如何从PHP生成的表单中获取值？

Question

I dont know where or how to use $_POST to get the values of the forms.

This is the whole code, I uploaded it on GitHub if you want to see the whole thing

This is the file I am trying to get the values out of.

new.php

<?php
if (!empty($_POST) and isset($_POST['actiune']))
{
$actiune = isset($_POST['actiune']) ? $_POST['actiune'] : NULL;
switch($actiune){
//CASE 1
case 'addElev': echo '<div class=dbFormText>Adauga elev</div><div 
class="databaseform"><form action="" method="post">
<input type="text" name="numeElev" placeholder="Nume elev"/>
<input type="text" name="orasElev" placeholder="Localitate"/>
<select name="sexElev">
<option value="Baiat">Baiat</option>
<option value="Fata">Fata</option></select>
<input type="text" name="tlfElev" placeholder="Nr. de telefon"/>
<input type="text" name="birthdayElev" placeholder="Nastere(DD-MM-YYYY)"/>
<input type="submit" value="Submit">
</form></div>';
break;
}
}
?>

This is the page of the first dropdown, which gives me the value of the switch

adminpanel.html

<div class="dropdowns">
<form action="" method="post">
<select name="actiune" onchange="this.form.submit()">
<option>Selecteaza actiunea</option>
<option value="addElev">Adauga elev</option>
<option value="addNota">Adauga nota</option>
<option value="addAbsenta">Adauga absenta</option>
<option value="addTeza">Adauga teza</option>
<option value="deleteElev">Sterge elev</option>
<option value="deleteNota">Sterge nota</option>
<option value="deleteAbsenta">Sterge absenta</option>
<option value="deleteTeza">Sterge teza</option>
<option value="modifyElev">Modifica elev</option>
<option value="modifyTeza">Modifica teza</option>
<option value="modifyPurtare">Modifica nota purtare</option>
</select>
<?php include('new.php') ?>
</div>

Answer 1

When you submit a form that has a method of post, e.g.

<form method="post">

(note: action="" is redundant and can be left out)

the target page (in this case, itself) will be provided with the $_POST array.

You can dump the entire array to look at the values by using:

if (!empty($_POST) and isset($_POST['actiune']))
{
var_dump($_POST);
}

This array should contain all the values from within the <form> tag, provided a name has been set (which will be used as the 'key' in the array).