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Delete_page.php
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<!--Test Oracle file for UBC CPSC304 2018 Winter Term 1
Created by Jiemin Zhang
Modified by Simona Radu
Modified by Jessica Wong (2018-06-22)
This file shows the very basics of how to execute PHP commands
on Oracle.
Specifically, it will drop a table, create a table, insert values
update values, and then query for values
IF YOU HAVE A TABLE CALLED "demoTable" IT WILL BE DESTROYED
The script assumes you already have a server set up
All OCI commands are commands to the Oracle libraries
To get the file to work, you must place it somewhere where your
Apache server can run it, and you must rename it to have a ".php"
extension. You must also change the username and password on the
OCILogon below to be your ORACLE username and password -->
<html>
<html>
<body>
<h1 assign="center" style="color:blue;font-size:40px"> CPSC 304 PHP/Oracle Demonstration</h1>
</body>
</html>
<body>
<img src="war_image.jpg" alt="war image" width="500" height="600">
</body>
<head>
<title>CPSC 304 PHP/Oracle Demonstration</title>
</head>
<style>
body {
background-image: url(data:image/jpeg;base64,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);
background-size: cover;
}
</style>
<body>
<h2>Delete a value from Combatant table</h2>
<form method="POST" action="Delete_page.php">
<!--refresh page when submitted-->
<input type="hidden" id="requestDelete" name="requestDelete">
CID: <input type="text" name="deval0"> <br /><br />
<input type="submit" value="clickDelete" name="clickDelete"></p>
</form>
<h2>Result</h2>
<form method="POST" action="Delete_page.php">
<!--refresh page when submitted-->
<input type="submit" value="Display Result" name="display_result"></p>
</form>
<form method="POST" action="demo_page.php">
<!--refresh page when submitted-->
<input type="submit" value="BACK TO DEMO PAGE" name="DEMO_redirect"></p>
</form>
<hr />
<?php
//this tells the system that it's no longer just parsing html; it's now parsing PHP
$success = True; //keep track of errors so it redirects the page only if there are no errors
$db_conn = NULL; // edit the login credentials in connectToDB()
$show_debug_alert_messages = False; // set to True if you want alerts to show you which methods are being triggered (see how it is used in debugAlertMessage())
function debugAlertMessage($message)
{
global $show_debug_alert_messages;
if ($show_debug_alert_messages) {
echo "<script type='text/javascript'>alert('" . $message . "');</script>";
}
}
function executePlainSQL($cmdstr)
{ //takes a plain (no bound variables) SQL command and executes it
//echo "<br>running ".$cmdstr."<br>";
global $db_conn, $success;
$statement = OCIParse($db_conn, $cmdstr);
//There are a set of comments at the end of the file that describe some of the OCI specific functions and how they work
if (!$statement) {
echo "<br>Cannot parse the following command: " . $cmdstr . "<br>";
$e = OCI_Error($db_conn); // For OCIParse errors pass the connection handle
echo htmlentities($e['message']);
$success = False;
}
$r = OCIExecute($statement, OCI_DEFAULT);
if (!$r) {
echo "<br>Cannot execute the following command: " . $cmdstr . "<br>";
$e = oci_error($statement); // For OCIExecute errors pass the statementhandle
echo htmlentities($e['message']);
$success = False;
}
return $statement;
}
function executeBoundSQL($cmdstr, $list)
{
/* Sometimes the same statement will be executed several times with different values for the variables involved in the query.
In this case you don't need to create the statement several times. Bound variables cause a statement to only be
parsed once and you can reuse the statement. This is also very useful in protecting against SQL injection.
See the sample code below for how this function is used */
global $db_conn, $success;
$statement = OCIParse($db_conn, $cmdstr);
if (!$statement) {
echo "<br>Cannot parse the following command: " . $cmdstr . "<br>";
$e = OCI_Error($db_conn);
echo htmlentities($e['message']);
$success = False;
}
foreach ($list as $tuple) {
foreach ($tuple as $bind => $val) {
//echo $val;
//echo "<br>".$bind."<br>";
OCIBindByName($statement, $bind, $val);
unset($val); //make sure you do not remove this. Otherwise $val will remain in an array object wrapper which will not be recognized by Oracle as a proper datatype
}
$r = OCIExecute($statement, OCI_DEFAULT);
if (!$r) {
echo "<br>Cannot execute the following command: " . $cmdstr . "<br>";
$e = OCI_Error($statement); // For OCIExecute errors, pass the statementhandle
echo htmlentities($e['message']);
echo "<br>";
$success = False;
}
}
}
function printResultCombatant($result)
{ //prints results from a select statement
echo "<br>Retrieved data from table Combatant:<br>";
echo "<table>";
echo "<tr><th>CID</th><th>Combatant_name</th><th>HealthStatus</th><th>Hometown</th><th>Height</th><th>Combatant_weight</th><th>Age</th><th>Service_year</th><th>MUID</th></tr>";
while ($row = OCI_Fetch_Array($result, OCI_BOTH)) {
echo "<tr><td>" . $row[0] . "</td><td>" . $row[1] . "</td><td>" . $row[2] . "</td><td>" . $row[3] . "</td><td>" . $row[4]
. "</td><td>" . $row[5] . "</td><td>" . $row[6] . "</td><td>" . $row[7] . "</td><td>" . $row[8] . "</td><td>"; //or just use "echo $row[0]"
// echo $row[0];
}
echo "</table>";
}
function connectToDB()
{
global $db_conn;
// Your username is ora_(CWL_ID) and the password is a(student number). For example,
// ora_platypus is the username and a12345678 is the password.
// $db_conn = OCILogon("ora_liu650", "a46981452", "dbhost.students.cs.ubc.ca:1522/stu");
// $db_conn = OCILogon("ora_maxonzz", "a57800732", "dbhost.students.cs.ubc.ca:1522/stu");
$db_conn = OCILogon("ora_mhlchina", "a28325181", "dbhost.students.cs.ubc.ca:1522/stu");
if ($db_conn) {
debugAlertMessage("Database is Connected");
return true;
} else {
debugAlertMessage("Cannot connect to Database");
$e = OCI_Error(); // For OCILogon errors pass no handle
echo htmlentities($e['message']);
return false;
}
}
function disconnectFromDB()
{
global $db_conn;
debugAlertMessage("Disconnect from Database");
OCILogoff($db_conn);
}
function handleDelete()
{
global $db_conn;
executePlainSQL("DELETE FROM Combatant WHERE CID = {$_POST['deval0']}");
OCICommit($db_conn);
}
if (isset($_POST['clickDelete'])) {
if (connectToDB()) {
handleDelete();
disconnectFromDB();
}
} else if (isset($_POST['display_result'])) {
if (connectToDB()) {
$result = executePlainSQL("SELECT * FROM Combatant");
printResultCombatant($result);
disconnectFromDB();
}
} else if (isset($_POST['DEMO_redirect'])) {
header('Location: https://www.students.cs.ubc.ca/~maxonzz/military-system/demo_page.php');
exit;
}
?>
</body>
</html>