Break statement with levels in PHP - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does the break statement do in PHP loops?

The break statement immediately stops the execution of the current loop and exits it.

intermediate

How does break with levels work in PHP?

You can specify a number after break to exit multiple nested loops at once. For example, break 2; exits two levels of loops.

beginner

What happens if you use break 1; in a nested loop?

Using break 1; exits only the innermost loop, which is the default behavior of break without a number.

intermediate

Can you use break with levels in switch statements in PHP?

Yes, break with levels works in both loops and switch statements. It exits the specified number of enclosing loop or switch structures.

intermediate

Example: What does this code output?<br>

for ($i = 1; $i <= 3; $i++) {
  for ($j = 1; $j <= 3; $j++) {
    if ($j == 2) {
      break 2;
    }
    echo "$i$j ";
  }
}

The output is 11 . When $j equals 2, break 2; exits both loops immediately, so only 11 is printed.

What does break 3; do inside three nested loops?

A Causes an error

B Exits only the innermost loop

C Exits all three loops immediately

D Exits the outermost loop only

break 3; exits three levels of loops, so it stops all three nested loops immediately.

What is the default level of break if no number is specified?

A 1

B 0

C 2

D It depends on the loop

By default, break exits only the innermost loop, which is level 1.

Can break 2; be used inside a single loop?

A Yes, it exits the loop twice

B No, it causes a warning or error

C Yes, it exits the loop once

D No, it does nothing

If you use break with a level greater than the number of nested loops, PHP will issue a warning.

Which statement is true about break in PHP?

A <code>break</code> can exit multiple nested loops with a number

B <code>break</code> can only exit one loop at a time

C <code>break</code> restarts the loop

D <code>break</code> only works in <code>switch</code> statements

break can exit multiple nested loops by specifying a number after it.

What will happen if you use break 0; in a loop?

A It does nothing

B It exits the loop immediately

C It behaves like <code>break 1;</code>

D It causes a fatal error

Using break 0; is invalid and causes a fatal error in PHP.

Explain how the break statement with levels works in PHP nested loops.

Think about how many loops you want to stop at once.

Describe a real-life situation where breaking out of multiple loops at once might be useful.

Imagine looking for something in a big table and stopping when found.