[[SOLVED] Quick string question]

<?php
$string = "blahblah_blah_stuff.php";
$postfix = $postfix[count($postfix = preg_split('/_|\./',$string))-2];
echo $postfix;
?>

 

Thanks for the help everyone, I'll go with Crayon's solution.

[[SOLVED] Quick string question]

Hi everyone, my PHP skills are a bit rusty, so...

 

I'm using

basename($_SERVER['PHP_SELF'])

to get (for example) blahblah_blah_stuff.php.

 

What would be the best way to extract just the word "stuff" (the word right before ".php" and right after the last underscore) from it?

 

[Question about || in PHP]

Hello,

 

I find myself using quite a bit of (example):

 

function say_greeting($greeting = null) {
   $greeting = ($greeting) ? $greeting : 'Hello!'
   echo $greeting;
}

 

in my code (return $greeting if set, otherwise return 'Hello!'), and it's certainly not very DRY. In Ruby, a simple:

 

def say_greeting(greeting = nil)
   print greeting || 'Hello!'
end

 

does the trick. I'm wondering if I can do something similar in PHP instead of what I am doing? Thanks!

[best way to list everything in a table?]

If I understand what you're talking about (fetching records from a table), then I think this is what you want...

 

$query = mysql_query("SELECT * FROM stuff ORDER BY 'id'");

while ($row = mysql_fetch_array($query)) {
  echo $row['column_name'];
  echo $row['different_column_name'];
  # etc...
}

 

Much easier

[Possible to check if a function has been called?]

Hello,

 

Is it possible to check if a function was called within a certain page? If so, how? Thanks.

[Need help with RewriteRule and RewriteCond.]

I have an .htaccess file which contains RewriteRule and RewriteCond statements. Here is the code (snippets are examples):

 

RewriteCond %{REQUEST_URI} /cat [OR]
RewriteRule ^([^/\.]*)/?$ cat.php?kitty=$1 [L]

 

That way when the URL is mysite.com/cat/foo, foo is kitty. The problem is that "kitty" is applied to all pages. I tried adding

 

RewriteCond %{REQUEST_URI} !(/cat) [OR]
RewriteRule ^([^/\.]*)/?$ index.php?something=$1 [L]

 

So that if the URL does not end with /cat, "kitty" will be "something". But this does not work. How can I fix this? Thank you!

[[SOLVED] Image size function in pixels?]

Of course you could also use getimagesize() in an if statement, and not have the upload continue if the size is not within your desired range.

["Flexible" functions a possibility?]

Thanks for the help! btherl, your method works great but I have one question: what exactly are the ampersands do?

["Flexible" functions a possibility?]

Hello,

 

Is it at all possible in PHP to have "flexible" functions? For example, there's a function which has 3 parameters, and I only want to utilize 2 - the first one and last one. Instead of typing

 

myFunc('first', false, 'third');

 

Could I/how would I do this?

 

myFunc('first', $thirdparam = 'third');

 

(Assuming $thirdparam is the same variable used to declare the third parameter when creating the function.)

 

Using Rails has had me wanting this functionality in PHP Thanks for the help!

[[SOLVED] Using flat file databases]

But is there any extremely large disadvantages? If a MySql database has a lot of information, won't it load slowly as well?

 

Not necessarily. If you use a RDMS, and you only need to call rows with a certain condition (like this)

 

mysql_query("SELECT * FROM mytable WHERE myfield = 'something'");

 

and if it returns, say, 3 rows - that will take no time at all. However, when using a flat file, you'd need to load the whole file first before calling whatever information. Plus, it is extremely easy to work with MySQL in PHP.

[[SOLVED] simple email check]

You should change the ereg function to eregi, otherwise someone can enter in an email address such as "JoeSmith@blah.com" and have it be invalid.

[[SOLVED] sessions]

say a nonmember knows a page with in the site that should be restricted ex. main.php and they enter that in as the url ex. www.site.com/main.php what restricts them from viewing it?

 

On every page you want to restrict, you can put

 

<?php if (!isset($_SESSION['sessionname']) { header('location: index.php'); } ?>

 

at the very top of the page. If there is no session, it redirects to index.php (you can also change index.php to whatever you want, like a page saying they were trying to access a restricted section of the site).

[A simple php echo question]

The one that you use (in my opinion) is the best way, however the last

 

."";

 

is not needed (of course keep the semicolon).

[onClick attribute 'this' not working.]

Thank you, however it still does not work. But if I replace it with the following (for testing purposes):

 

function buttonDown(obj) {
   obj.style.visibility = 'hidden';
}

 

It works fine. Why is this?

[onClick attribute 'this' not working.]

Hello,

 

I'm not that good in JavaScript, so bare with me. In an external JS file, I have the following function:

 

function buttonDown(obj) {
   obj.style.backgroundImage = 'url(\'images/button-down.png\')';
}

 

And then I have an onClick attribute applied to a div:

 

<a onclick="buttonDown(this)"><div id="button"></a>

 

This isn't working for some reason... but when I put the function code into the onClick attribute itself, it does work. Thank you for your help!

