[RESOLVED] strpos()

[sssphp]

I'm finding a glitch in using strpos() to test whether a substring exists in a string, when the following is true:

$string = 'this is my string';
if ( strpos($string, 'this' )
{ echo "substring exists"; }
else
{ echo "substring doesn't exist"; }

Since strpos = 0 in this case (because 'this' starts at the 0th character of $string), the condition goes to false: 'substring doesn't exist'

Is this not the way to use strpos? Or must I code it like this:

if ( strpos($string, 'this' ) >= 0 )

[rincewind456]

If you check the manual it tells you exactly how to use it in these situations.

[sssphp]

So are you saying I need to code like this:

if ( strpos($string, 'this' ) !== FALSE )

[rincewind456]

No! I would do it like this

<?php
$string = 'this is my string';

$pos = strpos($string, 'this');

if ($pos === false) {
    echo "substring does not exists";
} else {
    echo "substring exist'";
    echo " and exists at position $pos";
}
?>

[sssphp]

Is that any different than this:

$string = 'this is my string';

if (strpos($string, 'this') === false) {
    echo "substring does not exist";
} else {
    echo "substring exists";
}

(I don't need the exact position; just want to know if it's there.)

[rincewind456]

No it does exactly the same thing.

[sssphp]

ok, thanx.