Does variables' order matter when doing == and === comparisons? [duplicate]

Answer 1

Compare results from this to ifs.

 echo "Test '1abc' == 1 - ";
 if ('1abc' == 1) {
    echo 'ok';
 } else {
    echo 'fail';
 }

 echo "\nTest '1abc' === 1 - ";
 if ('1abc' === 1) {
    echo 'ok';
 } else {
    echo 'fail';
 }

Then read this page http://php.net/manual/en/language.types.type-juggling.php it's very interesting lecture ;)