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DB Update page was working and now appears blank but no idea why


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Anyone got any ideas why this just gives me a blank page?


Admittedly I took some of it from an example in a book, but the example worked and when I transfered the function to this is fails but I need to verify that they enter numbers ONLY - knowing the people involved on the client end they'll try it on...


It may not b the function at all.  I've checked all me syntax, semicolons, braketing, etc.  All looks fine.  All it needs to do is enter a typed in final count, a timestamp and change a status flag in a SQL Server database.  It did work fine,  but I don't know what stopped it working.


<!DOCTYPE HTML PUBLIC "-//W3C//Ddiv id=\"td\"  HTML 4.0 Transitional//EN">
<html xmlns="http://www.w3.org/1999/xhtml">
<meta content="MSHTML 6.00.2900.2180" name="GENERATOR">

    <head><link rel="stylesheet" href="http://mrserver/css/mr.css" type="text/css" media="screen">
<META HTTP-EQUIV="Refresh" Content="30;URL=http://mrserver/mr/mr_status.php">
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>Status v1 - End Job</title>

                    //Validate count to numbers only and max of 6 digits
                        function validateCount($count)

                            if (eregi($regexp,$count)) return 1;
                                else return 0;

                     //Check form has been submitted...

                        if (isset($_POST['submit']))
                               // printf("%s ok", $count);

                        //Split POSTed job data into component parts
                            $job_end = explode("+", $_REQUEST[change_status]);

		//UPDATES Start data after theyhave ended the job
			$con2 = mssql_connect('dbserver', 'UID', 'PWD');
			if (!$con2 || !mssql_select_db('DB', $con2))
			    die('**** Unable to connect or select database! ****');
		   	mssql_query("UPDATE JOB_MR 
                                             SET STATUS = '2', MR_END = GETDATE(), MR_COUNT = '$count'
                                             WHERE ID='$job_end[5]'",$con2)or die;
                                printf("%s invalid", $count);
<div style="font: 16px Verdana;" id="header">End Running Job</div><br>
        <form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="POST">
            <input type="text" id="count" name="count" maxlength="6">
            <input type="submit" name="submit" id="submit" value="Submit Final Count">


As a seperate question - what's the best IDE for PHP?  For the last 2 years I've used Notepad++ and I really like it, and am very comfortable with it but I've started using NetBeans and Eclipse - really so I don't get dependant on one system and also to see what else is available.  Sadly - it needs to be a freebe as the company won't buy anything like this.

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