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# PLHashEntry
(plhashentry-syntax)=
## Syntax
```{code}
#include <plhash.h>
typedef struct PLHashEntry PLHashEntry;
```
(plhashentry-description)=
## Description
`PLHashEntry` is a structure that represents an entry in the hash
table. An entry has a key and a value, represented by the following
fields in the `PLHashEntry` structure.
```{code}
const void *key;
void *value;
```
The key field is a pointer to an opaque key. The value field is a
pointer to an opaque value. If the key of an entry is an integral value
that can fit into a `void *` pointer, you can just cast the key itself
to `void *` and store it in the key field. Similarly, if the value of
an entry is an integral value that can fit into a `void *` pointer,
you can cast the value itself to `void *` and store it in the value
field.
:::{warning}
**Warning**: There are other fields in the `PLHashEntry` structure
besides key and value. These fields are for use by the hash table
library functions and the user should not tamper with them.
:::