Strpos不起作用

Question

I need to see if the URL the user is currently on closely matches (So contains) the URL in the database. However strpos doesn't seem to be doing the job correctly.

This is the code i'm using

if(strpos($row['url'], $currenturl) === 0) {
    echo "YEAH!";
    return true;
}
echo "Current URL: ".$currenturl." Permission URL: ".$row['url']." Strpos ".strpos($row['url'], $currenturl)."<br>";

And this is the debug output.

Current URL: projects/projectview.php?whmcsid=0&id=4 Permission URL: projects/projectview.php?whmcsid=0 Strpos

So its not matching. Any ideas?

Answer 1

You have invalid order of arguments. strpos searches in haystack for a needle , so:

if(strpos($currenturl, $row['url']) === 0) {
    // code here
}

Answer 2

To get to know the substring is absent, you must use,

   ===FALSE

as 0 may also indicate the starting position of the substring.