as API – e.g. Google.

SMS API

$smsnumber = $wmobil[$i];
$bruger = $_SESSION['navn'];
$nu = date("YmdHis");
$work = $i;

$smsid = $bruger . $nu . $work;

// Build Parameters (RETRY=TRUE som default)
$strParameters =
"?username=USERNAME!!!!" .
"&password=CODE!!!" .
"&dialcode=45" .
"&recipient=$smsnumber" .
"&text=" . urlencode(utf8_encode("$sms-text")) .
"&from=Common+CZ" .
"&callback_url=" . urlencode("http://www.gs-gruppen.org/GS-SMSs.php?smsid=$smsid&password=RETURNPASSWORD");

//Echo $strParameters;

//Send sms and save output in $strOutput
$strOutput = file_get_contents("http://api.textreactor.com/legacy/sms.php" . $strParameters);

Thank you for your attention!
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Practical PHP by example Jan Leth-Kjaer

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