PHP - Limit User Input

Hello,

Firstly I am only just learning php so please bear with me.

What I want to be able to do is for a user to be able to enter a youtube url eg:
Code: [Select]
http://www.youtube.com/watch?v=8xz7ShMCWls
I want the scrip to take the video ID (after watch?v=) and append it into a html embed code for our forums that do not have the feature to auto embed a youtube vid.

Code: [Select]
<p> <img height="350" width="425" class="fw_media_youtube fw-parse" alt="YouTube-AFTER WATCH?V=CODE" src="http://thumbs.webs.com/Platform/mediaPreview.jsp?type=YouTube&amp;id=AFTER WATCH?V=CODE"/></p>
Where you see AFTER WATCH?V=CODE is where I want it to place the video id and then return this completed code for the user to copy and paste:

Code: [Select]
<p> <img height="350" width="425" class="fw_media_youtube fw-parse" alt="YouTube-8xz7ShMCWls" src="http://thumbs.webs.com/Platform/mediaPreview.jsp?type=YouTube&amp;id=8xz7ShMCWls"/></p>
How would I be able to get this done. I do not expect to be spoon fed but just a litlle help please.

Thank you so much if you do help.

Hi, what is they best way to validate user input of strings?

A couple of examples would be :

1> If i wanted to check for the existance on the coma ',' character in a string and replace it with a dash '-' character?

2> To check wether a user has entered a valid ip address in the form of x.x.x.x where x can range from 0-255?

I think i may need ereg/preg to do this but i have no idea about how to layout the syntax.

Thanks for looking.

I appreciate your help guys. I was able to do something to the code. Now it looks like this:


<?php
include "include/dbc.php";

include "include/header.inc";
?>

<script type="text/javascript">
<!--Hide Code
// Function Statements

//Function to confirm submit

function confirmSubmit() {
var submitform = window.confirm("Are you sure you want to submit the activities?");
if (submitform == true)
return validateForm();
return false;
}
// End Hide-->
</script>

<style type="text/css">
.mydate{
color:#00F;
text-decoration:underline;
cursor:pointer;
}
</style>

<script type="text/javascript">
function displayDate(d){
var date=new Date();
var D=date.getDate();
date.setDate(D+d);
var YYYY=date.getFullYear();
var MM=date.getMonth()+1;
MM<10?MM='0'+MM:null;
var DD=date.getDate();
DD<10?DD='0'+DD:null;
var span=document.getElementById('date');
span.innerHTML= 'Entries for '+MM+'/'+DD+'/'+YYYY;
}
onload=function(){displayDate(0)};
</script>

<h1>Food Diary</h1>

<div class="full">
<center><div><span class="mydate" onclick="displayDate(-1)"><img src="images/left_arrow.png" border="0">Yesterday</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span id="date" style="font-size:2em;"></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="mydate" onclick="displayDate(1)">Tomorrow<img src="images/right_arrow.png" border="0"></span></div><br />
<a href="#" onclick="displayDate(0);return false;">Today</a>
</center>

<div class="full">
<form name="exercise" id="exercise" method="GET" action="">
  <center><table>
<tr>
     <td><h3>Add an Activity</h3></td>
</tr>
<tr>
     <td><input name="NewSearchString" style="width: 100px" type="text"/>&nbsp;&nbsp;<input type="submit" value="Search" /> </td>
</tr>
    <tr>
     <td>
         <select name="activity">
             <option value="_">Activity Browse...</option>
                <option value="all">All Activities</option>
                <option value="biking">Biking</option>
                <option value="condition">Conditioning</option>
                <option value="dancing">Dancing</option>
                <option value="fish">Fishing & Hunting</option>
                <option value="Home">Home Activities</option>
                <option value="misc">Miscellaneous</option>
                <option value="music">Music Playing</option>
                <option value="occupation">Occupation</option>
                <option value="running">Running</option>
                <option value="sports">Sports</option>
                <option value="walking">Walking</option>
                <option value="water">Water Activities</option>
                <option value="winter">Winter Activities</option>
</select> &nbsp;&nbsp;<input type="submit" value="Submit" /></td></tr></table></center></form>
</td>
</tr>
</table> </center>
<table width="100%">
    <tr bgcolor="#66CC33">
     <td><div>Activity</div></td>
        <td><div>Specific Activity</div></td>
        <td><div>Time (hh:mm)</div></td>
        <td><div>Distance</div></td>
        <td><div>Units</div></td>
</tr>
    <tr bgcolor="#66CC33">
     <td><div></div></td>
      <td><div></div></td>
       <td><div></div></td>
        <td><div class="Float"></div></td>
        <td class="cp_Distance"><div></div></td>
</tr>
<?php
if(isset($_GET[activity])) {
$category=$_GET[activity];
$result = mysql_query("SELECT * FROM exercise WHERE type='$category'");
?>
<form action="add_activity.php" method="POST">
<?php
while($row = mysql_fetch_array($result)) {
echo '<tr><td><div>'.$row[Type].'</div></td>';
echo '<td><div>'.$row[Name].'<input type="hidden" name="exerciseid" value="'.$row[Name].'"></div></td>';
echo '<td><div><input type="text" name="duration['.$row['Name'].']"></div></td>';
echo '<td><div><input type="text" name="distance['.$row['Name'].']"></div></td>';
echo '<td><div><select>
         <option value="mile" name="mile">mile</option>
             <option value="Km" name="Km">km</option>
             <option value="M" name="M">m</option>
             <option value="Yard" name="yard">yrd</option>
             <option value="Feet" name="feet">ft</option>
            </select></div></td></tr>';

