在搜索之前如何隐藏所有sql表？

Question

In my code before searching its showing all user data. What I want is that only after pressing search option, will it show specific user data but before the search, I want to hide all the data. The picture below is my interface

Badly looking for assistance and thanks in advance.

Here is my code

<?php 
$db = new PDO('mysql:dbname=mypro_bms;host=localhost', 'root', '');
if (isset($_GET['q'])) {
  $q = $_GET['q'];
  $statement = $db->prepare("select * from donate where passport_IC like :passport_IC");
  $statement->execute([
    ':passport_IC' => '%' . $q .'%'

  ]);
} else {
  $statement = $db->prepare('select * from donate');
  $statement->execute();
}
$people = $statement->fetchAll(PDO::FETCH_OBJ);
 ?> 
  <table class="table table-bordered">
          <tr>
            <th><center> id</center></th>
            <th><center> Passport/IC</center></th>
            <th><center> Blood Group</center></th>
            <th><center> Blood Bag Type</center></th>
            <th><center>Donation Date</center></th>
            <th><center>Action</center></th>




          </tr>
          <?php foreach($people as $donors): ?>
            <tr>
               <td><center><b><font color="black"><?= $donors->id; ?></font></b></center></td>
               <td><center><b><font color="black"><?= $donors->passport_ic; ?></font></b></center></td>
               <td><center><b><font color="black"><?= $donors->blood_group; ?></font></b></center></td>
               <td><center><b><font color="black"><?= $donors->blood_bag; ?></font></b></center></td>
               <td><center><b><font color="black"><?= $donors->donate_date; ?></font></b></center></td>


            </tr>
          <?php endforeach; ?>

        </table>

Answer 1

You have to keep this part in seprate file and call this from ajax call.

Keep codes in File search.php

<table class="table table-bordered">
      <tr>
        <th><center> id</center></th>
        <th><center> Passport/IC</center></th>
        <th><center> Blood Group</center></th>
        <th><center> Blood Bag Type</center></th>
        <th><center>Donation Date</center></th>
        <th><center>Action</center></th>    
      </tr>
      <?php foreach($people as $donors): ?>
        <tr>
           <td><center><b><font color="black"><?= $donors->id; ?></font></b></center></td>
           <td><center><b><font color="black"><?= $donors->passport_ic; ?></font></b></center></td>
           <td><center><b><font color="black"><?= $donors->blood_group; ?></font></b></center></td>
           <td><center><b><font color="black"><?= $donors->blood_bag; ?></font></b></center></td>
           <td><center><b><font color="black"><?= $donors->donate_date; ?></font></b></center></td>    
        </tr>
      <?php endforeach; ?>    
    </table>

Keep codes in File fetchsearchresult.php

<?php 
$db = new PDO('mysql:dbname=mypro_bms;host=localhost', 'root', '');
if (isset($_GET['q'])) {
  $q = $_GET['q'];
  $statement = $db->prepare("select * from donate where passport_IC like :passport_IC");
  $statement->execute([
    ':passport_IC' => '%' . $q .'%'    
  ]);
} else {
  $statement = $db->prepare('select * from donate');
  $statement->execute();
}
$people = $statement->fetchAll(PDO::FETCH_OBJ);
// Here you have to pass the data($people) to search.php file
 ?> 

Now from search.php file, by clicking search button you have to call fetchsearchresult.php through ajax call to get the search result. After getting result you have bind that data in to search.php

Note: if $_GET['q'] variable didn't get value it'll fetch all detail from table.

Hope it helps

Answer 2

Since you don't want to show any data before the user makes a search, you need to remove the else-block:

<?php
$db = new PDO('mysql:dbname=mypro_bms;host=localhost', 'root', '');

// Default value for the $people array
$people = [];

// We're using empty() to make sure that the search string actually contains something.
if (!empty($_GET['q'])) {
    $statement = $db->prepare("select * from donate where passport_IC like :passport_IC");
    $statement->execute([
        ':passport_IC' => '%' . $_GET['q'] .'%'
    ]);

    // We moved this inside of the if-statements
    $people = $statement->fetchAll(PDO::FETCH_OBJ);
}
?>

<table class="table table-bordered">
    <tr>
        <th><center> id</center></th>
        <th><center> Passport/IC</center></th>
        <th><center> Blood Group</center></th>
        <th><center> Blood Bag Type</center></th>
        <th><center>Donation Date</center></th>
        <th><center>Action</center></th>
    </tr>

    <?php foreach($people as $donors): ?>
    <tr>
        <td><center><b><font color="black"><?= $donors->id; ?></font></b></center></td>
        <td><center><b><font color="black"><?= $donors->passport_ic; ?></font></b></center></td>
        <td><center><b><font color="black"><?= $donors->blood_group; ?></font></b></center></td>
        <td><center><b><font color="black"><?= $donors->blood_bag; ?></font></b></center></td>
        <td><center><b><font color="black"><?= $donors->donate_date; ?></font></b></center></td>
    </tr>
    <?php endforeach; ?>

</table>

This shouldn't give you any errors, since we've created a default value for $people and moved the fetchAll() to go inside of the if-statement.