PHP - Multiple Line Graph

Hi, I'm modifying the following PHP code from a Wordpress plugin:

/* Byline. */

if ( $instance['byline'] )
echo do_shortcode( "<p class='byline'>{$instance['byline']}</p>" );

/* Entry title. */

if ( 'widget' !== $instance['entry_container'] && $instance['entry_title'] && $show_entry_title ) {
the_title( "<{$instance['entry_title']} class='entry-title'><a href='" . get_permalink() . "' title='" . the_title_attribute( 'echo=0' ) . "' rel='bookmark'>", "</a></{$instance['entry_title']}>" );
}
elseif ( 'widget' !== $instance['entry_container'] && $show_entry_title ) {
the_title( "<a href='" . get_permalink() . "' title='" . the_title_attribute( 'echo=0' ) . "' rel='bookmark'>", "</a>" );
}

The output currently is:
Code: [Select]
[ December 13, 2010 ]

Post Title
I'm trying to combine the two so that the output appears on one line.  What is the operator to execute multiple command in one statement?

Thanks.

Hi All,

Are there any decent PHP graph solutions out there?

I have an SQL statement that returns 12 numberical values in an array (mssql_fetch_array).

I would like to plot these values on a graph.

Thanks
Matt

hi guys  ..I want to create graphs in php. Data will be taken by mysql ofcourse... I have seen lots of options like fusion chart xml, phpgraphlib and so on...

my question is

What will be the best library or tool. What will be your recommendation to create graphs.

Thanks

I'm working on PHP Math for my assignment, and it requires a graph to show the functions.
But, i have no idea how to build a x-y-z (3D) graph.... All codes that i have search only for 2-dimensional (x-y axis) only..

Is there any help or solutions to make a 3-dimensional graph using PHP or Javascript?

thank you before

Hi everyone,

Newish to PHP and I'm sure this is a simple thing but I was hoping someone could help me out.

I have a php file that draws a graph for me (it takes in the coordinates from a text file). What I want to do is insert a red line at the top of the graph (not from start to finish, but starting at a certain point in the graph and finishing at another point).

This php code achieves the line I would like to insert into the graph:

<?php
$canvas = imagecreatetruecolor(1000, 10);

// Allocate colors
$red = imagecolorallocate($canvas, 255, 0, 0);

ImageFilledRectangle($canvas, 0, 0, 1000, 10, $red);


// Output and free from memory
header('Content-Type: image/jpeg');

imagejpeg($canvas);
imagedestroy($canvas);
?>


I need to insert this into this php script:

<?php
$width = 1000; //width and height of the resulting image
$height = 230;

$drawLastLine = false; //draw 9th line or not
$testMode = false; //render only 10 images



//returns directory with cached images by name of text file
function getCacheDirectory($fname)
{
    $mod = filemtime($fname);
    $dirname = "cache/" . $fname . "." . $mod . "/";
    return $dirname;
}

//checks if specified txt file is cached
function isCached($fname)
{
    $dirname = getCacheDirectory($fname);
    return file_exists($dirname);
}

//calculated y-coordinates of base-lines for all 9 lines, returns an array
function initStart($height, $number = 9)
{
    $d = $number + 1;
    $t = $height / $d;
    $res = array();
    $c = 0;
    for ($i = 0; $i < $number; $i++)
    {
        $c += $t;
        $res[$i] = $c;
    }
    return $res;
}


//draws vertical grey line with specified coordinate
function drawVerticalLine($img, $x)
{
    $grey = imagecolorallocate($img, 80, 80, 80);
    $h = imagesy($img);
    imagesetthickness($img, 3);
    imageline($img, $x, 0, $x, $h, $grey);
    imagesetthickness($img, 0.1);
}

//cuts unfilled part of image in the right, making its width equal to $realW
function cutRight($img, $realW)
{
    $h = imagesy($img);
    $new = imagecreatetruecolor($realW, $h);
    imagecopy($new, $img, 0, 0, 0, 0, $realW, $h);
    return $new;
}

