is_resource
bool is_resource(mixed value)
Tests whether a value is a resource pointer.
Returns:
TRUE if the value is a resource pointer; FALSE otherwise
Description:
is_resource() checks whether value is a resource pointer that has been returned by a call to fopen(), popen(), opendir(), etc., or one of the database functions such as mysql_connect(), msql_pconnect(), etc. If so, the function returns TRUE. If not, FALSE is returned.
Availability:
UNIX, Windows
Version:
3+, 4+
See also:
gettype()
Example:
Test whether a value is a resource pointer
$dir_handle = opendir ('..'); if (is_resource ($dir_handle)) print '$dir_handle is a resource pointer.'; else print '$dir_handle is not a resource pointer.'; |
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