PHP: var_dump while loop

Question

I was trying to create a loop for all the variables on a page to display in one while loop. I couldn't seem to get the variable to output. Here is the code I tried that made the most sense to me:

<?php
$varone = true;
$vartwo = 47;
$varthree = "A little string";

$vars = get_define_vars();

while($loop = $vars){
echo "variable ".$vars;
var_dump($vars;)
}
?>

It would crash one browser and the other it would stay blank. The reason I tried the code this way is because I thought of how I would word a mysql loop and I thought it would work in a similar way. Sorry if this is a newb question.

Tried to update to have a question.

Elijah Cruz
– Elijah Cruz

2018-01-18 19:17:13 +00:00
Commented Jan 18, 2018 at 19:17 — Elijah Cruz
– Elijah Cruz, Commented Jan 18, 2018 at 19:17
Blank page is parse error var_dump($vars;) <<<

AbraCadaver
– AbraCadaver

2018-01-18 19:22:30 +00:00
Commented Jan 18, 2018 at 19:22 — AbraCadaver
– AbraCadaver, Commented Jan 18, 2018 at 19:22

Nigel Ren · Accepted Answer · 2018-01-18 19:15:36Z

2

You should use something like a foreach() loop...

foreach ($vars  as $name => $var){
   echo "variable ".$name."=";
   var_dump($var);
}

answered Jan 18, 2018 at 19:15

Nigel Ren

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1 Comment

Elijah Cruz Over a year ago

This is exactly what I was looking for! Thank you!

sdexp · Accepted Answer · 2018-01-18 19:21:25Z

0

Alternatively, I think it might be easier to use an array for this.

$new_array[] = true;
$new_array[] = 47;
$new_array[] = "A little string";

$a=0;
while($new_array[$a]){
    echo "variable ".$a." = ";
    var_dump($new_array[$a]);
    $a++;
}

answered Jan 18, 2018 at 19:21

sdexp

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1 Comment

Elijah Cruz Over a year ago

Yes meanwhile that is true that using an array would work and be easier, I have them on a page that has different variables for different things.

AbraCadaver · Accepted Answer · 2018-01-18 19:23:59Z

0

The reason I tried the code this way is because I thought of how I would word a mysql loop and I thought it would work in a similar way.

Though I would go with foreach you can use your current code with list and each as many use to fetch from MySQL:

while(list($key, $val) = each($vars)){
    echo "variable $key";
    var_dump($val); //var_dump($vars;) PARSE ERROR check ;
}

However each is deprecated:

Warning This function has been DEPRECATED as of PHP 7.2.0. Relying on this function is highly discouraged.

edited Jan 18, 2018 at 19:23

answered Jan 18, 2018 at 19:18

AbraCadaver

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