PHP - Validating Exif Data

Hi,

I want to create a function that reads the exif orientation data of an image and rotates it as required - needs to run before before the resize function here, I'm using GD library if that is relevant:

function resize_gd($sourceFileName, $folder, $destinationFileName, $newWidth, $newHeight, $keepProportion)
	{
		$newWidth = (int)$newWidth;
		$newHeight = (int)$newHeight;
		if (!$this->gdInfo >= 1 || !$this->checkGdFileType($sourceFileName)) {
			return false;
		}
		$img = &$this->getImg($sourceFileName);
		if ($this->hasError()) {
			return false;
		}
		$srcWidth = ImageSX($img);
		$srcHeight = ImageSY($img);

		if ( $keepProportion && ($newWidth != 0 && $srcWidth<$newWidth) && ($newHeight!=0 && $srcHeight<$newHeight) ) {
			if ($sourceFileName != $folder . $destinationFileName) {
				@copy($sourceFileName, $folder . $destinationFileName);
			}
			return true;
		}
		
		if ($keepProportion == true) {
			if ($newWidth != 0 && $newHeight != 0) {
				$ratioWidth = $srcWidth/$newWidth;
				$ratioHeight = $srcHeight/$newHeight;
				if ($ratioWidth < $ratioHeight) {
					$destWidth = $srcWidth/$ratioHeight;
					$destHeight = $newHeight;
				} else {
					$destWidth = $newWidth;
					$destHeight = $srcHeight/$ratioWidth;
				}
			} else {
				if ($newWidth != 0) {
					$ratioWidth = $srcWidth/$newWidth;
					$destWidth = $newWidth;
					$destHeight = $srcHeight/$ratioWidth;
				} else if ($newHeight != 0) {
					$ratioHeight = $srcHeight/$newHeight;
					$destHeight = $newHeight;
					$destWidth = $srcWidth/$ratioHeight;
				} else {
					$destWidth = $srcWidth;
					$destHeight = $srcHeight;
				}
			}
		} else {
			$destWidth = $newWidth; 
			$destHeight = $newHeight; 
		}
		$destWidth = round($destWidth);
		$destHeight = round($destHeight);
		if ($destWidth < 1) $destWidth = 1;
		if ($destHeight < 1) $destHeight = 1;
		
		$destImage = &$this->getImageCreate($destWidth, $destHeight);

Edited June 7, 2019 by mcfc4heatons

Hi there,
on my yardmaps website, if a user uploads an image taken with an iphone, and the exif data sets orientation to 1, the image is automatically rotated when put through the imagecopyresampled function.

If I take the same image, and strip out the exif data with photoshop (save as for web, no meta data), the image uploads correctly.

Is there any way to force imagecopyresampled to not rotate the image?

Thanks
B

How much should you validate a First Name?

This is my code...

// Validate First Name.
if (empty($trimmed['firstName'])){
$errors['firstName'] = 'Please enter your First Name.';
}else{
if (preg_match('#^[A-Z \'.-]{2,20}$#i', $trimmed['firstName'])){
$firstName = $trimmed['firstName'];
}else{
$errors['firstName'] = 'First Name must be 2-20 characters (A-Z \' . -)';
}
}

I did this for fear if I left things wide-open it would be a security risk.

And in the U.S. at least, the above would really cover all valid First Names.

Thoughts?



Debbie

Hi, I have a user system where people login to my site with their emails. The thing I am after is when a person is registering I want to validate that they have entered a valid email with @.com in the string and not just some repetitive characters e.g. wwwwwww. Could some one guide me what is the best way to check for a valid email and for repetive characters in any given field examle firstname. One last thing I would also like to check that a person only enters Alphabets for name and stuff.

Hello all,

I need your help again. I have this page where the user inputs data:


<?php
include "include/dbc.php";

include "include/header.inc";

#error checking will go here
?>

<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 name="metric[]">
<option value=""></option>
         <option value="mile">mile</option>
             <option value="Km">km</option>
             <option value="M">m</option>;
             <option value="Yard">yrd</option>
             <option value="Feet">ft</option>
            </select></div></td></tr>';
echo'<input type="hidden" name="submitted" value="1">';

}
mysql_close();
?>

<tr><td colspan="6" align="center"><input type="submit" name="submit" value="Add Activities" onClick="return confirm(
  'Are you sure you want to submit the 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;
<div></div>
<?php include "include/footer.inc"; ?>


I want to validate that the user enters data for at least one of all the fields provided (distance, duration, metric). If someone could help me get started I'd greatly appreciate it.

