PHP - Php Interger Overflow Handling Help

This doesn't work. Based off what I have seen online, it is suppose to.

Basically, this is what I tried, and the quote is what was returned. I have no idea how to get this to work. It should have been pretty standard
based off of the PHP documentation. The Xpath idea I got from someone else. Either way if I try to use find element by id or tag name it still
returns an empty array, no matter what.

Any advice on what I am doing wrong is appreciated. It doesn't matter what URL I try, none of them seem to work.
Code: [Select]
<?php
$school_data = file_get_contents('http://www.infotechnologist.biz');
$doc = new DOMDocument();
$doc->validateOnParse = true;
$doc->loadHTML($school_data);
$xpath = new DOMXPath($doc);
$tags = $xpath->query('div');
echo '<pre>';
print_r($tags);
echo '</pre>';
?>
Quote

DOMNodeList Object
(
)

I am inserting last names into the database using mysql_real_escape_string(), and outputting the data into a textbox using addslashes().

When I try to display O'Brian "O\" is displayed in the text box.

The name is saved corretly as O'Brian in the database.

I am printing the string like this:

Code: [Select]
echo "<input type='text' value='" . addslashes($customer['lName']) . "' blah blah...";

anybody have any ideas?

Whats the best way to handle database errors.

I been using ob_start() stuff to run the code and if a database connection error occurs an variable $error turns to 1 and it displays the error code instead of the normal page that should be displayed when no errors occur.

It works but I want to know if there is any better way to manage a db connection error while running a script.

Also, how do you manage a problem when like 3 queries are ran to setup a new user account and the last one fails because the db connection drops or something, how would you go about handling a 2/3 query successful?

I'm really stuck on how to manage errors if a db connection fails after the first connection is successful.

I'm trying to develop a website file manager. I want to allow SSI, and would like to handle it specifically..

Code: [Select]
$regexp = "<!--#include\s[^>]*virtual=(\"??)([^\" >]*?)\\1[^>]*\/-->";
if(preg_match_all("/$regexp/siU", $body, $matches, PREG_SET_ORDER)) {
 foreach($matches as $match) {
 $includeFile = $match[2];
} }

This snippet shows how you would get the included file path in the SSI code of the website body [ the $body tag ], but I don't need to just find it- I want to replace the SSI code with a simpler code in the HTML that appears in the editor for easy management.. Then switch back from my easier code to the actual SSI code..

Example:

Replace
Code: [Select]
<!--#include virtual="/newsManager/output.php"-->
With
Code: [Select]
{INCLUDE=/newsManager/output.php}
THEN when the user saves the page,

Replace
Code: [Select]
{INCLUDE=/newsManager/output.php}
With
Code: [Select]
<!--#include virtual="/newsManager/output.php"-->

Is there an easy fix or should I just switch to a full blown template engine.. even though this is the only required feature?

Hi ..am new to PHP and am using it to solve some mathematical problems which require extensive computation.

Following is a code to solve a problem:
Code: [Select]
<?php

$num =1;
$n =0;
$temp = 0;
$count =0;
$Final =0;

While( $num < [color=orange]1000000)[/color]
{
   $n = $num;
       while($n >1)
         {

            if(( $n % 2) == 0)
              {
                $n = $n/2;
                $temp++;
              }
             
             else
              {
                $n =3*$n +1;
                $temp++;
              }
           }

     If($temp > $count)
          {
            $count =$temp;
            $Final =$num;
          }


      $num++;
      $temp =0;
}

  echo $Final;
  echo "<BR>";
  echo $count;

?>      
I am running into "Maximum execution time of 30 seconds exceeded" error...its happening coz of the number 1 million...the code wrks fine for 100,1000,10000 and 100000...but breaks down @ 1000000.....is there any way to solve this situation...or PHP is not capable of handling huge numbers?

please help...am stuck with this even though am so close to solving the prob.

Thanks
Abhijeet

A form needs to get answers of math quiz, returning numbers, up to 2 digits after the point.
In all form examples I noticed the usage of:  Code: [Select]
...<input type="text" name="name" /...
Cant it be a number? floating or integer? why "text" ?

