fix + pricefield

class/pricefield.php

+<?php
+
+class PriceField extends Field
+{
+    public function html() {
+        // Todo, if isset($_POST[$this->name]) && !$this->validate() => Show a error msg explanation for this line.
+        $html = '<div class="form-group">
+                    <label for="form'.$this->name.'">'.$this->label.'</label>
+                    <input type="number" class="form-control" name="'.$this->name.'" value="'.$this->value.'"> 
+                </div>';
+        return $html; 
+    }
+
+    public function validate()
+    {
+ 
+        if (isset($_POST[$this->name]))
+        {
+            $this->value = $_POST[$this->name];
+            if ($this->value > -1) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    public function show() {
+        $prix = $this->value;
+        $html = (string)$prix;
+        $html .= "€";
+        return $html;
+    }
+}