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jscix

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Posts posted by jscix

    How far off am I? ::o

    in Regex Help

    Posted

    Okay, I just read a basic page on regex. I'm trying to come up with a regex expression for validating an url.

     

    /^http://[.*]\.[a-zA-Z0-9]\.[.{2}]|[.{3}]\/[.*]$/

    ^

    I think this says:

    Starting with http://

    Followed by any amount of any character .*

    Followed by a period \.

    Followed by any string (a-z A-Z and 0-9)

    Followed by a period \.

    Followed by any two characters .{2}

    OR

    Followed by any three characters .{3}

    Followed by a /

    Ending with any amount of characters .*$

     

    (Sorry in advance for the questions, I figure i'll never understand this stuff If I just keep borrowing other peoples regex)

     

    I'm just curious how close I was with that? Also im curious about a few things..

     

    1. When do you use brackets? And why? [ ]

    2. When do you use Parentheses? And why? ( )

    3. What should my regex have looked like, for validating an url?

     

     

    I hate math, Anyone?

    in PHP Coding Help

    Posted

    If anyone is interested/cares I figured it out.

    (well, someone from www.physicsforums.com told me how to finish it.) ;o

     

    All I was missing was dividing the deviation by the total number of coin tosses. If anyone wants to check it out ,

    heres the code.

     

    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<head>
	<meta http-equiv="content-type" content="text/html;charset=utf-8" />
	<title>Coin Toss</title>
</head>
<html xmlns="http://www.w3.org/1999/xhtml">
<?php 
$submit = ($_POST['Toss']);
$values = ($_POST['select']);
if (!$submit) {
?>
<body><center>
	<p align="center">Coin Toss Deviation
	<form method="post" action="cointoss.php">
	        <select name="select">
	        <option value="none">How many coin tosses?</option>
			<option value="one">One Hundred</option>
			<option value="two">One Thousand</option>
			<option value="three">One-Hundred Thousand</option>
		</select><input type="submit" name="Toss" value="Toss" />
	</form>
</center></body></p>

</html>
<?php
}
else {

switch ($values) {

case "none":
die ("Select number of tosses");
break;
case "one":
$total = "100";
break;
case "two":
$total = "1000";
break;
case "three":
$total = "100000";
break;
}
$dev = 0;
$i = 0;

while ($i < $total) {

$cur = mt_rand(1,2);

if ($cur == "1") {
$dev++;
$one++;
}

if ($cur == "2") {
$dev--;
$two++;
}
$i++;
}
$st = ($dev / $total);

print "<center>ones: $one <br>twos: $two<br><br>";
print "<b>total: "  . $st . " point deviation.</b><br><br>";
print <<< DUH
Average deviation should be 0 points<br>
The more tosses, the lower the deviation should be. (Closer to 0)<br>
DUH;
print "<a href=\"cointoss.php\">Try Again!</a>";
}
?>

    I hate math, Anyone?

    in PHP Coding Help

    Posted

    Okay, What im trying to do is create a create a random number generator, that outputs 1 and 2 (coin toss)

     

    From what I understand, the more coin tosses (the more times I generate a random 1 or 2) the more uniform the pattern should be.

     

    EG: After generating a random 1-2 sequence, 1,000,000 times.. i should have 500,000 (1s) and 500,000 (2s).. am I wrong?

     

    Anyway, I'm not sure what Im doing wrong but the more numbers I generate, the more deviation Im getting.

     

    Here is how i'm doing this.. (I know I probably did this all wrong.. if so someone just tell me lols) :D

     

    ty in advance

     

     

    


<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<head>
	<meta http-equiv="content-type" content="text/html;charset=utf-8" />
	<title>Coin Toss</title>
</head>
<html xmlns="http://www.w3.org/1999/xhtml">
<?php 
$submit = ($_POST['Toss']);
$values = ($_POST['select']);
if (!$submit) {
?>
<body><center>
	<p align="center">Coin Toss Deviation
	<form method="post" action="Cointoss.php">
	        <select name="select">
	        <option value="none">How many coin tosses?</option>
			<option value="one">One Hundred</option>
			<option value="two">One Thousand</option>
			<option value="three">One-Hundred Thousand</option>
		</select><input type="submit" name="Toss" value="Toss" />
	</form>
</center></body></p>

