PHP - Error Handling In Php. How To Do It?

Hello everyone,

quick description of 'error handling' so that everyone understands the solution i am seeking. let php and the database handle the error is not an appropriate answer here.

find out what i mean: using xampp, go to a login screen of your website, then turn off the database before submitting the login data. the connection will be attempted then fail. the browser will display its own error page which is white bg with a message. this is ridiculous. i made a custom handler that allows me to ignore this failure and show my own website with an error message.

now how can i detect an error with a select or update statement? i am not a db designer, so i really don't know how to do it. what say i fetch filed['testmyerror'] and it doesn't exist or there is a problem. how do i write php code that is used to ignore this problem and display my own message. naturally i will log the error and/or log and send email to myself.

anyone able to help? just a tip in the right direction?

Thank you very much, i appreciate this forum and its members always.

Hi.

I'm trying to display all the missing fields (errors) when the user hits SUBMIT.

My logic:

IF there is NO EMAIL THAN add $errortrack array = $errormsg[EMAIL]

IF there is NO OLDPASSWORD THAN add $errortrack array = $errormsg[OLDPASS]

and so on.

At the end, Print ALL the Error messages on the form using <?php foreach ( $errortrack as $key => $value) { 
                echo "<dt>$key:</dt>"; } ?>

The only thing it prints out is "0:" ever though there should be other errors.

What am I missing? 

Site Link http://www.fusionfashionhair.com/newpassform.php
My PHP Code:

<?php
session_start();
?>
<?php
$submit = $_POST['submit'];
// Form Data
$email = $_POST['email'];
$password_old = $_POST['password_old'];
$password_new = $_POST['password_new'];
$password_new_con = $_POST['password_new_con'];
$errorcount = 0;

$errormsg['Email'] = "Email Entered is Invalid";
$errormsg['OldPass'] = "Old Password Entered is Incorrect";
$errormsg['NewPass'] = "New Password Entered is Incorrect";
$errormsg['NewPassCon'] = "New Confirmed Password Entered is Incorrect";
$errormsg['SecCode'] = "Security Code is Incorrect";
$errormsg['NoErr'] = "No Errors, Continue";

$errortrack = array ($errormsg['NoErr']);

if ($_POST[submit]){
    if ($errorstop = "go") {
    $errorstop="go";
    while ($errorstop<>"stop") {
        // check for existance
      if ($email) {
            echo "True - Continue 1";
            echo "<p>----------</p>";
        } else {
            $errortrack = array ($errormsg['Email']);
            $errorcount++;
            $errorstop="stop";
        }
            
        // check for existance
      if ($password_old) {
            echo "True - Continue 2";
            echo "<p>----------</p>";
        } else {
            $errortrack = array ($errormsg['OldPass']);
            $errorcount++;
            $errorstop="stop";
        }        

        // check for existance
      if ($password_new) {
            echo "True - Continue 3";
            echo "<p>----------</p>";
        } else {
            $errortrack = array ($errormsg['NewPass']);
            $errorcount++;
            $errorstop="stop";
        }        

        // check for existance
      if ($password_new_con) {
            echo "True - Continue 4";
            echo "<p>----------</p>";
        } else {
            $errortrack = array ($errormsg['NewPassCon']);
            $errorcount++;
            $errorstop="stop";
        }            
        $errortrack = array ($errormsg="EVERYTHING IS OK");
        $errorstop="stop";
    }//End While Loop

    } else {
        while($errorcount>=0) {
            // Test display all error messages
            echo "<p>----------</p>";
            echo "<p>Error Count = '$errorcount'</p>";


        }
        die ("PLEASE FILL IN ALL FIELDS");
        
