Adding Image and Pie chat to PDF file by FPDF

<?php  
require('fpdf.php');  

$pdf = new FPDF();  
$pdf->AddPage();  
$pdf->Image('images/pdf-header.jpg', 0, 0);  
$pdf->Output();  
?>

<?php  
require('fpdf.php');  

$pdf = new FPDF();  
$pdf->AddPage();  
$pdf->Image('images/pdf-header.jpg',20, 60, 180,20,'JPG','www.plus2net.com');
$pdf->Output();  
?>

Adding image at header and footer

<?php  
require('fpdf.php');  

class PDF extends FPDF  
{  
    // Page header  
    function Header()  
    {  
        $this->Image('images/pdf-header.jpg', 0, 0);  
    }  

    // Page footer  
    function Footer()  
    {  
        $this->SetY(-20);  
        $this->Image('images/pdf-footer.jpg');  
    }  
}  

// Instanciation of inherited class  
$pdf = new PDF();  
$pdf->SetMargins(10, 60, 10);  
$pdf->AliasNbPages();  
$pdf->AddPage();  
$pdf->SetFont('Times', '', 12);  

for($i=1; $i<=40; $i++)  
    $pdf->Cell(0, 10, 'This is line number ' . $i, 0, 1);  

$pdf->Output();  
?>

Example: Inserting Multiple Images in a PDF

require('fpdf.php');  

$pdf = new FPDF();  
$pdf->AddPage();  
$pdf->Image('image1.jpg', 10, 10, 40);  
$pdf->Image('image2.png', 60, 10, 40);  
$pdf->Output();

Example: Resizing Image Dynamically

require('fpdf.php');  

$pdf = new FPDF();  
$pdf->AddPage();  

list($width, $height) = getimagesize('image.jpg');  

$pdf->Image('image.jpg', 10, 10, $width / 4, $height / 4);  // Resizing  

$pdf->Output();

Creating a Pie Chart and Embedding It in a PDF Using PHP

In this example, we generate a pie chart using PHP's GD library and embed it into a PDF using FPDF. This is useful for dynamic report generation, allowing users to visualize data in a structured PDF format.

<?php
require('fpdf.php');

// Function to create a pie chart using GD
function create_pie_chart($filename) {
    $width = 300;
    $height = 300;
    $image = imagecreate($width, $height);
    
    // Colors
    $white = imagecolorallocate($image, 255, 255, 255);
    $colors = [
        imagecolorallocate($image, 255, 0, 0),   // Red
        imagecolorallocate($image, 0, 255, 0),   // Green
        imagecolorallocate($image, 0, 0, 255),   // Blue
        imagecolorallocate($image, 255, 255, 0)   // Yellow
    ];
    
    // Sample data for the pie chart
    $data = [10, 10, 25, 25]; 

    $my_sum = array_sum($data); // Calculate sum of data values
    $start_angle = 0;
    $center_x = $width / 2;
    $center_y = $height / 2;
    $radius = 100;
    
    // Draw Pie Chart
    foreach ($data as $index => $value) {
        $end_angle = $start_angle + ($value * 360 / $my_sum);
        imagefilledarc($image, $center_x, $center_y, $radius * 2, $radius * 2, 
            $start_angle, $end_angle, $colors[$index], IMG_ARC_PIE);
        $start_angle = $end_angle;
    }
    
    // Save image as PNG
    imagepng($image, $filename);
    imagedestroy($image);
}

// Generate Pie Chart Image
$chart_file = "pie_chart.png";
create_pie_chart($chart_file);

// Create PDF and insert Pie Chart
$pdf = new FPDF();
$pdf->AddPage();
$pdf->SetFont('Arial', 'B', 16);
$pdf->Cell(0, 10, "Pie Chart Example in FPDF", 0, 1, 'C');
$pdf->Image($chart_file, 50, 40, 100, 100);

// Output PDF
$pdf->Output();

// Delete temporary image
unlink($chart_file);
?>

Code Explanation

• Pie Chart Generation: The script creates a pie chart using the GD library, assigns colors, and calculates segment angles.
• Saving the Chart: The generated pie chart is stored as a PNG file.
• Embedding in PDF: The FPDF library is used to create a PDF file, insert the pie chart, and format the document.
• Final Output: The generated PDF is displayed in the browser, and the temporary pie chart image is deleted.

Generating a Bar Chart in PHP and Embedding it in a PDF

This PHP script dynamically generates a bar chart using the GD library and saves it as an image file. The generated chart is then embedded into a PDF document using the FPDF library. Once the PDF is generated, the temporary image file is deleted. This ensures efficient memory usage while keeping the process dynamic.

<?php
require('fpdf.php');

// Function to create a Bar chart using GD
function create_bar_chat($filename) {
    // Set the image width and height
    $width = 400; 
    $height = 300;
    $image = imagecreate($width, $height);

    // Define colors
    $white = imagecolorallocate($image, 255, 255, 255); 
    $black = imagecolorallocate($image, 0, 0, 0);  
    $blue = imagecolorallocate($image, 0, 102, 204);  

    // Sample Data
    $data = [50, 80, 120, 60, 90];  
    $bar_width = 40;
    $gap = 20; // Gap between bars  
    $base = $height - 30;

    // Draw axes
    imageline($image, 40, 10, 40, $base, $black);  
    imageline($image, 40, $base, $width - 10, $base, $black);  

    // Draw bars
    $x = 50;
    foreach ($data as $value) {
        imagefilledrectangle($image, $x, $base - $value, $x + $bar_width, $base, $blue);
        imagestring($image, 4, $x + 10, $base - $value - 15, $value, $black);
        $x += $bar_width + $gap;
    }

    // Output the image
    imagepng($image, $filename);
    imagedestroy($image);
}

// Generate Bar Chart Image
$chart_file = "bar_chart.png";
create_bar_chat($chart_file);

// Create PDF and insert Bar Chart
$pdf = new FPDF();
$pdf->AddPage();
$pdf->SetFont('Arial', 'B', 16);
$pdf->Cell(0, 10, "Bar Chart Example in FPDF", 0, 1, 'C');
$pdf->Image($chart_file, 50, 40, 100, 100);

// Output PDF
$pdf->Output();

// Delete temporary image
unlink($chart_file);
?>

Code Explanation:

• require('fpdf.php'): Includes the FPDF library for PDF generation.
• function create_bar_chat($filename): Defines a function to create the bar chart and save it as an image.
• $image = imagecreate($width, $height): Creates an empty image canvas.
• imagecolorallocate: Defines colors for background, bars, and axes.
• $data = [50, 80, 120, 60, 90]: An array containing sample values for the bars.
• imagefilledrectangle: Draws the bars dynamically based on the provided data.
• imagepng($image, $filename): Saves the generated image as a PNG file.
• imagedestroy($image): Frees up memory by destroying the image resource.
• $pdf = new FPDF(): Creates a new PDF document.
• $pdf->AddPage(): Adds a new page to the PDF.
• $pdf->Image($chart_file, 50, 40, 100, 100): Embeds the generated chart image into the PDF.
• $pdf->Output(): Generates and outputs the final PDF document.
• unlink($chart_file): Deletes the temporary bar chart image after the PDF is created.

This method is useful for dynamic reporting and data visualization, allowing easy PDF export of statistical graphics.

Questions