//makes up an array of required colors
function allocateColors($img)
{
    $result = array();
    $result['blue'] = imagecolorallocate($img, 0, 0, 255);
    $result['red'] = imagecolorallocate($img, 255, 0, 0);
    $result['black'] = imagecolorallocate($img, 0, 0, 0);
    $result['white'] = imagecolorallocate($img, 255, 255, 241);
    return $result;
}

//main function which generates all the images
function generateImages($fname)
{
    
    set_time_limit(0); //there's no time limit, because it's long process
    global $width, $height, $start, $testMode, $drawLastLine;
    
    $lines = 9;
    $start = initStart($height, $drawLastLine ? $lines : $lines - 1);

    //colors of line from top bo bottom
    $lineCol = array('blue', 'blue', 'red', 'red', 'blue', 'blue', 'black', 'red', 'red');
    
    $fp = fopen($fname, "r"); //we open our file with data
    $header = fgets($fp);

    $curX = 0;
    $sumX = 0;
    $imgNum = 1;

    $colors = false;
    $const = 1.0; //that's the constant which can be used to multiply by y-coordinates, i.e. making our graphs scalable by y-coordinate

    $prevY = array();
    for ($i = 0; $i < $lines; $i++)
    {
        $prevY[$i] = 0;
    }

    $dir = getCacheDirectory($fname);
    mkdir($dir);
    $img = false;

  //  $maximumImages = 10;

    //if we are testing, we will do just 10 images, else we will work until the file ends
    while ((!$testMode || ($testMode && $imgNum < $maximumImages)) && $line = fgets($fp))
    {
        //if it's time to make up a new image
        if ($sumX % $width == 0)
        {
            //we save old one to file
            if ($img)
            {
                imagegif($img, $dir . $imgNum . ".gif");
                $imgNum++;
            }
            //and create a new one, along with allocating colors and so on
            $img = imagecreatetruecolor($width, $height);
            $colors = allocateColors($img);
            imagefill($img, 0, 0, $colors['white']);
            $curX = 0;
        }
        $data = explode(",", $line);
        $time = array_shift($data);

        $linesCount = $drawLastLine ? $lines : $lines - 1;
        //we loop through our lines
        for ($i = 0; $i < $linesCount; $i++)
        {
            
            $ly = $data[$i] * $const; //it's the new Y coordinate, and we counts from baseline with y = 0
            $realTo = $start[$i] + $ly; //now we count the baseline too

            $realFrom = $start[$i] + $prevY[$i]; //that's the previous step's y-coordinate
            $prevY[$i] = $ly; //we remember current coordinate to draw line on next step

            $x1 = $curX - 1;
            $y1 = $realFrom;
            $x2 = $curX;
            $y2 = $realTo;
            //we draw line finally with needed color
            imageline($img, $x1, $y1, $x2, $y2, $colors[$lineCol[$i]]);
        }

        //if the time looks like 235.000000, we need to draw vertical line
        if (round($time) == $time)
        {
            drawVerticalLine($img, $curX);
        }

        //we increase both curX (which is used for drawing) and overall x (it indicates how much lines we've processed)
        $curX++;
        $sumX++;

    }

    // if we didn't save all lines to .gifs, we need to save leftovers
    if ($curX > 0)
    {
        $img = cutRight($img, $curX);
        imagegif($img, $dir . $imgNum . ".gif");
        $imgNum++;
    }

    //saving numbers of pictures rendered
    file_put_contents($dir . "info.txt", ($imgNum - 1));

}

$fname = $_GET['file'];

//there should be no slashes in filename and it should end with .txt
if (strpos($fname, "/") !== false || strpos($fname, "\\") !== false || strpos($fname, ".txt") === false)
{
    echo "Security error!";
    die;
}

//it should exist
if (!file_exists($fname))
{
    echo "No such file!";
    die;
}

//if there are no images cached for our file, we need to generate them
if (!isCached($fname))
{
    generateImages($fname);
}

$page = 1;
$dirname = getCacheDirectory($fname);
$maxPages = file_get_contents($dirname . "info.txt");
//$maxPages = 10;
$uniqid = uniqid();
$img = $dirname . $page . ".gif?" . uniqid();

include("templates/show2.php.inc");



I'm just lost as to how I achive this line in the longer php script. I've tried creating my own function, and then calling it further down but this just breaks it. Any help is appreciated!!