    }
}
?>


My Form Code with the PRINT ERROR:
Code: [Select]
    <form action='newpassform.php' method='post' id="regform">
      <fieldset>
        <legend>Change Password</legend>
        <p><?php foreach ( $errortrack as $key => $value) { 
                echo "<dt>$key:</dt>"; } ?></p>
        <p>
          <label for='email'>Email:</label>
          <input name='email' type='text' maxlength="25" value='<?php echo $email; ?>'/>
        </p>
        <p>
          <label for='password_old'>Old Password:</label>
          <input name='password_old' type='password' maxlength="32" />
        </p>
        <p>
          <label for='password_new'>New Password:</label>
          <input name='password_new' type='password' maxlength="32"/>
        </p>
        <p>
          <label for='password_new_con'>Confirm Password:</label>
          <input name='password_new_con' type='password' maxlength="32"/>
        </p>
        <p><span class="required">*</span> Note, username and password are case sensitive</p>
        <p>Forgot your password? <a href="forgot_password.php">Click Here</a></p>
        <p>Login <a href="login.php">Here</a></p>
       <h2>Security Check</h2>
      <p>Enter letters below exactly how they are displayed.  Letter are case sensitive. </p>
      <br />
      <img src="captcha.class.php?usefile=1" />
      <!--OR-->
      <!--<img src="image.php" />-->
     
      <input id='user_code' name='user_code' type='text' size='10' >
      <p>&nbsp;</p>
        <input class="reset" type='reset' value='Cancel' name='reset'>
                <input class="submit" type='submit' value='Continue' name='submit'>
      </fieldset>
    </form>
    <!--End of Form-->

Hopefully there is a simple solution to this.

I have a form that when submitted sends a message to an email address from the form.  A customer fills it out, so there is no single one email address.  However, half of the time, the retards that use this form dont know their own email address and dont bother to put the .net at the end of it.  or they misspell it.  The other half of the time they dont even bother to put the @ and the domain.  They still think this is AOL for some god unknown reason.  And I cant account for all the ways that they can not figure out how to fuck up their email address, so an email-validator doesnt work because they can even beat that and still manage to break it.  For example, one guy named Mike continues to put the first half of his email in as Miek or Mik or just spelled completely wrong, and the 550 error that comes up when he puts that garbage in, which is most of the time (I think the guy is blind or something) is because his email address doesnt exist on the mail server because he cant spell it right, when on the off chance he actually does get the @domain.com in the end.  I really hate my retard customers.

So my simple little form blows up on them.

But what I am trying to do is to have something like this

if(@mail(args))
  {
  //success, I'll call them back shortly
  }
else
  {
  //youre a retard, please put in your email address correctly
  }

However, the error handling isnt working.  mail() is supposed to return FALSE if it encounters an error, an error that I'd rather put in an error log and not display to the customer, however, the error suppressor doesnt work.

Any Suggestions?

Hello,

If I have an index file with:

date_default_timezone_set('GMT');
error_reporting(E_ALL | E_STRICT); 

abstract class A {
    abstract public static function YesIReallyMeanAbstractStatic();
}

class B extends A {
    public static function YesIReallyMeanAbstractStatic() {
    }
}


This will not error.

However if I have:


date_default_timezone_set('GMT');
error_reporting(E_ALL | E_STRICT); 

require('class_a_in_a_different_file.php'); // Or use __autoload() to do the same.

class B extends A {
    public static function YesIReallyMeanAbstractStatic() {
    }
}


This will throw the error:
"Static function A::YesIReallyMeanAbstractStatic() should not be abstract"

I know abstract statics are debatable...
but it makes no sense to me for it to be allowed in the first example but disallowed in other.

So I was wondering if this is a bug? Or is there something else going on here?

I assume the parser is evaluating the included file and then throwing the error which doesn't happen if both classes are in the same file as they can then be evaluated altogether.

