[KayGee]

Originally Posted by Naatan

Some usefull functions there

Function to get the user IP, since one single technique doesn't always work

PHP Code:

function get_IP() {
    if (empty($_SERVER["HTTP_X_FORWARDED_FOR"])) {
        $ip_address = $_SERVER["REMOTE_ADDR"];
    } else {
        $ip_address = $_SERVER["HTTP_X_FORWARDED_FOR"];
    }
    if(strpos($ip_address, ',') !== false) {
        $ip_address = explode(',', $ip_address);
        $ip_address = $ip_address[0];
    }
    return $ip_address;
} 


Or this one I got from another site, I don't remember where, it treats a string as if it is included by include();

Only downside is that you can't declare functions since it's already inside a function.

PHP Code:

function phpWrapper($content) {
    global $page;
    ob_start();
    $content = str_replace('<'.'?php','<'.'?',$content);
    eval('?'.'>'.trim($content).'<'.'?');
    $content = ob_get_contents();
    ob_end_clean();
    return $content;
} 


Or a function to echo a string and immediatly echo it without delay

PHP Code:

function _echo($echo) {
    echo $echo;
    flush();
    ob_flush();
} 


This one transforms a filename into a clean string, to be used as a title or whatever (for example, go_go_gadget.exe becomes "Go go gadget"

PHP Code:

function get_filetotitle($title) {
    $title = strip_path($title);
    $title = str_replace('_',' ',$title);
    $title = substr($title, 0, strrpos($title, '.'));
    $bits = explode(' ',$title);
    foreach ($bits AS $bit) {
        $return .= capitalize_firstchar($bit);
    }
    return $return;
}

function capitalize_firstchar($string) {
    return strtoupper(substr($string,0,1)).substr($string,1);
} 


It appears as though the PHP code above to transform a filename into a clean string is what I've been looking for. I'm on the ground floor with PHP, and without sounding like a complete idiot, I really need to know where this code goes and how to implement it on each of my web pages. I have a div for banner where I'd like the page title to appear. Do I simply place this code in the div?

[d*d]

lets not pollute this thread with questions and answer sessions, they can be dealt with in a new thread

[3n1gm4]

heres my pagination link function which will out put something like

<< < 4 5 6 7 8 9 10 > >>

PHP Code:

function page_this($url, $page, $number_of_items, $total_items, $trail_length=3, $append=false)
{        
    $number_of_pages = ceil($total_items/$number_of_items);        
    $seperator = (($append)? "&" : "?" ;
    
    // << < 
    if ( $page != 1 ){
        $pagination .= "<a href=\"".$url.$seperator."page=1&show=".$number_of_items."\"><<</a> ";
        $pagination .= "<a href=\"".$url.$seperator."page=".($page-1)."&show=".$number_of_items."\"><</a> ";
    } else {        
        $pagination .= "<< ";
        $pagination .= "< ";
    }
    
    // previous pages
    $count = $page-$trail_length;
    if ( $count <= 0 )
        $count = 1;
    for ( ; $count < $page; $count++) {
        $pagination .= "<a href=\"".$url.$seperator."page=".$count."&show=".$items_per_page."\">".$count."</a>";        
    }
    
    // current page
    $pagination .= $page . " ";
    
    // next pages
    for ( $count = $page; $count < $number_of_pages && $count < $page+$trail_length; $count++) {
        $pagination .= "<a href=\"".$url.$seperator."page=".$count."&show=".$items_per_page."\">".$count."</a>  ";
    }
    
    // > >>
    if ( $page < $number_of_pages ){
        $pagination .= "<a href=\"".$url.$seperator."page=".($page+1)."&show=".$number_of_items."\">></a> ";
        $pagination .= "<a href=\"".$url.$seperator."page=".$number_of_pages."&show=".$number_of_items."\">>></a> ";
    } else {
        $pagination .= "> ";
        $pagination .= ">> ";
    }
    return $pagination;
} 


and a quick simple example

PHP Code:

