It seems that that you can not use the search_array function in PHP to search the 0 index AND have it evalute as true.
Consider this code for example:
$test=array(100, 101, 102, 103);
if($key=array_search(100,$test)){
echo $key;
}
else{
echo "Not found";
}
The needle '100' is found in the haystack and the key is returned as 0. So far so good, but then when I evaluate whether the search was successful or not it fails because the returned value is 0, equal to false!
The php manual suggests using '!==' but by doing so the key (array index) is not returned, instead either 1 or 0 is returned:
if($key=(array_search(103,$test)!== false)){
}
So how can I successfully search the array, find a match in the 0 index and have it evaluate as true?
Answer
This is explicitly mentioned in the docs. You need to use === or !==:
$key = array_search(...);
if ($key !== false) ...
Otherwise, when $key is 0, which evaluates to false when tested as a boolean.