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PHP for Loop


The for loop - Loops through a block of code a specified number of times.


The PHP for Loop

The for loop is used when you know how many times the script should run.

Syntax

for (expression1, expression2, expression3) {
  // code block
}

This is how it works:

  • expression1 is evaluated once
  • expression2 is evaluated before each iterarion
  • expression3 is evaluated after each iterarion

Example

Print the numbers from 0 to 10:

for ($x = 0; $x <= 10; $x++) {
  echo "The number is: $x <br>";
}
Try it Yourself »

Example Explained

  1. The first expression, $x = 0;, is evaluated once and sets a counter to 0.
  2. The second expression, $x <= 10;, is evaluated before each iteration, and the code block is only executed if this expression evaluates to true. In this example the expression is true as long as $x is less than, or equal to, 10.
  3. The third expression, $x++;, is evaluated after each iteration, and in this example, the expression increases the value of $x by one at each iteration.

The break Statement

With the break statement we can stop the loop even if the condition is still true:

Example

Stop the loop when $i is 3:

for ($x = 0; $x <= 10; $x++) {
  if ($i == 3) break;
  echo "The number is: $x <br>";
}
Try it Yourself »


The continue Statement

With the continue statement we can stop the current iteration, and continue with the next:

Example

Stop, and jump to the next iteration if $i is 3:

for ($x = 0; $x <= 10; $x++) {
  if ($x == 3) continue;
  echo "The number is: $x <br>";
}
Try it Yourself »

Step 10

This example counts to 100 by tens:

Example

for ($x = 0; $x <= 100; $x+=10) {
  echo "The number is: $x <br>";
}
Try it Yourself »

PHP Exercises

Test Yourself With Exercises

Exercise:

Create a loop that runs from 0 to 9.

 ($i = 0; $i < 10; ) {
  echo $i;
}

Start the Exercise