New Functions

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- PHP Manual
- Migrating from PHP 7.2.x to PHP 7.3.x
- New Functions

## New Functions

### PHP Core

- array_key_first()
- array_key_last()
- gc_status()
- hrtime()
- is_countable()
- net_get_interfaces()

### FastCGI Process Manager

- fpm_get_status()

### Date and Time

- DateTime::createFromImmutable()

### GNU Multiple Precision

- gmp_binomial()
- gmp_kronecker()
- gmp_lcm()
- gmp_perfect_power()

### Internationalization Functions

- Normalizer::getRawDecomposition()
- normalizer_get_raw_decomposition()
- Spoofchecker::setRestrictionLevel()

### Lightweight Directory Access Protocol

- ldap_add_ext()
- ldap_bind_ext()
- ldap_delete_ext()
- ldap_exop_refresh()
- ldap_mod_add_ext()
- ldap_mod_replace_ext()
- ldap_mod_del_ext()
- ldap_rename_ext()

### OpenSSL

- openssl_pkey_derive()

### Sockets

- socket_wsaprotocol_info_export()
- socket_wsaprotocol_info_import()
- socket_wsaprotocol_info_release()