}
mysql_close();
?>
<tr><td colspan="6" align="center"><input type="submit" name="submit" value="Add Activities"></td></tr>
</form>
<?php
}
?>
    <tr bgcolor="#66CC33">
     <td><div></div></td>
      <td><div></div></td>
       <td><div></div></td>
        <td><div class="Float"></div></td>
        <td class="cp_Distance"><div></div></td>
</tr></table>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;


This somewhat works. The problem is that this code passes all the activities to the second page, where the output looks like this:


Array
(
    [exerciseid] => Hunting, general
    [duration] => Array
        (
            [Fishing from boat, sitting] => 20
            [Fishing from river bank, standing] => 
            [Fishing in stream, in waders] => 
            [Fishing, general] => 
            [Fishing, ice, sitting] => 
            [Hunting, general] => 
        )

    [distance] => Array
        (
            [Fishing from boat, sitting] => 25
            [Fishing from river bank, standing] => 
            [Fishing in stream, in waders] => 
            [Fishing, general] => 
            [Fishing, ice, sitting] => 
            [Hunting, general] => 
        )

    [submit] => Add Activities
)


Is there a way I can pass what the user input instead of passing everything (form validation maybe?)

Hi,
I'm using the form data type 'date', and trying to verify it. It seems a little too complicated to check that it's in the correct format (with "/" between day/month/year), unless I use regular expression, which I don't know much about and seems feels like there's an alternate solution or it's not necessary. Currently, the script accepts DD*MM*YYYY, where * is any character, since it just strips the 3rd and 6th character and checks the day/month/year using checkdate().
I'm not even sure if this is a problem. I am giving the user a "verify" page, where I could put it in the correct format (DD/MM/YYYY), but is that enough?
Feel like I'm missing something here, so any feedback would be great

I have a form a user may submit which has a text area.

If the user enters "Today
is
the
first
day
of

the

week"

it will be stored in the database like that (note the carriage returns etc).

If I then get that data from the table and echo it, it will print as 'Today is the first day of the week'.

How can I print it so that it will retain the user's input formatting/the formatting shown stored in the table?

Hi,

How do I generate a Google Map from user registration form?  For example, user enters username, password, and address.  I want to show the username, address + corresponding map on following confirmation page. 

I have already used static API to render the map as an image, but this is hard-coded.  I don't know how to pass the address into the address param. 

Any help would be much appreciated.  Thanks!

The code below is a function that checks to see if an email address exists in a database, if so it alerts the user. The db has one table and one field. It works fine when there is ONE record! However, if there are > 1 it doesn't work. How can I step through each record and compare it to what the user entered? Of course,  $_POST is the user's value and the db record is the $myAddy value.

<?php
function emailLookup()
{
include ('file:///Library/WebServer/Documents/re_connect_scripts/emailLookup.php');
while ($row = mysqli_fetch_array($result))
{
extract ($row);
$myAddy = $addy;
}
if ($_POST["add_email"] == $myAddy)
{
global $lookupError;
$lookupError = 'This email address is already on the list.';
global $counter;
$counter++;
}
else
{
return;
}
}
?>

I have a page that has roughly 100 text input fields.  Once the user is done, I need to put the data in my mysql db.  How do I get the data from the user input page to the php page that will process the data (e.g. process.php)?

I've done some searching and found a few possibilities use a ajax style call back to load a seperate asp page (e.g. createsession.asp) and that page set session variables that can then be read by process.php write everything to a cookie using some sort of a delimiter so that it can handle multiple variables (e.g. cookie data => var1/var2/var3/var4... write all the data to a text file and then have process.php load that file
Which should I pursue?  Is there a better option?

Ok so I got BB Code working. Now I want to prevent Users from inserting HTML into Posts. I have the following:


    $PostText = mysql_escape_string($_POST['replytext']);
    $Replace = Array ('/(<)(.+)(>)/','/(<\/)(.+)(>)/');
    $ReplaceWith = Array ('&LT;\\2&GT;','&LT;/\\2&GT;');
    $PostText = preg_replace($Replace, $ReplaceWith, $PostText);


Now If I were to input
Code: [Select]
<a href=http://phpfreaks.net>Php Freaks</a>Into a forum reply it would return:
Code: [Select]
<a href=http://phpfreaks.net>Php Freaks

When Checking the database it has:
Code: [Select]
&LT;a href=http://phpfreaks.net>Php Freaks</a&GT;

Any help on solving this?

