SCCI'15 - Devology - Session 9 - a quick revision on designing and developing.
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This document discusses various JavaScript and PHP techniques including changing HTML elements using JavaScript, displaying and hiding div elements with functions, form validation in JavaScript, connecting to a database with PHP using mysqli_connect, and performing basic SQL queries like SELECT, INSERT, UPDATE, and DELETE with PHP code examples.
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SCCI'15 - Devology - Session 9 - a quick revision on designing and developing.
- 3. Changing HTML Elements using JS <body> <p id=“SCCI">Seek the peak</p> </body>
- 4. Before
- 5. <body> <p id=“SCCI">Seek the peak</p> <script> document.getElementById(“SCCI").innerHTML = “Be your own hero"; </script> </body> Changing HTML Elements using JS
- 6. After
- 7. Pop up code function div_show() { document.getElementById(‘id').style.display = "block"; } function div_hide(){ document.getElementById(‘id').style.display = "none"; }
- 9. Validation in JS function check_empty() { if (document.getElementById('name').value == "" || document.getElementById('email').value == "" || document.getElementById('msg').value == "") { alert("Fill All Fields !"); } else { document.getElementById('form').submit(); alert("Form Submitted Successfully..."); } }
- 10. Validation in JS
- 11. Validation in JS
- 12. How to connect to a DATABASE? <?php $conn = mysqli_connect("localhost", "root", "", "devology"); if (!$conn) { die("Connection failed: " . mysqli_connect_error()); } ?>
- 13. SQL
- 14. SELECT * FROM Table_name; SELECT column1,2,3 FROM Table_name
- 15. <?php $sql = "SELECT id, user_name, email FROM teams"; $result = mysqli_query($conn, $sql); ?>
- 17. <?php $sql = "INSERT INTO teams(user_name, password, email, phone_number) VALUES (‘AssemSalem', 'Devology', ‘asemsalem@gmail.com‘, ‘01116877970')"; $result = mysqli_query($conn, $sql); ?>
- 18. UPDATE Tabel_name SET column1=‘value1’, column2=‘value2’ WHERE column3=‘value3’;
- 19. <?php $sql = "UPDATE teams SET user_name=‘MahmoudBahaa' WHERE password= 'Devology' "; $result = mysqli_query($conn, $sql); ?>
- 20. DELETE FROM Tabel_name WHERE some_column=‘some_column’;
- 21. <?php $sql = "DELETE FROM teams WHERE user_name= ‘AssemSalem' "; $result = mysqli_query($conn, $sql); ?>
- 22. Any Questions?
- 23. Thank you!