To generate a PDF with PHP, you can use a library like TCPDF, FPDF, or mpdf. These libraries provide a set of functions and methods to create PDF documents programmatically.

Here’s a basic example using TCPDF:

1. Download the TCPDF library from https://tcpdf.org/ and extract it to your project folder.

2. Create a PHP file and include the TCPDF library:

“`php
require_once(‘tcpdf/tcpdf.php’);
“`

3. Create a new TCPDF object:

“`php
$pdf = new TCPDF();
“`

4. Set the document properties:

“`php
$pdf->SetAuthor(‘Your Name’);
$pdf->SetTitle(‘PDF Example’);
“`

5. Add a page to the document:

“`php
$pdf->AddPage();
“`

6. Set the font and font size:

“`php
$pdf->SetFont(‘times’, ‘BI’, 20);
“`

7. Add some text:

“`php
$pdf->Cell(0, 10, ‘Hello, World!’, 0, 1);
“`

8. Output the PDF:

“`php
$pdf->Output(‘example.pdf’, ‘I’);
“`

The `Output` method takes two parameters: the first is the file name, and the second is the output destination. In this example, `I` indicates that the PDF will be displayed in the browser.

You can also use other methods provided by the TCPDF library to add images, tables, and other elements to your PDF document.

Similar steps can be followed for other PDF libraries like FPDF or mpdf, with minor differences in the API usage.