Question

If I have an associative array that stores values from csv file like this:

$file_users = fopen("Users.csv", "r");
while (($record = fgetcsv($file_users, 1024, ',""')) !== FALSE){
        $users[]= array($record[0] => $record[2].$record[3]);
}

record[0], record[2] and record[3] are the values from the columns, row by row.

Then this is my way to search a value from the array and print the result:

for($i=0;$i<count($users);$i++){
foreach($users[$i] as $username_matricula => $username_fullname){
    if($username_matricula === $some_string){
        echo "Found: ".$some_string." and the result is: ".$username_fullname;
        }#end if
    }#end foreach
}#end for

And it throws me the following warning:

Warning:  Invalid argument supplied for foreach().

What am I doing wrong? Is there another way to find a string in assoc array?

Answer 1

perhaps this?

foreach((array)$users[$i] as $username_matricula => $username_fullname){

by adding (array) in front of the actual array you make it empty-safe. (no warnings)