PHP continue statement

Question

When reading a PHP book I wanted to try my own (continue) example. I made the following code but it doesn't work although everything seems to be ok

$num2 = 1;

    while ($num2 < 19)
        {
            if ($num2 == 15) { 
            continue; 
            } else {
            echo "Continue at 15 (".$num2.").<br />";
            $num2++;
            }

        }

The output is

Continue at 15 (1).
Continue at 15 (2).
Continue at 15 (3).
Continue at 15 (4).
Continue at 15 (5).
Continue at 15 (6).
Continue at 15 (7).
Continue at 15 (8).
Continue at 15 (9).
Continue at 15 (10).
Continue at 15 (11).
Continue at 15 (12).
Continue at 15 (13).
Continue at 15 (14).

Fatal error: Maximum execution time of 30 seconds exceeded in /var/www/php/continueandbreak.php on line 20

Line 20 is that line

if ($num2 == 15) {

Would you please tell me what's wrong with my example ? I am sorry for such a Noob question

Marek Karbarz · Accepted Answer · 2009-11-13 03:08:50Z

10

if you don't increment $num2 before the continue you will get into an infinite loop;

$num2 = 0;

while ($num2 < 18)
    {
            $num2++;
            if ($num2 == 15) { 
              continue; 
            } else {
              echo "Continue at 15 (".$num2.").<br />";
            }


    }

edited Nov 13, 2009 at 3:08

answered Nov 13, 2009 at 2:59

Marek Karbarz

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1 Comment

Amber Over a year ago

Your code will still infinite loop; continue starts the next iteration of the loop without executing what comes after the if-else clause.

IAmKale · Accepted Answer · 2020-07-17 17:39:19Z

2

You don't even need continue there, your code equivalent to;

$num2 = 1;
while ($num2 < 19){
    if ($num2 != 15) { 
        echo "Continue at 15 (".$num2.").<br />";
        $num2++;
    }
}

If that's not what you're trying to achieve, you're using continue wrong.

edited Jul 17, 2020 at 17:39

IAmKale

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answered Nov 13, 2009 at 3:00

Jeffrey Aylesworth

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2 Comments

jheddings Over a year ago

This achieves the same result: an infinite loop that will eventually time out.

Mark Aroni Over a year ago

You definitely want to move $num2++; outside the if loop (below)

Marco · Accepted Answer · 2013-06-15 02:11:31Z

0

in php, use foreach for arrays and for for looping

for($num = 1; $num < 19; $num++) {
    if ($num != 15) { 
       echo "Continue at 15 (" . $num . ") . <br />";
       break;
    }   
}

answered Jun 15, 2013 at 2:11

Marco

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