PHP: How can I take an input from the user, store it, and display it back?

I've been trying to create some php code that would let me take input from a user using a text box. I want to then store that input (probably like 7 characters long) and then display it on a page in a list format ( eg 1 2 3 )

I've been at this for hours reading tutorials and what not but everything I find only shows me the fwrite function and when I try to append I still end up deleting data.

I would like the newest inputs to show up on top of the list if possible.

Can someone help me? I am really frustrated and I know almost no php.. kind of playing around with it and can't figure this out =/

I was thinking of storing the input from users in an array, then display the array.. But that开发者_JS百科 doesn't work for me either.

So you want to have a form, let the users enter text, then display all the text entered by all the users, sort of like a wall or guestbook.

I'm presuming you've managed to fetch the user's input by looking at $_POST after the form submission. To store it in a file without overwriting the existing file contents the easiest way is file_put_contents with the special FILE_APPEND flag.

Lets say your HTML form has a textbox with name="newData". Then, in the form submission target script:

//store all user input in a file called data.txt in the current directory
$filename = "./data.txt" ;
$newData = $_POST['newData'] . "\n" ;
file_put_contents($filename, $newData, FILE_APPEND);

//now fetch all data and display it
$lines = file($filename) ; 

echo '<ul>' ;

foreach ($lines as $line) {
    echo "<li>$line</li>" ;
}

echo '</ul>' ;

Get started like that to see the basics in action and then you can look into:

• filtering user input so that you don't store and display any nasty stuff
• storing the data file outside the web root so that it's not accessible via the browser
• prettifying the output list

If they're submitting the data via form, it will POST to the server; meaning you can use:

<form action="target.php" method="post">
     <input type="text" name="username" value="" />
     <input type="submit" name="submit value="Submit" />
</form>

for the markup, and then for the PHP (on target.php):

<?php 
    if (isset($_POST['submit']) { //to check if the form was submitted
        $username= $_POST['username'];
    } 
?>

At this point you can then use <?php echo $username ?> anywhere you want to echo the data entered from the previous page.

I'm no PHP expert either (I recommend the Lynda.com training videos, "PHP & MySQL Essential Training" and "PHP & MySQL Beyond The Basics" with Kevin Skoglund) but maybe this helps.

As said above, you can use $_POST to get the data, however it is worth noting that if you are actually using this in a web application, you need to sanitize for XSS. You can do this quite simply with PHP's htmlspecialchars()

try this for taking input from user in php

$variablname = fgets(STDIN); echo $variable;

file_put_contents('/path/to/file','contents',FILE_APPEND);