PHP PDO MySQL query LIKE -> multiple keywords

Question

I have a users table in MySQL and would like a search by name. Right now I have the following code:

Answer 1

Please check the below code.

<?php
$search = isset($_GET['q']) ? $_GET['q'] : '';
$search = strtoupper($search);
$search = strip_tags($search);
$search = trim($search);

$split_words = explode(" ", $search);

$query = "SELECT * FROM `users`";

if(count($split_words) > 0){
 $query .= " WHERE "
 for($i=0 ; $i < $split_words; $i++){
   $query .= " name LIKE ? OR ";
 }
 $query = substr($query , 0, -3); //Remove last 3 characters OR with space


 array_walk($split_words,"addPercentage");

 $query->execute($split_words);
}else{
 $query->execute();
}

$result = $query->rowCount();
echo $result;

function addPercentage(&$value,$key)
{
  $value = "%".$value."%" ;
}
?>

Answer 2

You shouldn't use @ to silence errors it is a bad practice, check if the value is set. The example below should work, but the results might not be all that relevant.

$search = isset($_GET['q']) ? $_GET['q'] : ''; 
$search = strtoupper($search);
$search = strip_tags($search); 
$search = trim($search);
$words = explode(' ', $search);
$words_condition = array();
$arguments = array();
foreach ($words as $word) {
    $words_condition[] = 'name LIKE ?';
    $arguments[] = '%'.$word.'%';
}

$query = $con->prepare('SELECT * FROM `users` WHERE '.implode(' OR ', $words_condition));
$query->execute($arguments);

$result = $query->rowCount();
echo $result;

Answer 3

$words = explode(" ", $search);

$i = 0;
while($words[i] != null)
{
    //Query where name LIKE words[i]
}