Creating a News System with PHP - Part 2 - The Final Product (Page 5 of 5 ) That's it! Now we have edit and delete functionality to our little news system. I would like to remind everyone, however, that this is all meant to just be an exercise in PHP. There are many other concerns to worry about when making a real live news system such as concurrent use, other strange characters that can get in the mix, and millions of other things. You CAN use this for a live news system, but this should really be taken as a learning lesson. OK, on to the final code for our new administrative script. <?
if($action == "edit" && isset($HTTP_POST_VARS['password'])) {
//obviously you should change this password on the next line
if($HTTP_POST_VARS['password'] == "editpass") {
//First let's recompile that line with the pipe symbols so we can reinsert it
$line = $HTTP_POST_VARS['date'] . "|" . $HTTP_POST_VARS['name'];
$line .= "|" . $HTTP_POST_VARS['news'];
$line = str_replace("\r\n","<BR>",$line);
$line .= "\r\n";
$data = file('news.txt');
$data[$id] = $line;
//the next line makes sure the $data array starts at the beginning
reset($data);
//now we open the file with mode 'w' which truncates the file
$fp = fopen('news.txt','w');
foreach($data as $element) {
fwrite($fp, $element);
}
fclose($fp);
echo "Item Edited!<BR><BR>\n";
echo "<a href=\"$PHP_SELF\">Go Back</a>\n";
exit;
} else {
echo "Bad password!\n";
exit;
}
}
if($action == "edit") {
$data = file('news.txt');
$element = trim($data[$id]);
$pieces = explode("|", $element);
//the next line is to reverse the process of turning the end of lines into breaking returns
$news = str_replace("<BR>","\r\n",$pieces[2]);
echo "Make the changes you would like and press save.<BR>\n";
echo "<FORM ACTION=\"$PHP_SELF?action=edit\" METHOD=\"POST\" NAME=\"editform\">\n";
echo "Name:<BR>\n";
echo "<INPUT TYPE=\"text\" SIZE=\"30\" NAME=\"name\" value=\"".$pieces[1]."\"><BR>\n";
echo "The News:<BR>\n";
echo "<TEXTAREA NAME=\"news\" COLS=\"40\" ROWS=\"5\">".$news."</TEXTAREA><BR><BR>\n";
echo "Password:<BR>\n";
echo "<INPUT TYPE=\"password\" SIZE=\"30\" NAME=\"password\"><BR>\n";
echo "<INPUT TYPE=\"hidden\" NAME=\"date\" VALUE=\"".$pieces[0]."\">\n";
echo "<INPUT TYPE=\"hidden\" NAME=\"id\" VALUE=\"$id\">\n";
echo "<INPUT TYPE=\"submit\" NAME=\"submit\" VALUE=\"Save\"><BR>\n";
echo "</FORM>\n";
exit;
}
if($action == "delete" && isset($HTTP_POST_VARS['password'])) {
//obviously you should change this password on the next line
if($HTTP_POST_VARS['password'] == "deletepass") {
$data = file('news.txt');
//this next line will remove the single news item from the array
array_splice($data,$id,1);
//now we open the file with mode 'w' which truncates the file
$fp = fopen('news.txt','w');
foreach($data as $element) {
fwrite($fp, $element);
}
fclose($fp);
echo "Item deleted!<BR><BR>\n";
echo "<a href=\"$PHP_SELF\">Go Back</a>\n";
exit;
} else {
echo "Bad password!\n";
exit;
}
}
if($action == "delete") {
echo "<H2>You are about to delete the following news item.</H2>\n";
$data = file('news.txt');
$element = trim($data[$id]);
$pieces = explode("|", $element);
echo $pieces[2] . "<BR>" . "<b>Posted by " . $pieces[1] . " on " . $pieces[0] . "</b>\n";
echo "<BR><BR>\n";
echo "Are you sure you want to delete this news item? If so, enter the password and click on Delete.<BR>\n";
echo "<FORM ACTION=\"$PHP_SELF?action=delete\" METHOD=\"POST\" NAME=\"deleteform\">\n";
echo "Password:<BR>\n";
echo "<INPUT TYPE=\"password\" SIZE=\"30\" NAME=\"password\"><BR>\n";
echo "<INPUT TYPE=\"hidden\" NAME=\"id\" VALUE=\"$id\">\n";
echo "<INPUT TYPE=\"submit\" NAME=\"submit\" VALUE=\"Delete\"><BR>\n";
echo "</FORM>\n";
exit;
}
echo "<H1><u>Current News</u></H1>\n";
$data = file('news.txt');
//next line removed to make everything else easier in the admin script
//$data = array_reverse($data);
foreach($data as $key=>$element) {
$element = trim($element);
$pieces = explode("|", $element);
echo $pieces[2] . "<BR>" . "<b>Posted by " . $pieces[1] . " on " . $pieces[0] . "</b>\n";
echo "&nbsp;<a href=\"$PHP_SELF?action=delete&id=$key\">Delete</a>\n";
echo "&nbsp;<a href=\"$PHP_SELF?action=edit&id=$key\">Edit</a>\n";
echo "<BR><BR>\n";
}
echo "<HR>\n";
echo "<H1><u>Add News</u></H1>\n";
if($HTTP_POST_VARS['submit']) {
if($HTTP_POST_VARS['password'] == 'pass') {
if(!$HTTP_POST_VARS['name']) {
echo "You must enter a name";
exit;
}
if(!$HTTP_POST_VARS['news']) {
echo "You must enter some news";
exit;
}
if(strstr($HTTP_POST_VARS['name'],"|")) {
echo "Name cannot contain the pipe symbol - |";
exit;
}
if(strstr($HTTP_POST_VARS['news'],"|")) {
echo "News cannot contain the pipe symbol - |";
exit;
}
$fp = fopen('news.txt','a');
if(!$fp) {
echo "Error opening file!";
exit;
}
$line = date("m.d.y") . "|" . $HTTP_POST_VARS['name'];
$line .= "|" . $HTTP_POST_VARS['news'];
$line = str_replace("\r\n","<BR>",$line);
$line .= "\r\n";
fwrite($fp, $line);
if(!fclose($fp)) {
echo "Error closing file!";
exit;
}
echo "<b>News added!</b>\n";
} else {
echo "Bad Password";
}
}
?>
<FORM ACTION="<?=$PHP_SELF?>" METHOD="POST" NAME="newsentry">
Your name:<BR>
<INPUT TYPE="text" SIZE="30" NAME="name"><BR>
The News:<BR>
<TEXTAREA NAME="news" COLS="40" ROWS="5"></TEXTAREA><BR><BR>
News Password:<BR>
<INPUT TYPE="password" SIZE="30" NAME="password"><BR>
<INPUT TYPE="submit" NAME="submit" VALUE="Post it!"><BR>
</FORM> |
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