How to recognize opening page first time?

[movilogo]

I have a PHP page where there are some text boxes and a button.

When user fills the texts and click on submit button, the information is inerted to database table.

However, my problem is, when user just just navigates to the page, the page code gets executed and blank values are inserted in database table.

How I can ensure the PHP code runs only when user clicks the button not just when the page is refreshed.

My button defined as
<input type="submit" value="Add Information">

PHP codes are defined within
<?php ... ?>

However, I seemed to have no code to tell only execute PHP part when button is clicked.

Thanx 😕

[cahva]

Depending what is your form method of sending(GET or POST) you will use $POST or $GET. You can use [man]isset()[/man] to check whether there is actual content in your field.

if (isset($_POST['information']) AND !empty($_POST['information']))
{
    // Add content to database
}

That will check that there is something entered to information field.

If you want to check whether the actual button was clicked, give it a name attribute also and use that:

if (isset($_POST['submit']))
{
...

But its better to use the earlier because if you just hit enter in the text field, form submits but IE doesnt recognize the submit button.