Question

I am learning php and html.

I am trying to make a function run when a submit button is pressed. Then I want it to edit a text field on my form with the variable from that function. Without going to a new page…like a self refresh.

How do I do this? Thanks.

I think I have seen how to do this with JavaScript getelementbyID. But I need to do it via php.

Perhaps an easy way to explain it is this: When button is pressed it generates a password in a text field automatically.

The function I am using:

<?
function genkey($length){
    $key = '';
    list($usec, $sec) = explode(' ', microtime());
    mt_srand((float) $sec + ((float) $usec * 100000));

    $possibleinputs = array_merge(range('z','a'),range(0,9),range('A','Z'));

    for($i=0; $i<$length; $i++) {
        $key .= $possibleinputs{mt_rand(0,61)}; }
    return $key;
}
?>

Answer 1

like this:

//    index.php
<?php
function genkey($length){
    $key = '';
list($usec, $sec) = explode(' ', microtime());
mt_srand((float) $sec + ((float) $usec * 100000));

$possibleinputs = array_merge(range('z','a'),range(0,9),range('A','Z'));

for($i=0; $i<$length; $i++) {
    $key .= $possibleinputs{mt_rand(0,61)}; }
return $key;
}

$data = array();
if( !empty($_POST['variable']) ) {
    $data['variable'] = genkey( strlen($_POST['variable']) );
} else {
    $data['variable'] = '';
}
?>
//...HTML...
<form action="" method="POST">
<input name="variable" value="<?=$data['variable']?>">
<input type="submit" value="toPHP">
</form>
//...HTML...