I'm trying to get a bar graph from total number of hit on a month to month basis.

Everything works out find, except the bar graph is only showing 1 month, not everything that's being pulled out of the db.

Can anybody look and see what I'm doing wrong?

Code: [Select]
$userid = '44';
$t_month = date("Y-m-d h:i:s");
$y_month = date("Y-m-d h:i:s", strtotime("-1 Year"));

//Grabs Unique Visitors to App Page
$query = "SELECT CONCAT_WS(' ', YEAR(date), MONTHNAME(date)) AS RptDate, COUNT(DISTINCT referrer) 'referrer'
FROM app_analytics
WHERE appid = $userid
AND date BETWEEN '" .$y_month."'  AND  '" .$t_month."'
GROUP BY CONCAT_WS(' ', YEAR(date), MONTHNAME(date))
ORDER BY YEAR(date), MONTH(date)";

    $result = mysql_query($query) or die(mysql_error());       
        //$totals = array();
        while($row = mysql_fetch_array( $result )){
           
            $months = date("M", strtotime($row['RptDate']));
            $ip = $row['referrer']; 
             
           $values = array("$months" => $ip);
     
    $img_width=450;
$img_height=300;
$margins=20;

 
# ---- Find the size of graph by substracting the size of borders
$graph_width=$img_width - $margins * 2;
$graph_height=$img_height - $margins * 2;
$img=imagecreate($img_width,$img_height);

 
$bar_width=20;
$total_bars=count($values);
$gap= ($graph_width- $total_bars * $bar_width ) / ($total_bars +1);

 
# -------  Define Colors ----------------
$bar_color=imagecolorallocate($img,0,64,128);
$background_color=imagecolorallocate($img,240,240,255);
$border_color=imagecolorallocate($img,200,200,200);
$line_color=imagecolorallocate($img,220,220,220);
 
# ------ Create the border around the graph ------

imagefilledrectangle($img,1,1,$img_width-2,$img_height-2,$border_color);
imagefilledrectangle($img,$margins,$margins,$img_width-1-$margins,$img_height-1-$margins,$background_color);

 
# ------- Max value is required to adjust the scale -------
$max_value=max($values);
$ratio= $graph_height/$max_value;

 
# -------- Create scale and draw horizontal lines  --------
$horizontal_lines=20;
$horizontal_gap=$graph_height/$horizontal_lines;

for($i=1;$i<=$horizontal_lines;$i++){
$y=$img_height - $margins - $horizontal_gap * $i ;
imageline($img,$margins,$y,$img_width-$margins,$y,$line_color);
$v=intval($horizontal_gap * $i /$ratio);
imagestring($img,0,5,$y-5,$v,$bar_color);

}
 
 
# ----------- Draw the bars here ------
for($i=0;$i< $total_bars; $i++){
# ------ Extract key and value pair from the current pointer position
list($key,$value)=each($values);
$x1= $margins + $gap + $i * ($gap+$bar_width) ;
$x2= $x1 + $bar_width;
$y1=$margins +$graph_height- intval($value * $ratio) ;
$y2=$img_height-$margins;
imagestring($img,0,$x1+3,$y1-10,$value,$bar_color);
imagestring($img,0,$x1+3,$img_height-15,$key,$bar_color);
imagefilledrectangle($img,$x1,$y1,$x2,$y2,$bar_color);
}
 
header("Content-type:image/png");
imagepng($img);
 } 

Thanks in advance

hi, I hope some one can be of help?

I want to make a graph using php and GD with data from MySQL, so far success. Now I want to ammend the script (see end of message) to display text on each bar, e.g red, green, blue.

Also currently I loop through when setting the bar colours, in this case grey, how can I get it so there are 3 different colours? There will only ever be 3 bars.

Thank you for any  help

Gary

Code: [Select]
<?php
$dbhost = 'host';
$dbuser = 'user';
$dbpass = 'password';
$dbname = 'db';
$tblname = 'tbl';

$conn = mysql_connect($dbhost, $dbuser, $dbpass) or die ('Error connecting to mysql');

mysql_select_db($dbname);

// Make a MySQL Connection
$query = sql goes here!
$result = mysql_query($query) or die(mysql_error());
$values = array();
// Print out result
while($row = mysql_fetch_array($result)){   
array_push($values,$row['COUNT(Answer)']);}





// This array of values is just here for the example.
 


