What are the potential pitfalls of splitting a search string and querying the database multiple times in PHP?

Splitting a search string and querying the database multiple times in PHP can lead to performance issues due to the increased number of database queries being executed. To solve this problem, you can concatenate the search terms into a single query using the SQL `LIKE` operator with wildcards to search for multiple terms in a single query. 

<?php
// Assume $searchString contains the search terms separated by spaces
$searchTerms = explode(" ", $searchString);

// Build the SQL query to search for all terms in the database
$sql = "SELECT * FROM table_name WHERE";
foreach($searchTerms as $term){
    $sql .= " column_name LIKE '%$term%' AND";
}
$sql = rtrim($sql, "AND"); // Remove the last unnecessary "AND"

// Execute the query and fetch the results
$result = mysqli_query($connection, $sql);
while($row = mysqli_fetch_assoc($result)){
    // Process the results
}
?>

Keywords

PHP search string database querying performance

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