Also, can I limit the form to accept numerical input only or would I need to learn Ajax for that?

Once I have the answer, I need to compare it to the correct answer. The method I have in mind is to multiply the answer and the correct one by 100 and compare the integer part. Is there a pre-made function that can do the same?

Hello there,
I'm having a problem displaying money correctly with php. I have a field called "balance" with the type float(10,2), in this field I have a number store as "34.55" which I can go in and look at within phpmyadmin but when I echo this value on the front-end of the site it is displayed as "34.549999237061"
Can someone please help?
Regards.

Hello,
Am writing a script that involves user input.
Take an example: a user fills in a wrong username or password at the page login.php, my login processor (processor.php) detects it, how is the error "WRONG USERNAME OR PASSWORD" supposed to be transferred back to login.php.
So far I have been using a session variable to transfer the error but am sure there is a better way to do this without displaying the error on processor.php itself.

Thanx in advance

Hi
I'm completely new to error handling in PHP and wanted to ask whether I'm doing it right and, if not, what the right way would look like

class DBConnection {

public function execute($sql) {

$query = @pg_query($this->dbconn, $this->prepare($sql));

try {

if (!$query) {

throw new DBException();

}

} catch (DBException $e) {

echo "Query execution failed";

exit;

}

}
}

I have set an SQL field as unique so that duplicates can't be entered, however rather then having the page error out and show the Error: Duplicate entry 'entry' for key 'field' I would like to be able to have a little div appear and say something like "this entry already exists" I already have it set to show that the item has been added but I have no idea were to start to make this work.

Any ideas?

Thanks,
Jim

Hi,

I have an HTML form created using Dreamweaver and now I need a script to handle the form processing. Basically what I need is for the form data received from the webpage to be organized in an email and then sent to me. I would also like to display a thank you message in the browser so the user knows it was received. I was planning to do this using CGI but a colleague suggested that CGI is old school and nowadays a developer would use PHP for this task. Is PHP the right solution for this project?

The examples I have found so far always include the HTML for the form and the script needed to handle it in one file. In my case, I have an HTML form already in place and need it to work with a script to perform the email function. I know I need to set "Action=" on my webpage to point to the PHP script but what would the code look like if no HTML is needed? I hope this makes sense...

Thanks for your help!
Rob

Hi Guys,

Can someone please tell me why no echo statements work after my heredoc :?

Here's the code:

Code: [Select]
<?php

switch($_POST['options']){

case '1':
$selected1 = 'selected';
break;
case '2':
$selected2 = 'selected';
break;
case '3':
$selected3 = 'selected';
break;
case '4':
$selected4 = 'selected';
break;
default:
$selected1 = $selected2 = $selected3 = $selected4 = '';
}

echo <<<END
<html>
<head>
<script type="text/javascript">
function show_alert()
{
alert("I am an alert box!");
}

function formSubmit()
{
document.getElementById("frm1").submit();
}


</script>
</head>
<body>
<form id="frm1" method="post" action="search.php" />
<select onclick="formSubmit()" name="options" size="1">
<option $selected1 value="1">date</option>
<option $selected2 value="2">year</option>
<option $selected3 value="3">country</option>
<option $selected4 value="4">language</option>
</ select>
</body>
</html>
</form>
END;

if(isset($_POST['options'])){
echo "item chosen";
}
It works when I put the 'isset' if clause before the heredoc and even weirder, if i add a submit input type in the form as the last field it works as is? ex:

Code: [Select]
<?php

switch($_POST['options']){

case '1':
$selected1 = 'selected';
break;
case '2':
$selected2 = 'selected';
break;
case '3':
$selected3 = 'selected';
break;
case '4':
$selected4 = 'selected';
break;
default:
$selected1 = $selected2 = $selected3 = $selected4 = '';
}

echo <<<END
<html>
<head>
<script type="text/javascript">
function show_alert()
{
alert("I am an alert box!");
}

function formSubmit()
{
document.getElementById("frm1").submit();
}


</script>
</head>
<body>
<form id="frm1" method="post" action="search.php" />
<select onclick="formSubmit()" name="options" size="1">
<option $selected1 value="1">date</option>
<option $selected2 value="2">year</option>
<option $selected3 value="3">country</option>
<option $selected4 value="4">language</option>
<input type="submit">
</ select>
</body>
</html>
</form>
END;

if(isset($_POST['options'])){
echo "item chosen";
}
Any help would be greatly appreciated!

