Re: Is this a bug ??

> ti980246@binus.ac.id wrote: > > > hellow.. is 0 equal with null ?? > > i've written a code using strpos to get position of substring in a string.. here > > is my snippet.. > > $besar="Sam"; > > $posisi=strpos($besar,"S"); > > if ($posisi=="") {print("NULL");} > > if ($posisi==0) {print("first position");} > > > it runs the both if (it prints "NULL and "first position") > > the second if means that the substring is on first position in a string... but it > > is a null too.. is this a bug ?? or i've misunderstanding the php's variable > > concept ? > > > thank's > > As the manual states in the documentation of strpos(), you should use operator > === > (is equal and of same type) to make difference between the first position and > the > FALSE/null value. > > Thus (for PHP 4): > > <?php > $besar = "Sam"; > $posisi = strpos( $besar, "S" ); > if (!isset($posisi) || $posisi === FALSE) { > print "Not found."; > } else { > print "'S' found at $besar in position $posisi: > '$besar[$posisi]'\n"; > } > ?> Just to add, strpos() always returns something so the isset() will always be true. Therefore there is no need for it eg if ($posisi === FALSE) print "Not found"; else print "founded at $posisi" Well. It saves you 1 op! David.