</html>
<?php
}
else {

switch ($values) {

case "none":
die ("Select number of tosses");
break;
case "one":
$total = "100";
break;
case "two":
$total = "1000";
break;
case "three":
$total = "100000";
break;
}
$dev = 0;
$i = 0;

while ($i < $total) {

$cur = mt_rand(1,2);
//print $i . " = $cur <br>";

if ($cur == "1") {
$dev++;
$one++;
}

if ($cur == "2") {
$dev--;
$two++;
}
$i++;
}
unset ($submit);
print "<center>ones: $one <br>twos: $two<br>";
print "total: "  . $dev . " point deviation.<br><br>";

print <<< DUH
Average deviation is 0 points<br>
The more tosses, the lower the deviation should be. (Closer to 0)<br>
DUH;

print "<a href=\"Cointoss.php\">Try Again!</a>";
}
?>

    need help with 'include' function

    in PHP Coding Help

    Posted

    Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /home/www/narutoking.com/index.php:3) in /home/www/narutoking.com/common.php on line 3

     

    Means, the file your trying to include, is trying to start a session "Session_Start()", after the page/script your including it in, has already sent data to the page, session_start() has to be the first thing on the page.

     

    so, your best bet is to add in a <?php session_start(); ?> to the top of index.php

    Login Problem

    in PHP Coding Help

    Posted

    lol, wow I didnt catch that at all,  ???

     

    $query="INSERT INTO seebergerLogin (username, password, first_name, last_name)VALUES      ('$_POST[email_address]','$_POST[password]','$_POST[first_name]','$_POST[last_name]')";

     

    $query is a bad var name for a mysql_query, it looks far too similar

    Login Problem

    in PHP Coding Help

    Posted

    I honestly cant see the problem, your sql looks fine, as does the rest of your code.. but im curious why you are working with dirty $_POST Variables, after you have already placed and secured them(Assuming the CLEAN function does this) right here:

     

    $fname = clean($_POST['first_name']);

    $lname = clean($_POST['last_name']);

    $email = clean($_POST['email_address']);

    $pw = clean($_POST['password']);

     

    ?

    MP3 Upload, Security and Validation.

    in PHP Coding Help

    Posted

    yeah, i've created a function to validate the extention,

     

    Function ValidateFileXT($string) {

$trimstr = substr($string, -4); 
$xt = strstr($trimstr, '.');

if (!$xt){
return False;
}
else {
return $xt;
}
}

     

    eg:

    $file = strtolower(basename($_FILES['uploadedfile']['name']));

    if (ValidateFileXT($file) == ".mp3") {

    //yay

    }

     

    but I was thinking more in terms of actual validation, I think I remember reading that the GD lib. Has a function: exif_imagetype()

     

    "exif_imagetype() reads the first bytes of an image and checks its signature."

     

    How difficult would this be to do with an mp3?

     

     

    MP3 Upload, Security and Validation.

    in PHP Coding Help

    Posted

    Okay, This is the first time I've attempted creating anything beyond a simple image upload.

    I would appreciate any helpful tips for ways to maximize validation for mp3 files.

     

    Beyond using,

     

    $_FILES["uploadedfile"]["type"]

     

    What ways can I make sure, the file is an valid mp3 file?

     

    Much appreciation in advance..

    Programming for a living.

    in Miscellaneous

    Posted

    I have been teaching myself PHP,SQL (along with dhtml,xml,css,javascript etc) and plan on going to school for either java, or c.

     

    I find programming/web design to be very fun/interesting, So I have some questions for anyone who does this stuff for a living,

     

    How difficult is it to make a decent salery freelancing?

     

    and what advice would you offer a novice interesting in persuring a freelance career in programming?

    [SOLVED] SQL Math ://

    in PHP Coding Help

    Posted

    Okay, I'm pretty sure im doing this correct, as it's updating the IP Address, but it isn't incrementing the  'total' feild, the number is staying the same.

     

    Anyone?

     

    mysql_query("UPDATE `attend` SET total=total+1, ip=$curIP WHERE attend.eid = $eventid");

    alter query - confused

    in PHP Coding Help

    Posted

    See if this query works,

     

    $change = mysql_query("ALTER TABLE `movies` CHANGE `directors` `directorrrsss` VARCHAR( 100 ) NOT NULL");

     

     

    If this doesnt work, I would just install phpMyAdmin ( Anytime you perform a command using their visual interface, it gives you the SQL Code, and has an option to output php formated code to use in your scripts )

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