Cheers

D

I am uncertain of how to go about checking if my variables have values, and if I have to do this at every step in my code?!   

For instance...

In my "Member" table, the fields "id" and "name" are required.  So when I run this query, presumably there are always values there, right?

Code: [Select]
// Build query.
$q = 'SELECT id, first_name
FROM member
WHERE email=? AND pass=?';

1.) Is that a fair assumption?


After the above code, I initialize these two variables...

Code: [Select]
// Initialize variables.
$memberID = $memberFirstName = '';

Next I have...
Code: [Select]
// Bind result-set to variables.
mysqli_stmt_bind_result($stmt, $memberID, $memberFirstName);

2.) Did I need to initialize those two variables if I am assigning them values a few lines down?

3.) Can I assume that "$memberID" and "$memberFirstName" will have values based on the comments above?


Then a few more lines after this, I have...
Code: [Select]
// Set Session variables.
$_SESSION['memberID'] = $memberID;
$_SESSION['memberFirstName'] = $memberFirstName;
$_SESSION['loggedIn'] = TRUE;

4.) Again, do I need to keep checking for values (e.g. using ISSET)??

I suppose *anything* is possible, but you could also make your code so full of error-checking code that it would come to a screeching halt?!

Please enlighten me!!


Debbie

Hello everyone, I've recently asked a question about forms and Requinix mentioned PRG method of processing forms. The PRG idea solves my refresh and back button document expired problems but i notice something new: when i refresh a page or use the browser back button - then return to the PRG process - repeat a refresh or back button action - i notice that i can traverse the cache history as many times as my prg approach redirects me. I feel like i am not implementing this PRG method correctly, or is this correct?

Here is the form process if it helps solve the problem:

i have a login form which contains a CSRF token. when i submit the form i specify an action as /prg/ which submits the data to index.php in the prg folder. After processing the data, prg index.php redirects to the root (because you are logged in). One problem is that i have a logo on the login page that allows you to return to the root (localhost index page). When the form is not submitted or it contaiuns incorrect login data or the logo is clicked to return to homepage, then the history seems to repeat itself. I've read that people recommend to use a header 303 See Other but the result is the same. Basiclly, if i am implementing a prg correctly, then the question becomes how can i instruct a browser to ignore the redirect as if the cache contains only the index page?

i cannot find prg examples that involve a csrf token and other links on the protected page (prg/index.php protected because you need a form submission with a csrf token and it only processes data then redirects.) I don't see this happening in professional sites like Google or Microsoft etc. what am i doing wrong?

Not sure why the PHP variables in the code below aren't interpreting the values that they should be receiving from the HTML form.

HTML form
Code: [Select]
<form action="handle_form.php" method="post">

<fieldset><legend>Enter your information in the form below</legend>

<p><b>Name:</b> <input type="text" name="name" size="20" maxlength="40" /></p>
<p><b>Email Address:</b> <input type="text" name="email" size="40" maxlength="60" /></p>
<p><b>Gender:</b> <input type="radio" name="gender" value="M" /> Male <input type="radio" name="gender" value="F" /> Female</p>

<p><b>Age:</b>

<select name="age">
<option value="0-29">Under 30</option>
    <option value="30-60">Between 30 and 60</option>
    <option value="60+">Over 60</option>
</select>
</p>

<p><b>Comments:</b> <textarea name="comments" rows="3" cols="40"></textarea></p>
</fieldset>

<div align="center"><input type="submit" name="submit" value="Sumbit My Information"  /></div>
</form>
PHP handle_form
<?php #Script 2.2 handle_form.php

$name = $_REQUEST['name'];
$email = $_REQUEST['email'];
$comments = $_REQUEST['comments'];

echo "<p>Thank you, <b>$name</b>,
for the following comments:<br />
<tt>$comments</tt></p>
<p> We will reply to you at <i>$email</i>.</p>";

?>