$conn = mysql_connect('localhost','root','');
mysql_select_db('phpnews');

if(isset($_GET['page']) && isset($_GET['show']))
{
    $show = $_GET['show'];
    $limit = ($_GET['page']-1).",".$show;
    $page = $_GET['page'];
}
else
{
    $show = 10;
    $limit = "0,".$show;
    $page = 1;
}



$sql = "SELECT * FROM phpnews_news LIMIT " . $limit;
$news_rs = mysql_query( $sql );

$sql = "SELECT COUNT(*) as total FROM phpnews_news";
$total_rs = mysql_query( $sql );
$total = mysql_fetch_array($total_rs);

while ( $news = mysql_fetch_array($news_rs) )
{
    echo $news['titletext'] . "<br><br>";
}

echo page_this("pagination.php?hello=2",$page,$show,$total['total'],2,1); 


[Cborrow]

This isn't a function but a bunch of functions(methods) in a container(class)
I created a couple of classes that I use GDImage and GDDraw both in the same file.

I just attached the file because it is pretty big, but I will put a simple example here.

Note: This is still a work in progress, so there might be one or so things that might not work
exactly as planned but so far I have not had any problems what so ever.

PHP Code:

<?php
    header("Content-type: image/gif");
    
    include "GDLibrary.php";
    
    $image = new GDImage(null, null, "test.jpg");
    $image->Pixelate(12);
    $image->Render("gif");
?>

and one more example while using the GDDraw class

PHP Code:

<?php
    header("Content-type: image/gif");
    
    include "GDLibrary.php";
    
    $image = new GDImage(500, 400);
    $image->FillColor("#fff");
    
    $draw = new GDDraw($image->GetImageResource());
    $draw->DrawRectangle(10, 10, 100, 60, "#ff0000");
    
    $image->Render("gif");
?>

Each method is documented in the classes so it should be pretty easy to see
how everything will work and such.

[pgo]

Something I recently wrote...

PHP Code:

function alphanumeric_underscores($string) {
    // Converts a string into an underscores-instead-of-spaces, all-lower-case, alphanumeric string.
    // "This function isn't too complex" becomes "this_function_isnt_too_complex".
    $string = strtolower($string);
    $string = ereg_replace("[^A-Za-z0-9 ]", "", $string);
    $string = str_replace(" ", "_", $string);
    return $string;
} 


[RaelRode]

PHP Code:

function make_safe($make_safe) 

    {

        if(get_magic_quotes_gpc())// If magic quotes is enabled

                {

                    $string = stripslashes($string);//Remove slashes from the string

                }

                else //If not 
                    {

                        $make_safe = addslashes(trim($make_safe));

                    }

            $make_safe = escapeshellcmd($make_safe); //Remove all SHELL commands

            $make_safe = escapeshellarg($make_safe); //Remove all SHELL commands to be run as an argument

            $make_safe = mysql_real_escape_string($make_safe); //Stop MOST MySQL injections

            $make_safe = stripslashes(strip_tags(htmlspecialchars($make_safe, ENT_QUOTES))); //Remove XHTML, remove slashes

        

        return $make_safe; // Return the safe string

    } // End make safe functions 


PHP Code:

// This function encrypts users passwords 3 times.

    function encrypt($encrypt)

    {

        $encrypt = md5($encrypt); // Encrypt the string to MD5

        $encrypt = sha1($encrypt); // Encrypt the MD5 string to SHA1

        $encrypt = md5($encrypt); // Encrypt the SHA1 string to MD5 AGAIN!!

        return $encrypt; // Return the encrypted string.

    } // End encryption function 


PHP Code:

// This function check if a user has used a correct email, if not, it dies.

    function check_email($check_email) 

    {

        $_name = "/^[-!#$%&'*+./0-9=?A-Z^_`{|}~]+"; // Name check, bit before @

        $_host = "([-0-9A-Z]+.)+"; // Host check, bit after @

        $_tlds = "([0-9A-Z]){2,4}$/i"; // TLD check, bit after .

