php - strpos issue with 0==false? -

i'm using strpos find position of string in string. first check if string found @ in there. here's line:

if (strpos($grafik['data'],$ss1)<>false && strpos($grafik['data'],$ss2)<>false && strpos($grafik['data'],$ss1) < strpos($grafik['data'],$ss2)) 

i check if both strings contained , want first 1 placed before second one. in php manual says strpos returns false when string not found. if string starts @ 0 position (strpos returns 0 since beginning), seems statement

strpos($grafik['data'],$ss1)<>false 

is false. somehow 0==false ? how make statement true when strpos returns 0 ?

from http://www.php.net/manual/en/function.strpos.php:

warning

this function may return boolean false, may return non-boolean value evaluates false, such 0 or "". please read section on booleans more information. use the === operator testing return value of function.

you have use === operator instead of ==.

in case, instead of using <>, use !==:

strpos($grafik['data'], $ss1) !== false 

this return true if $ss1 found in $grafik['data']