Conversion from decimal to binary

Question

Tell me, please, why the script does not display the result of the conversion from the decimal system to the binary. What is wrong here?

<?php $bin = '101'; function myBin2Dec($bin) { $n = strlen((string)$bin); for ($dec = 0, $i = 0; $i < n; $i++) { $dec = 2 * $dec + (int)$bin{$i}; } echo "=======\n<br>bin = ".$bin."; base = 10\n</br>=======</br>"; return $dec; } $result = myBin2Dec($bin); echo "result = ".$result."\n</br>"; ?>

ЬЬ_ ЬЬ_ 750 4 silver marks 10 bronze marks · Accepted Answer · 2012-12-03T14:58:50

It was

 for ($dec = 0, $i = 0; $i < n; $i++) {

It became

 for ($dec = 0, $i = 0; $i < $n; $i++) {

My interpreter cursed:

PHP Notice: Use of undefined constant n - assumed 'n' in / home / t / Documents / No name.php on line 27

Conversion from decimal to binary

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