I have the following code below to validate a date that the user types in. But I am getting the following error: "Warning preg_match() [function.preg-match]: Unknown modifier '('"

Code: [Select]
if(!empty($_POST['exp_date'])) {

$pattern = '(^[0-9]{1,2})'    // 1 or 2 digits
                .'([^0-9a-zA-Z])'   // not alpha or numeric
                .'([0-9]{1,2})'     // 1 or 2 digits
                .'([^0-9a-zA-Z])'   // not alpha or numeric
                .'([0-9]{1,4}$)';   // 1 to 4 digits

$exp_date = trim($_POST['exp_date']);

if(preg_match($pattern, $exp_date)){

$pattern = '(^[0-9]{1,2})'    // 1 or 2 digits
                .'([^0-9a-zA-Z])'   // not alpha or numeric
                .'([a-zA-Z]{1,})'   // 1 or more alpha
                .'([^0-9a-zA-Z])'   // not alpha or numeric
                .'([0-9]{1,4}$)';   // 1 to 4 digits

if (preg_match($pattern, $exp_date)){

    $pattern = '(^[a-zA-Z]{1,})'  // 1 or more alpha
                .'([^0-9a-zA-Z])'   // not alpha or numeric
                .'([0-9]{1,2})'     // 1 or 2 digits
                .'([^0-9a-zA-Z])'   // not alpha or numeric
                .'([0-9]{1,4}$)';   // 1 to 4 digits

  if (preg_match($pattern, $exp_date)){
 
$pattern = '(^[a-zA-Z]{1,})'  // 1 or more alpha
                     .'([0-9]{2})'       // 2 digits
                     .'([0-9]{4}$)';     // 4 digits

   if (preg_match($pattern, $exp_date)){
   
      $pattern = '(^[0-9]{4})'      // 4 digits
                          .'([^0-9a-zA-Z])'   // not alpha or numeric
                          .'([0-9]{1,2})'     // 1 or 2 digits
                          .'([^0-9a-zA-Z])'   // not alpha or numeric
                          .'([0-9]{1,2}$)';   // 1 to 2 digits
 
    if (preg_match($pattern, $exp_date)){

    $pattern = '(^[0-9]{2})'      // 2 digits
.'([0-9]{2})'       // 2 digits
.'([0-9]{4}$)';     // 4 digits

   if (preg_match($pattern, $exp_date)){
   
       $pattern = '(^[0-9]{4})'      // 4 digits
  .'([^0-9a-zA-Z])'   // not alpha or numeric
      .'([a-zA-Z]{1,})'   // 1 or more alpha
  .'([^0-9a-zA-Z])'   // not alpha or numeric
  .'([0-9]{1,2}$)';   // 1 to 2 digits
   
   } else {
   
      $errors[]= 'Please enter a valid expiration date.';
 
  } 

} else {

   $errors[]= 'Please enter a valid expiration date.';
   
}   
   
   } else {
   
      $errors[]= 'Please enter a valid expiration date.';
   
   }
 
  } else {
 
      $errors[]= 'Please enter a valid expiration date.';
 
  }

} else {
 
    $errors[]= 'Please enter a valid expiration date.';

}

} else {

   $errors[]= 'Please enter a valid expiration date.';
   
}

} else {

   $errors[]= 'Please input an expiration date.';

}

This topic has been moved to Other Programming Languages.

http://www.phpfreaks.com/forums/index.php?topic=347582.0

Hello..

I have Two HTML form and one is a Check boxes form that enable users to select their category. Then I need to display second form according to the categories they selected in first form. I use this code in first form to validate form submission..

      if ( isset( $_POST['category']) && sizeof( $_POST['category']) <= 3) {
      
         $category = $_POST['category'];         
         
      } else {
      
         $errors[] = 'Please select atleast 1, not more than 3 categories';
      }

If errors array is empty I did this..

      if ( empty( $errors )) {  // If everything's OK      
               
         $_SESSION = $category;
         
         $url = 'http://localhost/lanka_institute/tutorsignup/select_subjects.php? // Define the URL.
         ob_end_clean(); // Delete the buffer.
         header("Location: $url");
         exit(); // Quit the script.   
         
      }   


Can I know and is this correct? I display category list from mysql category table, it has category name and category id

this is my html part from first page

      echo '<td width="50%"><input type="checkbox" name="category[]"  vlaue="' . $info['category_id'] . '" />&nbsp;&nbsp;' . $info['category_name'] . '</td>';


any help appreciated.

Thanks in advance..

Hi all,

Hi have a bit of a problem that I am completely stuck on.  I have a form on a website that needs checkboxes to be processed by PHP, but i have no idea how to implement them.  I have found examples, but my knowledge of php is exactly zero, so its confusing the hell out of me.

The website is:

http://www.geelongnannies.com.au/test/employment.html
http://www.geelongnannies.com.au/test/freecontactformprocess3.php
http://www.geelongnannies.com.au/test/freecontactformsettings.php

if anyone can have a look and give me an example of how to change the php to process the checkboxes when submitted, I will be very grateful

cheers!

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.

Hi All,

I'm trying to validate file types and keep seeing an error.  I only allow .gif, .jpg or .png.  However, if I upload any of those file types, I get an error message....  If I echo out $filetypeCheck, I get image/png, which is corrent...