Hello,

I'm creating an application where a user can input there own CSS. The problem I'm having is understanding if this will open security holes if...

1. Users input is saved to a file called style.css

2. Each user is on their own a sub-domain from my reseller hosting plan.

3. The style.css file will be included in the page code like so:
Code: [Select]
<link type='text/css' rel='stylesheet' href='style.css' />

Any advice?

I have a family site with a member list and a forum that both run on MySql.
One of the items in the member list is the birthday.

What I like to achieve is that a day or 2 before a member's birthday, a post wil be automaticly inserted in the forum, (a post that contains that this persons birthday is comming up in a few days) without any user input.
I like to have this done automaticly because I don't feel like setting up a cron job for every member seperatly. There are just too many members.
What I need is a script that will create a cron job or something simular the moment a new member registers and updates his profile and sets his birthday.

hello all, i have a php form with multiple submits (one calculates price, one checks date and one submits the form and the data to mysql database)
when i hit calculate price, for example, the function works fine but all the fields are cleared and i would like for all the input to remain as the user sent.
here is part of the code (the form):
Code: [Select]
<form action="<?php echo $_SERVER['PHP_SELF'];?>" method="post">

<fieldset>
<legend ><span><a>video</span></a></legend>
<ol>
<li>
<label for="hover_camera">hover camera</label>
<input id="hover_camera" type="radio" name="hover_camera" value="yes" /><b>yes</b>
<input id="hover_camera" type="radio" name="hover_camera" value="no"  /><b>no</b>
</li>
<li>
<label for="video_photographers">video photographers</label>
<input id="video_photographers" type="text" name="video_photographers" maxlength="1" size="1"/>
</li>
<li>
<label for="video_edit">video edit</label>
<input id="video_edit" type="radio" name="video_edit" value="short" /><b>short</b>
<input id="video_edit" type="radio" name="video_edit" value="long" /><b>long</b>
</li>
<li>
<label for="video_clip">video clip</label>
     <select name="video_clip">
         <option value="no">no</option>
         <option value="regular">regular</option>
<option value="staged">staged</option>
      </select>
</li>
</ol>
</fieldset><br />

<fieldset align="right"> 
    <legend><span><a>stills</span></a></legend>
<ol>
<li>
<label for="stills">stills</label>
<input id="stills" type="text" name="stills" maxlength="1" size="1"  />
</li>
<li>
<label for="increase">increase amount</label>
<input id="increase" type="text" name="increase" maxlength="4" size="1" />
</li>
<li>
<label for="magnets">magnets</label>
<input id="magnets" type="text" name="magnets" maxlength="4" size="1" />
</ol>
</fieldset><br />

<fieldset align="right"> 
    <legend><span><a>albums</span></a></legend>
<ol>
<li>
<label for="digital_album">digital album</label>
<input id="digital_album" type="radio" name="digital_album" value="yes" /><b>yes</b>
<input id="digital_album" type="radio" name="digital_album" value="no" /><b>no</b>
</li>
<li>
<label for="photo_album">photo album</label>
<input id="photo_album" type="radio" name="photo_album" value="yes" /><b>yes</b>
<input id="photo_album" type="radio" name="photo_album" value="no" /><b>no</b>
</li>
<li>
<label for="small_digital_album">small digital album</label>
<input id="small_digital_album" type="radio" name="small_digital_album" value="yes" /><b>yes</b>
<input id="small_digital_album" type="radio" name="small_digital_album" value="no" /><b>no</b>
</li>
</ol>
</fieldset><br />

<fieldset align="right">
<ol>
<li>
<label for="comments">comments</label>
<textarea id="comments" name="comments"></textarea><br /><br />
</li>
<li>
<label for="price">price</label>
<td><input type="submit" id = "price" name="price" value="calculate price" /></td>
</li>
</ol>
</fieldset><br />


<fieldset align="right"> 
    <legend><span><a>choose date</span></a></legend>
<ol>
<li>



      <input type="submit" id="isavailable" name="isavailable" value="isavailable"  />
  </li>
  </ol>
  </fieldset>
 
  <fieldset class="submit">
<ol>
<li>
<input class="submit" type="submit" id="submit" name="submit" value="done!" />&nbsp;&nbsp;&nbsp; <input class="submit" type="reset" id="reset" name="reset" value="reset" />
</li>
</ol>
</fieldset> 
 
</form>
thanks for the help

Well this may sound confusing. I tried to findways to allow users to input an integer value and then assign it to a variable called $quantity, but all I could find from the internet was the usage of forms. Do I have to use forms, or can I just try this this simple syntax:


$quantity = "<input name='quantity' type='text' id='quantity' size='3' maxlength='3'>";


If I do have to use forms, then how can I ever assign user's input value to a variable? Please help.

I manage a simple website for a small business - nothin fancy. I'm interested using some php to enhance the site a bit. I'm looking to accept some user input and put it into a database then display it back to them on another page. What php functions would be best to use to accomplish this?

Thanks for the input!