Method has_index()
- Method has_index
int has_index(string haystack, int index)
int has_index(array haystack, int index)
int has_index(mapping|multiset|object|program haystack, mixed index)- Description
Search for index in haystack.
- Returns
Returns
1
if index is in the index domain of haystack, or0
(zero) if not found.This function is equivalent to (but sometimes faster than):
search(indices(haystack), index) != -1
- Note
A negative index in strings and arrays as recognized by the index operators
`[]()
and`[]=()
is not considered a proper index by has_index()- See also
has_value(), has_prefix(), has_suffix(), indices(), search(), values(), zero_type()