Code: [Select]
$filetypeCheck = $_FILES["file"]["type"];

if( ($filetypeCheck != "image/gif") || ($filetypeCheck != "image/jpeg") || ($filetypeCheck != "image/png") )
{
$val_error[] = 'File Type Error! (.gif, .jpg and .png only)';
}

Whats going on here?

I am debugging a PHP file that validates a user registration form. I'm very confused on this error message I'm receiving.

( Parse error: syntax error, unexpected '[' in C:\wamp\www\reg.php on line 17 )

I have looked until I cross-eyed to finf the syntax error. Here is a copy of my code:

<?php 

// Post registration to database
// Connects to your Database 
$userName = "taft65_admin";
$passWord = "taft65_paris4505";
$host="localhost";
$dbName = "taft65_members";

 mysql_connect("dbName", "userName", "passWoord", "host") or die(mysql_error()); 
 mysql_select_db("dbn") or die(mysql_error()); 
 
 //This code runs if the form has been submitted
 if (isset($_POST['submit'])) { 
 
 [color=yellow]//This makes sure they did not leave any fields blank
 if (!$_POST['id'] | !_POST['userName'] | !$_POST['passWord'] | !$_POST['confpassWord'] | !$_POST['email'] ) {
  die('You did not complete all of the required fields');
  }[/color]
 
 // checks if the userName is in use
  if (!get_magic_quotes_gpc()) {
  $_POST['userName'] = addslashes($_POST['userName']);
  }
 $usercheck = $_POST['userName'];
 $check = mysql_query("SELECT userName FROM users WHERE userName = '$usercheck'") 
 or die(mysql_error());
 $check2 = mysql_num_rows($check);
 
 //if the name exists it gives an error
 if ($check2 != 0) {
  die('Sorry, the userName '.$_POST['userName'].' is already in use.');
  }
 // 
this makes sure both passWoords entered match
  if ($_POST['passWord'] != $_POST['ConfPassWord']) {
  die('Your passWoords did not match. ');
  }
 
  // here we encrypt the passWord and add slashes if needed
  $_POST['passWord'] = md5($_POST['passWord']);
  if (!get_magic_quotes_gpc()) {
  $_POST['passWord'] = addslashes($_POST['passWord']);
  $_POST['userName'] = addslashes($_POST['userName']);
  }
 
 // now we insert it into the database
  $insert = "INSERT INTO registration (userName, passWord, email )
  VALUES ('".$_POST['userName']."', '".$_POST['passWord'].", '".$_POST['email']."')";
  $add_member = mysql_query($insert);
 
?>

 <p>Thank you, you have successfully registered.&nbsp;&nbsp;
 <a href="memPage.html"></a>you may now login.</p>



Can someone help me with this by checking the code and tell me where I wen in error.

BobLan66

This topic has been moved to JavaScript Help.

http://www.phpfreaks.com/forums/index.php?topic=310792.0

A form on my website uses several drop down boxes.

One to select an id number from a list retrived by a query.

The others to get a start and stop time.  Using two for each, one for hours, one for minutes.

I already have some validation code which works fine, however, I can't seem to be able to use > or < mathematical signs with the times (ie, the start time must be < than the stop time).

Also, I have Code: [Select]
value="<? echo $name; ?>" in each of the fields to re-insert the data as it gets erased if the form isn't correct.  How do I do the same for the drop downs?

I hope this makes sense.

Code: [Select]
<?
 // only validate form when form is submitted
 if(isset($Submit)){
      $error_msg='';
      if(trim($starttime)==(trim($stopttime))) { //drop down
           $error_msg.="starttime cannot equal stop time.<br>";
      }
      if(trim($starttime)>(trim($stopttime))) {  //drop down
           $error_msg.="starttime cannot be greater than stop time.<br>";
      }
      if(trim($startfuel)<(trim($stopfuel))) { //text field
           $error_msg.="Departure fuel cannot be less than arrival fuel<br>";
      }
      if(trim($id)=="sca") { //query powered drop down (this one works, but doesn't re-select the option
           $error_msg.="Please select the id number.<br>";
      }
http://southerncrossairlines.ausvirtual.com/New%20Site/Complete/validation/Untitled-1.php

i'm trying to an if statement so that a piece of code is only executed if a returned variable equals a letter in the alphabet(any letter)
the variable is from a $_GET, and all i want to check is if the variable contains a letter.
This is what i have so far, but it doesnt work


$sort=$_GET[orderby];
if ($sort=="[A-Z]") {
$read=mysql_query("SELECT * FROM films WHERE title LIKE '".$sort."%'") or die(mysql_error());
$result=mysql_num_rows($read);
}
else { 
$read=mysql_query("SELECT * FROM films ORDER BY title") or die("query failed");
$result=mysql_num_rows($read);
}


Any help would be great.