My code is extremely simple, but I have no idea what I've done to cause this error.
Notice: Undefined index: value in C:\xampp\htdocs\index.php on line 8
<form name="shuffle" action="" method="POST">
<input type="text" name="value">
<input type="submit" value="Shuffle">
</form>
PHP code: echo str_shuffle($_POST['value']);
You have posted form in same file. so you need to check if form is submitted or not.
Try like this:
if ( $_SERVER['REQUEST_METHOD'] == 'POST' ) {
echo str_shuffle($_POST['value']);
}
If you call $_POST['value'] when form has not been previously submitted you get a warning that the key of $_POST is not defined.
Try to define the variable anyway. So that if you have sent the form, take the value of the field, otherwise the value is FALSE
$value = isset($_POST['value']) ? $_POST['value'] : FALSE; //$value is always defined
if($value !== FALSE){
//something like
echo str_shuffle($value);
}
if(isset($_POST)){ echo str_shuffle($_POST['value']); }