Useful PHP Classes

- Here you can find some useful PHP classes that are free on the net, and helpful for PHP Web Developers, to create and add easily various elements in your web site.

JpGraph - Create Graph, Charts, Plots in PHP
- JpGraph, PHP library to create various type of Graph, charts and plots: lines, radar, bars, rings, pie and other types, with gradient colors and 3D vi
PhpSpreadsheet - Read, Write Excel and LibreOffice Calc files
- PhpSpreadsheet - Free PHP library with classes for reading and writing spreadsheet files: ODX, XLSX, XLS, CSV. Read /Write Excel and LibreOffice Calc
GraidleChart Create Graphic Charts
- GraidleChart, Free PHP graphing class, create graphic charts, horizontal or vertical bar, line, spider, pie graphs
parseCSV
- parseCSV, free PHP class to parse CSV data, read CSV file by conditions, store csv data in array
EasyPhpThumbnail Class
- EasyPhpThumbnail, free PHP class to handle image manipulation and create thumbnails for GIF, JPG and PNG
PHP Simple HTML DOM Parser
- PHP Simple HTML DOM, a HTML DOM parser class to manipulate HTML in a very easy way, just like jQuery
dompdf
- dompdf, HTML to PDF converter, create PDF files with PHP, convert HTML document to PDF
PHPMailer
- Free Email Transfer Class for PHP, supporting mail(), SMTP and POP3, HTML messages, attachments
Read Excel file data in PHP - PhpExcelReader
- PHP class, PhpExcelReader, to Read Excel file data, XSL and XSLS, without Microsoft Office
PDO_MySQLi class
- PHP class to connect to MySQL and perform easily and safe SQL queries, using PDO, or MySQLi

Daily Test with Code Example

HTML

CSS

JavaScript

PHP-MySQL

Which tag renders as emphasized text, displaying the text oblique?

<p>Web development courses: <em>CoursesWeb.net</em></p>

Which CSS property defines the space between the element border and its content?

margin padding position

h3 {
  padding: 2px 0.2em;
}

Click on the method which returns the first element that matches a specified group of selectors.

getElementsByName() querySelector() querySelectorAll()

// gets first Div with class="cls", and shows its content
var elm = document.querySelector("div.cls");
alert(elm.innerHTML);

Indicate the PHP variable that contains data from a form sent with method="post".

$_SESSION $_GET $_POST

if(isset($_POST["field"])) {
  echo $_POST["field"];
}

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