[[SOLVED] login script issue :(]

Someone posted a comment saying "[..] but your attitude not to close td and tr tags drives me crazy " and the video poster replied "lol, thanks, yeah, I am not that strict on ending tags". That right there is a huge hint not follow any of his techniques. And he sounds 13 ._.

 

Thank you, thorpe, for that link! I have not known about until now. Very good resource.

 

P.S.: My squal.

[Mysql error...]

Change

 

$result = mysql_query($query);

 

to:

 

$result = mysql_query($query) or die (mysql_error());

 

and post the output.

[Better user validation other than cookies?]

Hey there,

 

I know how to authenticate users and all that (get matches from a database, if there's a match set a cookie, etc. etc.), but I'm wondering if there's a better, more secure way to validate a user other than a cookie. Currently, the best way I know how to validate someone is to store someone's username in a cookie, and get their info by the SQL statement below:

 

mysql_query("SELECT * FROM users WHERE username='".$_COOKIE['username']."');

 

Which, I can assume is not that secure.

 

Yes, I know all about sessions, and I would much rather use them, but the only thing not wanting me to is the abililty (or lack thereof) for sessions to expire at the time I specify (for example when a user clicks 'Remember Me' during login). Or do I just not know about session expire time?

 

I've heard of someone saying to store the cookie contents into a session, and just use all the sessions in the queries and what not, but can't a user just edit the cookie value thus making a session the same value? (A user can edit cookie values, right?)

 

I'm looking forward to all of your information, and thanks for the help.

[Quick Question On PHP Register and Login Scripts - MYSQL Error]

Just curious, how do you know PHP but not even the basics of MySQL/SQL? Read the MySQL docs and/or use a database management system such as phpMyAdmin.

[Get Filename]

You just want to get the file name before the period? A simple

 

$ext = explode('.', $filename);
echo $ext[0];

 

should suffice.

[uploading an image to a file server]

Hmm,

 

I copied your code and modified it to work on my webserver. First, I gave the submit button a name, and then added an if statement around move_uploaded_file so that it only tries to upload when the submit button is clicked. Also, did you chmod your images folder to 777?

 

Here is the new code:

<form action="upload.php" method = "post" enctype = "multipart/form-data">

       Photographer name: <input type="text" name="authorname" size="40" />      

       Upload File: <input type="file" name="filename" id = "filename" size="40" />     

       File Type: <select name = "select">
                  <option value = "JPEG">JPEG</option>
                  <option value = "GIF">GIF</option>
                  <option value = "PNG">PNG</option>
                  <option value = "other">Other</option>
                  </select>
             

       Photo Name: <input type = "text" name = "photoname" />           

       Photo Description: <input type = "text" name = "photodescription" />
                                                                 


       <input name="submit" type="submit" value = "submit"/>
        <input type="reset" value = "reset"/>


    </form>
    
<?php
include("connect.php");
$path = "/images/";
$authname = $_POST['authorname'];
$phototype = $_POST['select'];
$photoitself = $_POST['filename'];
$photoname = $_POST['photoname'];
$photodesc = $_POST['photodescription'];

if ($_POST['submit']) {
   if (move_uploaded_file($_FILES['filename']['tmp_name'], $path.$_FILES['filename']['name'])) {
      echo 'Image uploaded!';
   } else {
      echo 'Sorry, your image wasn\'t uploaded. Upload error: '.$_FILES['filename']['error'];
   }
}
?>

 

That should do it for you. Good luck!

[[SOLVED] mysql query]

It seems like you're nesting 2 of the same things ($result), and could be better typed like this:

 

<?php
if ($result = mysql_query("SELECT username,password FROM login WHERE username = '$emailID' and userpassword='$password'")) {
  $flag = 1;
} else {
  $flag = 0;
}
?>

 

Try that, and see how it works.

[uploading an image to a file server]

You should change this line:

move_uploaded_file($files['filename']['tmp_name'],"/public_html/images/" . $_FILES['filename']['name']);

to:

move_uploaded_file($_FILES['filename']['tmp_name'],"/public_html/images/" . $_FILES['filename']['name']);

 

If that doesn't help, you could change the above to:

 

if (move_uploaded_file($_FILES['filename']['tmp_name'],"/public_html/images/" . $_FILES['filename']['name'])) {
  echo 'Image uploaded!';
} else {
  echo 'Error: '.$_FILES['filename']['error'];
}

 

And then look up the error code here: http://us3.php.net/manual/en/features.file-upload.errors.php

 

Also, is addphoto3.php the PHP code you posted? If so, then you should remove '/public_html/' from the above line.

[connecting tables problem]

In the first table you mentioned, you could put a field titled 'comment_id', which maches the id in the second table, then use a WHERE clause in your SQL when showing your comments (ie: "WHERE comment_id=X").

[Sessions & Cookies...]

The random characters in the session is the encrypted value of it. To display the un-encrypted value, just do

<?php
echo $_SESSION['name'];
?>

So if $name was, for instance, 'Andrew', then the above code would display 'Andrew'.