Forgot to add Extract_data.php sorry

Web/Extract_data.php

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+<!--Author : Camille RABIER-->
+<!--Extract data according to checkbox selected-->
+
+<!--https://stackoverflow.com/questions/49652894/export-csv-file-with-headers-from-postgresql-table-using-php-pdo-first-data-->
+<?php
+if (isset($_POST['ddl'])) {
+    require_once 'libphp/db_utils.php';
+    /*WARNING you need to have current*/
+    connect_db();
+    $query = "SELECT genome.id_genome, transcript.id_transcript";
+    if (isset($_POST['toddl'])){
+        $nr_fields = 0;
+        foreach ($_POST['toddl'] as $field){
+            $query.= ", $field";
+            $nr_fields +=1;
+        }
+        $query .= " FROM website.genome,website.transcript, website.annotate WHERE genome.id_genome = transcript.id_genome AND annotate.id_transcript = transcript.id_transcript AND validated=1";
+        $result = pg_query($db_conn, $query);
+        $filename = "Data_extraction$nr_fields.txt";
+        header('Content-type: application/csv');
+        header('Content-Disposition: attachment; filename=' . $filename);
+        header("Content-Transfer-Encoding: UTF-8");
+        $file = fopen($filename, "w");
+        while ($row = pg_fetch_assoc($result)) {
+            fputcsv($file, $row, ";");
+        }
+        fclose($file);
+        if (file_exists($filename)) {
+            header('Content-Description: File Transfer');
+            header('Content-Type: application/octet-stream');
+            header('Content-Disposition: attachment; filename="'.basename($filename).'"');
+            header('Expires: 0');
+            header('Cache-Control: must-revalidate');
+            header('Pragma: public');
+            header('Content-Length: ' . filesize($filename));
+            ob_clean(); /*TODO ???*/
+            flush();/*TODO ???*/
+            readfile($filename);
+            exit;
+        }
+    }
+}
+echo '<b>Which fields of the database you want to download:</b><br>
+<!--id_genome-->
+    <input type="checkbox" id="box1" name="toddl[]" value="species, strain">
+    <label for="box1"> Specie and strain </label>
+    <!--id_transcript-->
+    <input type="checkbox" id="box3" name="toddl[]" value="genetic_support">
+    <label for="box3"> Genetic support</label>
+    <input type="checkbox" id="box4" name="toddl[]" value="id_gene">
+    <label for="box3"> Gene ID</label><br>
+    <input type="checkbox" id="box4" name="toddl[]" value="locbeginning,locend">
+    <label for="box3"> Localisation of gene in genome</label>
+    <input type="checkbox" id="box4" name="toddl[]" value="strand">
+    <label for="box3"> Strand</label><br>   
+    <input type="checkbox" id="box4" name="toddl[]" value="gene_biotype,transcript_biotype">
+    <label for="box3"> Gene and transcript biotype</label>    
+    <input type="checkbox" id="box4" name="toddl[]" value="symbol">
+        <label for="box3"> Gene symbol</label>
+    <input type="checkbox" id="box4" name="toddl[]" value="description">
+    <label for="box4"> Function of protein </label>
+<button class="big_submit_button" name="ddl" type="submit" value="ddl"> Download</button>';
+
+