Prepared statements and why they matter in PHP - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to prepare a SQL statement.

PHP

$stmt = $conn->[1]("SELECT * FROM users WHERE id = ?");

Drag options to blanks, or click blank then click option'

Aquery

Bprepare

Cexecute

Dfetch

Attempts:

3 left

💡 Hint

Common Mistakes

Using query() instead of prepare() causes no placeholder support.

Trying to execute() before preparing the statement.

The prepare method creates a prepared statement for execution.

2fill in blank

medium

Complete the code to bind a parameter to the prepared statement.

PHP

$stmt->[1]("i", $userId);

Drag options to blanks, or click blank then click option'

Aexecute

Bprepare

Cbind_param

Dfetch

Attempts:

3 left

💡 Hint

Common Mistakes

Calling execute() before binding parameters.

Using fetch() instead of bind_param().

The bind_param method binds variables to the parameter markers in the SQL statement.

3fill in blank

hard

Fix the error in executing the prepared statement.

PHP

$stmt->[1]();

Drag options to blanks, or click blank then click option'

Aexecute

Bprepare

Cbind_param

Dquery

Attempts:

3 left

💡 Hint

Common Mistakes

Calling prepare() again instead of execute().

Using query() which does not work with prepared statements.

The execute method runs the prepared statement after binding parameters.

4fill in blank

hard

Fill both blanks to fetch the result from the executed statement.

PHP

$stmt->[1]();
$stmt->[2]();

Drag options to blanks, or click blank then click option'

Astore_result

Bfetch

Cbind_result

Dexecute

Attempts:

3 left

💡 Hint

Common Mistakes

Trying to fetch before executing.

Not binding results before fetching data.

First, execute() runs the statement, then bind_result() binds variables to the columns in the result set.

5fill in blank

hard

Fill all three blanks to complete a safe prepared statement workflow.

PHP

$stmt = $conn->[1]("SELECT name FROM users WHERE id = ?");
$stmt->[2]("i", $id);
$stmt->[3]();

Drag options to blanks, or click blank then click option'

Aprepare

Bbind_param

Cexecute

Dquery

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up the order of prepare, bind_param, and execute.

Using query() instead of prepare().

The correct order is to prepare the statement, bind parameters, then execute it.