item not in array php code example

Example 1: php value in array

in_array ( mixed $needle , array $haystack , bool $strict = false ) : bool

Example 2: php check if item in array

$allowedFileType = ['application/vnd.ms-excel','text/xls','text/xlsx','application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'];
  
if(in_array($_FILES["file"]["type"],$allowedFileType))