PHP - saving results from new array entry - PHP ?

[dejan99]

OBJECTIVE: When a visitor goes to index.php and clicks the enter button, it will add the input from "field1" into the $dAta array. AND, this is the most important, it will save the entries into the $dAta array.

CURRENT: This is the code that i have for now. When i type something into "field1" and click enter, i see the new entry into the array with the print_r. But when i exit and go back to open the index.php the added entry is not there.

THEORY: Any ideas??? Does this require the use of f.open, f.write. f.close? Im thinking something along the lines of scanning the existing array into a temporary array, add then entry from field 1, then write the new array to a new php file? Thanks.

---------CODE SECTION BELOW----------
<?php
$dAta = array(1 => "961204","961205","961206",);
?>

<FORM METHOD="POST" ACTION="index.php">
<input name="field1" type="text" size="80" value="">
<INPUT TYPE=submit VALUE="Enter">

<?php
$dAta[] = $_POST[field1];
print_r($dAta);
?>

[A!mee]

You actually would want to use a database for something like this, or if it is just a per user basis, a cookie.

PHP doesn't have built in memory without using one of these options. You could use the file functions, but those functions lock the text file so noone else can read/write to that text file until the lock is released. This isn't an issue for small apps that only one person is likely to use at a time, but for web apps that multiple users can be on concurrently, it becomes an issue. Even if the lock is only for a moment, as more users are on the site the likelihood of it being locked when someone else is trying to use it will increase.

[Langer]

You need to add your array to a session variable or some other permanent storage system, because PHP is without state. Additionally, you aren't really cuing the array to expand on post.

<?
session_start();
if(!isset($_SESSION['dAta'])) {
$_SESSION['dAta'] = array("961204","961205","961206");
}

if(isset($_POST['submit'])) {
$arr = $_SESSION['data'];
$arr[] = $_POST['field1'];
$_SESSION['dAta'] = $arr;
print_r($_SESSION['dAta'];
}
?>

<form method="post">
<input id="field1" name="field1" type="text" size="80" value="<? echo $_POST['field1']; ?>" />
<input type="submit" id="submit" name="submit" value="ENTER" />
</form>

Anyplace you want to use the session variable, make sure you have session_start() at the top of that page.