PHP: Updating double-quoted string inside a while loop

Question

I'm expecting this to print from "Count 1" to "Count 9". But the $str variable is not updating inside the while loop. It just prints "Count 1" nine times. In my use-case it's not possible to initiate $str inside the while loop therefore I'm looking for a dynamic update of the $str var inside the while loop.

    $p   = 1;
    $str = "Count {$p}";
    while ( $p < 10 ) {
        $p++;
        echo  $str . PHP_EOL;
    }

"In my use-case it's not possible to initiate $str inside the while loop" Please tell us more about your use case. If nothing else, how about doing a separate loop which initializes an array of strings, then use your while() loop to echo out those strings? — kmoser
– kmoser, Commented Mar 9, 2021 at 6:15
You could for example put a placeholder in $str, and then use sprintf to get that substituted with the current value of $p inside the loop … — C3roe
– C3roe, Commented Mar 9, 2021 at 7:50

kopz · Accepted Answer · 2021-03-09 06:11:07Z

2

You need to update your $str variable each loop.

$p = 1;

while ( $p < 10 ) {
    $str = "Count {$p}";
    echo  $str . PHP_EOL;
    $p++;
}

answered Mar 9, 2021 at 6:11

kopz

80413 silver badges25 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Raju Ahmed · Accepted Answer · 2021-03-09 07:16:29Z

0

As you mentioned you cant initiate $str inside your loop you can simply perform some concatenation to serve your purpose-

$p   = 1;
$str = "Count " ;
while ( $p < 10 ) {
    echo  $str . $p . PHP_EOL;
    $p++;
}

answered Mar 9, 2021 at 7:16

Raju Ahmed

3541 gold badge6 silver badges18 bronze badges

Collectives™ on Stack Overflow

PHP: Updating double-quoted string inside a while loop

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related