How to Efficiently Fetch a Single Value from a Database Using PDO?

Fetching Single Row, Single Column with PDO

Question:

When executing a SQL query that selects a single column in a single row, how can we directly assign the result to a variable without using loops?

Query:

SELECT some_col_name FROM table_name WHERE user=:user

Failed Attempts:

The following attempts to fetch the result into a variable using fetchColumn() failed:

$col_value = $stmt->fetchColumn();
$col_value = $stmt->fetchColumn(0);

Answer:

It's essential to ensure that the query returns at least one row. To fetch a single value, the correct usage is $stmt->fetchColumn(). If the fetchColumn method is not working, it's likely that the query is returning no rows or that the :user parameter was not bound properly.

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