    //$values = array("5","6","7");
 
// Get the total number of columns we are going to plot
 
    $columns  = count($values);
 
// Get the height and width of the final image
 
    $width = 150;
    $height = 200;
 
// Set the amount of space between each column
 
    $padding = 15;
 
// Get the width of 1 column
 
    $column_width = $width / $columns ;
 
// Generate the image variables
 
    $im        = imagecreate($width,$height);
    $gray      = imagecolorallocate ($im,0xcc,0xcc,0xcc);
    $gray_lite = imagecolorallocate ($im,0xee,0xee,0xee);
    $gray_dark = imagecolorallocate ($im,0x7f,0x7f,0x7f);
    $white     = imagecolorallocate ($im,0xff,0xff,0xff);

 
// Fill in the background of the image
 
    imagefilledrectangle($im,0,0,$width,$height,$white);
 
    $maxv = 0;
 
// Calculate the maximum value we are going to plot
 
    for($i=0;$i<$columns;$i++)$maxv = max($values[$i],$maxv);
 
// Now plot each column
 
    for($i=0;$i<$columns;$i++)
    {
        $column_height = ($height / 100) * (( $values[$i] / $maxv) *100);
 
        $x1 = $i*$column_width;
        $y1 = $height-$column_height;
        $x2 = (($i+1)*$column_width)-$padding;
        $y2 = $height;
 
        imagefilledrectangle($im,$x1,$y1,$x2,$y2,$gray);
// imagefilledrectangle($im,$x1,$y1,$x2,$y2,$colour[$i]);
 
// This part is just for 3D effect
 
        imageline($im,$x1,$y1,$x1,$y2,$gray_lite);
        imageline($im,$x1,$y2,$x2,$y2,$gray_lite);
        imageline($im,$x2,$y1,$x2,$y2,$gray_dark);
 
    }
 
// Send the PNG header information. Replace for JPEG or GIF or whatever
 
    header ("Content-type: image/png");
    imagepng($im);

?>

I need a simple line graph for my PHP site showing page views against date (monthly). Have tried to find plugins but can't find an appropriate one. Can someone please help with a script or direct me to a plugin.

Attached is the kind of graph I'd like to have.

Following Sams PHP 24hrs... Rewrote Example and it isn't working... I am not getting any syntax error just an error saying it cannot display the graph because there are errors in the image.  I have went through it line for line looking for mispellings you name it making sure it was exactly as they wrote so I could follow along... but now its is not working and I believe its me.. not the book... can anyone help me out?

<?php
//Send content type header to browser so image will be rendered
header ("Content-type: image/png");

class SimpleBar
{
   private $xgutter = 20;//left/right margin
   
   private $ygutter = 20;//top/bottom margin
   
   private $bottomspace = 30;//gap at the bottom
   
   private $internalgap = 10;//gap between bars
   
   private $cells = array();//labels/amounts for bar charts
   
   private $totalwidth;
   
   private $totalheight;
   
   private $font;
   

   function __construct( $width, $height, $font )
   {
      $this->totalwidth = $width;
      $this->totalheight = $height;
      $this->font = $font;
   }
   
   //Used to allow user to populate $cells[] property array
   function addBar( $label, $amount )
   {
      $this->cells[ $label ] = $amount;
   }
   
   private function _getTextSize( $cellwidth )
   {
      $textsize = (int)( $this->bottomspace );//Make $textsize equal to bottomspace
      if ( $cellwidth < 10 )
      {
         $cellwidth = 10;
      }
      //Loop through the cells array and acquire dimension info for the labels using imageTTfbBox()
      foreach ( $this->cells as $key=>$val )
      {
         while ( true )
         {
            $box = imageTTFbBox( $textsize, 0, $this->font, $key  );
            $textwidth = abs ( $box[2] );
            if ( $textwidth < $cellwidth )
            {
               break;
            }
            $textsize--;
         }
      }
      return $textsize;
   }
   
   function draw()
   {
      $image = imagecreate( $this->totalwidth, $this->totalheight );//Create Image Resource
      //Create Color resources
      $red = imagecolorallocate( $image, 255,0,0 );//Red
      $blue = imagecolorallocate( $image, 0,0,255 );//Blue
      $black = imagecolorallocate( $image, 0,0,0 );//Black
      
