Variable issue with PHP

Question

I'm coding some PHP app and I'm receving some strange values from my code, example:

//Loop here lot of intval because i tried a lot of things
$testval=intval(intval($i/$dayspromo[$key])*$dayspromo[$key]);
echo "<br> val $testval counter $i bool<br>";
var_dump($i);
var_dump($testval);
var_dump($i-$testval);




 echo "<br> again val ".$testval." y ".$i-$testval." comp <br>";

will print at $i=9:

val 8 counter 9 bool
int(9) int(8) int(1) -8 comp

As you can see something very bad happened, if i try to subtract $testval from $i i will get wrong values but var_dump will show the RIGHT value. Also first part of the second echo is missing and i don't know why.

How do i fix or debug this to fix it?

Thanks in advance

ah sorry pasted old one, that's not part of the code i just tried to copy $testvar to $r and didn't work. — Motheus
– Motheus, Commented Sep 6, 2013 at 11:31

steven · Accepted Answer · 2013-09-06 11:42:51Z

1

please try this:

echo "<br> again val ".$testval." y ".($i-$testval)." comp <br>";

if you forget the brackets it will happen something like this:

$string = "hello world"; // you have a string

$tmp = $string - 10; // substract 10 from string
// string will be converted to int and this is zero
// zero minus 10 is -10

edited Sep 6, 2013 at 11:42

answered Sep 6, 2013 at 11:36

steven

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Motheus Over a year ago

oh yes my bad.... that leads me to another question for my code as $testval<$i will work only for $testval==$i. I think i will open a new question

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