在PHP中找出有关错误编写的变量或任何其他错误的问题？

Question

I had a code where a variable was written with "D" instead of "d", and it took me some time to figure out the code was not the problem, but how the variable was written. For example here : I had to use echo 'aa'; to find the wrong line :

$lastday = clone $firstDay;
$lastday->modify("last day of this month");
$offsetInit = $firstDay->format("w");
$offsetEnd = 6 - $lastday->format("w");
$firstDay->modify("-$offsetInit days" );
echo "aa";
$lastDay->modify("+$offsetEnd days"); //Day instead of day
echo " bb";
$initWeek = clone $firstDay;
$endWeek = clone $firstDay;
$endWeek->modify("+7 days");

Is there a way, a tool on Chrome or anything like this, to figure out were the issue can come from. I am using Netbeans and the variable was not highlighted.

Thanks

Answer 1

Just use an IDE like PhpStorm (or the free community edition). It will highlight common coding errors for you (e.g. unused variables will be highlighted etc.) which can help you spot these things. It will also autocomplete variable names, function names, etc. to reduce the chance of you making these errors in the first place.