      $max = max( $this->cells );//Cache the maxium value the $cells[] array has
      
      $total = count( $this->cells );//Cache the number of elements the $cells[] array contains
      
      $graphCanX = ( $this->totalwidth - $this->xgutter*2 );//Set up the canvas space on the X-axis for the graph
      
      $graphCanY = ( $this->totalheight - $this->ygutter*2 -  $this->bottomspace );//Set up the canvas space on the Y-axis for the graph ( Have to allow room for our labels and margins )
      
      $posX = $this->xgutter;//Store the starting point for drawing our bars on the X-axis
      
      $posY = $this->totalheight - $this->ygutter; - $this->bottomspace;//Store the starting point for drawing our bars on the Y-axis ( Have to allow room for our labels and margins )
      
      $cellwidth = (int) ( ( $graphCanX -( $this->internalgap * ( $total - 1 ) ) ) / $total );//Calculate the cellwidth for each bar by taking the width of the graph canvas and subtracting the total distance bewteen the bars divided by the total amount of bars being used
      
      $textsize = $this->_getTextSize( $cellwidth );
      
      foreach( $this->cells as $key=>$val )
      {
         $cellheight = (int) ( ( $val/$max ) * $graphCanY );//Calculate height of each bars
         
         $center = (int) ( $posX + ($cellwidth/2) );//Calculate cener point of bars
         
         $imagefilledrectangle( $image, $posX, ($posY - $cellheight), ($posX+$cellwidth), $posY, $blue);//Draw the bars
         
         $box = imageTTFbBox( $textsize, 0, $this->font, $key );
         
         $tw = $box[2];
         
         imageTTFtext( $image, $textsize, 0, ($center-($tw/2) ),
         ( $this->totalheight-$this->ygutter), $black, $this->font, $key );
         $posX += ( $cellwidth + $this->internalgap);
      }
   
      imagepng( $image );   
   }
   
}

$graph = new SimpleBar( 500, 300, "league_gothic-webfont.ttf" );
$graph->addBar("Really Liked" , 200);
$graph->addBar("Liked" , 100);
$graph->addBar("Kinda Like" , 300);

$graph->draw();



?>

For the life of me, I cannot find a way to delete, cancel or remove facebook events I created & updated using the FB PHP SDK & the Graph API.

I've tried every single permutation found on facebook's documentation & stack overflow...

Here are some of the clues I have found on my quest..

https://developers.facebook.com/docs/reference/api/#deleting https://developers.facebook.com/docs/reference/api/event/ https://developers.facebook.com/docs/reference/rest/events.cancel/
http://stackoverflow.com/questions/2931387/facebook-sdk-and-graph-api-comment-deleting-error
http://stackoverflow.com/questions/2858748/facebook-api-delete-status
http://stackoverflow.com/questions/3832405/facebook-graph-api-delete-like

Here is what I have tried so far.
function delete_fb_event($event_data, $data)
{
    //load the user for offline access and userid
    $user = $this->load_user($data['aid']);

    if(!empty($user[0]['fb_offline_access']))
    {
        //instantiate Facebook API
        require 'facebook.php';
        $facebook = new Facebook(array(
          'appId'  => 'BLAHBLAHBLAH',
          'secret' => 'BLAHBLAHBLAHBLAHBLAHBLAH',
          'cookie' => true,
        ));

        $fb_event = array(
            "access_token" => $user[0]['fb_offline_access'],
        );

