STRPOS not working per W3S documentation

[mickeymouse]

Strpos documentation says "If a match is found, the function returns the character position of the first match. If no match is found, it will return FALSE."

My code:

$mystrpos=(strpos($row[3],$choice));

print("T161: choice=$choice  - position in row[3]=$mystrpos<br>");

Results:

When $choice is found, the print result shows the character position.  example: row[3]=BAC CAS,   T161: choice=BAC - position in row[3]=0

But, when not found, it does not return "FALSE"  It returns nothing - I can't even test it.  example: row[3]=BAC CAS,   T161: choice=Fam - position in row[3]=

 

[Ingolme]

The string representation of the boolean value false is an empty string.

You can use the strict equals operator === to test if it's false.

$mystrpos=(strpos($row[3],$choice));
if($mystrpos === false) {
    $mystrpos = "false";
}
print("T161: choice=$choice  - position in row[3]=$mystrpos<br>");