Hey guys i was wondering if someone could help or guide me. I have been messing around with php for quite some months now to the stage where i can code pretty much what i need to. but recently i started using paypals IPN and during testing i realised some problems arise for example when testing and people buying things say the payment failed due to a line not executing in your script for what ever reason, the person has lost their money yet you have gained it and they are lost. Take this code below for example:


public function insertIntoDatabase($firstName,$lastName,$emailAddress,$merchant,$code,$database,$gameNumber)
{
$year = date("Y");
// Check what database we need to submit too::
$sql = "INSERT INTO playerGame (playerFirstName,
playerLastName,
playerEmailAddress,
playerAccountType,
playerCode,
playerGameDate,
playerGameNumber) VALUES (?,?,?,?,?,?,?)";

$stmt = $this->conn->prepare($sql);
$stmt->bind_param('ssssssi',$firstName,$lastName,$emailAddress,$merchant,$code,$year,$gameNumber);
$stmt->execute();
$stmt->close();

return true;
}


this is called on success the paypal IPN script. But what happens if this fails to execute? I suppose i could wrap it in a variable on the other side and test it

if($task)
{
    echo "code executed";
}

but what happens if this fails ? of am i just being paranoid ? hope someone can help dont want to be ripping people off =] Thanks!

Has anyone seen a decent database class for nicely wrapping up all the PDO functions? Ideally I'm after an example to handle database errors properly, insert/update/select queries, prepared statements and transactions. I've had a crack at writing my own and it's a bit messy with error handling everywhere. Maybe I need to put that in a separate class or something.

E.g. here's how I'd do a database update:
$db = new Database();    // In page controller
$params['type'] = $type;
$params['details'] = $details;
$query = 'insert into site_logs (type, details) values (:type, :details)';
$result = $db->preparedUpdate($query, $params);   // returns false if error or # of rows if successful

Just some examples would be great and I'll re-factor my one to make it better. Thanks!

Hi guys, I'm reviewing a piece of small web application and the current application does not have any error / exception handling capability. If there is any error, it would simply show an error message followed by die;.

I'm planning to implement a simple exception handling class to handle the errors. What I'm thinking is a simple redirect when an error is being caught together with an error code that correspond to an error message in a simple flat text file. The error page will then show an error message that corresponds to the code.

Here's what I have so far. Would appreciate if the PHP experts here would give simple pointers to enhance it.

<?php
class MyException extends Exception {}

try {
throw new MyException("error.php");
}

catch (MyException $e) {
$file = $e->getMessage();
header("Location: $file?e=1");
}

?>

This is what I have on my error.php page

<?php
$errorcode = $_GET['e'];

function getErrorMessage($errorcode) {
$errors = file("english.txt");
foreach ($errors as $error) {
list ($key,$value) = explode(",",$error,2);
$errorArray[$key] = $value;
}
return $errorArray[$errorcode];
}
echo "Test <br />";
echo getMessageMap($errorcode);
?>

As you can see here, exception class would redirect user to error.php if an error is caught together with a GET variable on the URL. On error.php page, it would GET the error code and then run it through a function to get the error message of the corresponding error code and then echos it out.

Was wondering if this is a good practice? My ultimate goal here is to avoid displaying the error message itself on private includes file.

Thank you in advance for your suggestions.

This topic has been moved to PHP Applications.

http://www.phpfreaks.com/forums/index.php?topic=351056.0

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,

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

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.

Hey Guys, Been coding PHP for a while but I always wonder about the right way of doing things. I am building an online community which I want to display to members and non-members. With this each screen will have options that are available for members only. I have set up session variables once a user logged in but its getting really old having to nest if statements on ISSET then again to check the values in the variables if it is set. See example below.   Question 1. Is it ok to session_start(); for all site visitors? Question 2. If Q.1 is ok then is it ok to set all the session variables upfront with blank values as placeholders. This would eliminate the need for ISSET.

if (ISSET($_SESSION['On'])) {
	if (in_array($GroupID, $_SESSION['Groups'])) {
		$IsMember = 1;
		} 
	else {$IsMember = 0;}
	}
else {$IsMember = 0;}

Just wanted to get your  thoughts on this.   Thank you, Jeremy

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
(
)

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.

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?