        $result = $facebook->api('/'.$event_data['fb_event_id'], 'DELETE', $fb_event); //Uncaught GraphMethodException: Unsupported delete request
        //$result = $facebook->api('/'.$user[0]['fb_id']."_".$event_data['fb_event_id'], 'POST', array('access_token' => $user[0]['fb_offline_access'], 'method' => 'delete')); Uncaught OAuthException: (#803) Some of the aliases you requested do not exist
        //$result = $facebook->api('/'.$event_data['fb_event_id']."_".$user[0]['fb_id'], 'POST', array('access_token' => $user[0]['fb_offline_access'], 'method' => 'delete')); Uncaught OAuthException: (#803) Some of the aliases you requested do not exist  
        //$result = $facebook->api('/'.$event_data['fb_event_id'], 'POST', array('access_token' => $user[0]['fb_offline_access'], 'method' => 'delete')); Uncaught GraphMethodException: Unsupported post request
        //$result = $facebook->api('/'.$user[0]['fb_id']."_".$event_data['fb_event_id'], 'POST', array( 'access_token' => $user[0]['fb_offline_access'], 'method' => 'delete' )); Uncaught OAuthException: (#803) Some of the aliases you requested do not exist
        return $result;         
    }
    else
    {
        echo "error3"; //no FB offline access
    }       
}   

Hello people, currently i ran into some problem.

Currently, i have a database called responses which have the fields of ID, Student_id, question_id, Answer.

I had stored my results into the database which appeared to be           1       1                  1             Agree
                                                                                                                 2       1                  2            Disagree
                                                                                                                 3        3                 4             Unsatisfied.

So any recommendation on how should i do about in generating the result into a graph whereby the graph will show how many students choose "AGree" on that particular question THANKS

I have the following code:

Code: [Select]
private function buildJSResponse(){
$data = "";
$i = 0;
$arr = array();
while($this->db->row()){
$arr[] = (int)$this->db->field("average");
}
$this->max = max($arr);
$this->min = min($arr);
$this->mid = round(($this->max + $this->min) / 2);
foreach($arr as $val){
$nTime = ($val / $this->max) * 100;
$data .= "data[$i] = ".$nTime.";";
$i++;
}
return $data;
}
It takes an array, finds the max/min and number halfway between the min/max.
The next part I am not sure what to do.

I am making a line graph using the canvas, so I am building a javascript array, which will contain the point on the chart. The problem I am having, is location.
Lets say $max = 110, and $min = 95.
the y position on the graph should be 0 for $max, and 100 for $min, then all the other points need to fall into their place as well.

$nTime is supposed to do that, but it doesn't any suggestions?

The attachment is the result I am getting from my above code.
As you can see the lowest number is 49, so the value with 49 should touch the bottom, which it doesn't.

Hello,

I am using a tutorial script for generating a basic bar graph. I have attempted to convert this script into an object-oriented script. However, upon attempting to define the graph, it is not successfully generated. Here is my code:

Code: [Select]
<?

class Graph
{
var $values;
var $image;
var $image_width = 450;
var $image_height = 300;
var $margin = 20;
var $bar_size = 20;
var $horizontal_lines = 20;

var $bar_colour;
var $border_colour;
var $background_colour;
var $line_colour;

function CreateGraph()
{
$this->image = imagecreate($this->image_width, $this->image_height);
}

function SetSize($width, $height)
{
$this->image_width = $width;
        $this->image_height = $height;
        }
       
        function SetMargin($size)
        {
        $this->margin = $size;
        }
       
        function SetBarSize($size)
        {
        $this->bar_size = $size;
        }
       
        function SetHorLines($size)
        {
        $this->horizontal_lines = $size;
        }
       
        function HexConvert($rgb)
        {
    return array(
        base_convert(substr($rgb, 0, 2), 16, 10),
        base_convert(substr($rgb, 2, 2), 16, 10),
        base_convert(substr($rgb, 4, 2), 16, 10),
    );
}
       
        function SetColours($bars, $background, $border, $line)
        {
        // This is hex based, similar to CSS, it is converted by HexConvert
        $bars = $this->HexConvert($bars);
        $background= $this->HexConvert($background);
        $border= $this->HexConvert($border);
        $line = $this->HexConvert($line);
       