        

            if(!preg_match($_name."@".$_host .$_tlds,$email)) // If the email isn't valid..

                {

                    die("Please enter a valid email address"); // Kill the function

                }

                else // if email is valid

                    {

                    return $check_email; // Return the email string

                    }

    } // End check email function

} 


These aren't too complex, but they work, so yeah. Happy XMAS!!!!!!

I love using die(); in my scripts. XD

[proc355]

rael: comments, meant to be constructive ok? and i've avoided php for ages now so really only general stuff

it's hashing not encryption; also, dont multi-hash things - it does nothing except chew resources - you want a salted hash

you're checking for magic quotes twice which is just a waste of resources - lose the elseif and just else it

surely a method that checks for the validity of something should return a boolean rather than a string? (check_email).

your naming sucks i.e. check_email - perhaps is_valid_format_email instead? slightly more verbose but it reads better, follows php conventions and allows for a consistent scheme e.g. is_valid_format_address etc.

naming your args the same as your methods is useless

[RaelRode]

I commented it because I wasn't the only developer, and I was giving it to my friend who wanted to learn PHP.

Naming convention, ok I see your point.

The make_safe function...well yeah it seemed logical before but maybe not...shit. Lol.

Oh and as for the mutiple encryption / encoding, I will write a new one later on.

[proc355]

lol i didnt mean your comments

[brucec]

Used for security redirects while users log in. It works well.

PHP Code:

function LoginRedirect($u,$p)
{
$users=fill with 2 dimensional array of users and passwords;
$error = CREATE LOGIN ERROR HERE;
$url = URL to redirect user to.

    $enteredUsername = $u
    $enteredPassword = $p;

    for($r=0; $r<sizeOf($users); $r++)
    {
        if($users[$r][0]==$enteredUsername)
        {
            if($users[$r][1]==$enteredPassword)
            {
                $_SESSION['loggedin']="yes";
                $_SESSION['username']=$enteredUsername;
                $_SESSION['contact']=$users[$r][2];
                header("Location:$url");
            } 

            break;
        }
    }

}
return $error;
} 


[PoeT4eva41]

Wow awesome scripts, specially this one.

Originally Posted by RaelRode

PHP Code:

// This function encrypts users passwords 3 times.

    function encrypt($encrypt)

    {

        $encrypt = md5($encrypt); // Encrypt the string to MD5

        $encrypt = sha1($encrypt); // Encrypt the MD5 string to SHA1

        $encrypt = md5($encrypt); // Encrypt the SHA1 string to MD5 AGAIN!!

        return $encrypt; // Return the encrypted string.

    } // End encryption function 


And one from me.

PHP Code:

echo 'something'; 


To write something, on the page.

[Mesrop]

my simple and useful func.

PHP Code:

function querysingle($query, $i=0){
$result=@mysql_query($query);
$row=@mysql_fetch_array($result);
return $row[$i];
} 


$string=querysingle("select `name` from `users` where `id`='1' ");

or

$string=querysingle("select * from `users` where `id`='1' ", "name");

[Cborrow]

Got a easy to use function for resizing images, while keeping the aspect ratio.

The function.

PHP Code:

<?php
    /*
        ImageThumb - Creates a thumbnail image from another based on specified sizes
        
        SourceImage - The location of the image in which you want to resize
        DestImage - The location to save the thumb, use null if you want to just display to browser
        Width - The resized width of the image
        Height - The resized height of the image
        Type - The image type in which you want to save
        
        Note: The thumb is resized while keeping the aspect ratio, so width and height are not the
        absolute width and height.
    */
    
    function ImageThumb($sourceImage, $destImage, $width, $height, $type = "png") {
        $imageSize = getimagesize($sourceImage);
        
        if($imageSize[0] > $imageSize[1]) {
            $newWidth = $width;
            $newHeight = $imageSize[1] * ($newWidth / $imageSize[0]);
        }