When should you use the IN operator instead of OR in a SQL query in PHP?

The IN operator should be used instead of OR in a SQL query in PHP when you have a list of values to compare against a single column in a database table. Using the IN operator is more efficient and readable compared to using multiple OR conditions. 

// Using the IN operator instead of OR in a SQL query
$ids = [1, 2, 3, 4];

// Constructing the SQL query
$sql = "SELECT * FROM table_name WHERE id IN (".implode(",", $ids).")";

// Executing the query
$result = $conn->query($sql);

// Fetching the results
while($row = $result->fetch_assoc()) {
    // Process the results
}

Keywords

PHP SQL IN operator OR operator query

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