if (stripos(strrev($file), "gpj.") === 0) {
echo $file; }
note the ===, 3 equals signs here is very important! check the docs for why.
== means 'equals', and === means 'is identical to'.
Seems like they would do the same thing when comparing '0' to 'the position in the string where that substr is found'. Why not?
0 can mean false in php:
$found = 0;
....
if (!$found) {
echo "File not found";
}
If a substr comparison matches at char 0:
$string = '12345';
$pos = substr($string, '1');
then without the '===' it would give the wrong result as $pos would be converted to false in this example.
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