        $this->bar_colour = imagecolorallocate($this->image, $bars[0], $bars[1], $bars[2]);
        $this->background_colour = imagecolorallocate($this->image, $background[0], $background[1], $background[2]);
        $this->border_colour = imagecolorallocate($this->image, $border[0], $border[1], $border[2]);
        $this->line_colour =imagecolorallocate($this->image, $line [0], $line [1], $line [2]);
        }
       
        function DrawBorders()
        {
        imagefilledrectangle($this->image,1,1,$this->image_width-2,$this->image_height-2,$this->border_colour);
imagefilledrectangle($this->image,$this->margin,$this->margin,$this->image_width-1-$this->margin,$this->image_height-1-$this->margin,$this->background_colour);
}

function DrawHorLines($horizontal_gap, $ratio)
{
for($i=1;$i<=$this->horizontal_lines;$i++)
{
$y = $this->image_height - $this->margin - $horizontal_gap * $i ;
imageline($this->image, $this->margin, $y, $this->image_width - $this->margin, $y, $this->line_colour);
$v = intval($horizontal_gap * $i / $ratio);
imagestring($this->image, 0, 5, $y-5, $v, $this->bar_colour);
}
}

function DrawBars($graph_height, $gap, $ratio)
{
for($i=0;$i< $total_bars; $i++)
{
list($key,$value)=each($this->values);
$x1= $this->margin + $gap + $i * ($gap+$this->bar_size) ;
$x2= $x1 + $this->bar_size;
$y1 = $this->margin +$graph_height- intval($value * $ratio) ;
$y2 = $this->image_height-$this->margin;
imagestring($this->image,0,$x1+3,$y1-10,$value,$this->bar_colour);
imagestring($this->image,0,$x1+3,$this->image_height-15,$key,$this->bar_colour);
imagefilledrectangle($this->image,$x1,$y1,$x2,$y2,$this->bar_colour);
}
}
       
        function DrawGraph()
        {
        $graph_width=$this->image_width - $this->margin * 2;
$graph_height=$this->image_height - $this->margin * 2;

$total_bars  = count($values);
$gap = ($graph_width- $total_bars * $this->bar_width ) / ($total_bars +1);

$this->DrawBorders();

$max_value=max($values);
$ratio = $graph_height / $max_value;

$horizontal_gap = $graph_height / $horizontal_lines;

$this->DrawHorLines($horizontal_gap, $ratio);

$this->DrawBars($graph_height, $gap, $ratio);
}

function OutputGraph()
{
header("Content-type:image/png");
imagepng($this->image);
}
}

?>
I expect this to be my misunderstanding of how object orientated codes work. I'm also open to any suggestions for improvement.

Edit: Here is the script where I use the class.
Code: [Select]
<?
include "bargraph.class.php";

$graph = new Graph;
$graph->SetSize(450, 300);
$graph->CreateGraph();
$graph->SetMargin(20);
$graph->SetBarSize(20);
$graph->SetHorLines(20);
$graph->SetColours("FFFFFF", "C0C0C0", "000000", "000000");
$graph->DrawGraph();
$graph->OutputGraph();
?>

what im trying to do is take a youtube embed code find the URL code for that video and remove all other parts of the code keeping only the URL of the video
after i get the URL by it self then replace the http://www.youtube.com/ part of the URL with http://i2.ytimg.com/vi/

to do this i know that i need something like this to get the URL of the video
http://www.youtube.com/((?:v|cp)/[A-Za-z0-9\-_=]+)
but how to only return just the URL is something idk how to do

then use str_replace http://www.youtube.com/(?:v|cp)/" with  http://i2.ytimg.com/vi/

so in the end im asking if anyone know how to remove all other codes i dont want  and only keep the URL


this may have to be done using "regex" im not sure as i dont know to much about regex and what it can do but does sound like it would help lol

i have to read a single line from a csv,  its a really big file and i only need one column. i need the response to be a string ,i made a search and found the following code but i dont have any idea how to get a single line from a single string per run .

<?php
$row = 1;
//open the file
if (($handle = fopen("file.csv", "r")) !== FALSE)
{
    while (($data = fgetcsv($handle, 0, ",")) !== FALSE)
    {
        $num = count($data);
        echo "<p> $num fields in line $row: <br /></p>\n";
        $row++;
        for ($c=0; $c < $num; $c++)
        {
            echo $data[$c] . "<br />\n";
        }
    }
    fclose($handle);
}
?>

Edited by bores_escalovsk, 16 May 2014 - 06:38 PM.