New global constants

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- PHP Manual
- Migrating from PHP 7.0.x to PHP 7.1.x
- New global constants

## New global constants

### Core Predefined Constants

- `PHP_FD_SETSIZE`

### CURL

- `CURLMOPT_PUSHFUNCTION`
- `CURL_PUSH_OK`
- `CURL_PUSH_DENY`

### Data Filtering

- `FILTER_FLAG_EMAIL_UNICODE`

### Image Processing and GD

- `IMAGETYPE_WEBP`

### JSON

- `JSON_UNESCAPED_LINE_TERMINATORS`

### LDAP

- `LDAP_OPT_X_SASL_NOCANON`
- `LDAP_OPT_X_SASL_USERNAME`
- `LDAP_OPT_X_TLS_CACERTDIR`
- `LDAP_OPT_X_TLS_CACERTFILE`
- `LDAP_OPT_X_TLS_CERTFILE`
- `LDAP_OPT_X_TLS_CIPHER_SUITE`
- `LDAP_OPT_X_TLS_KEYFILE`
- `LDAP_OPT_X_TLS_RANDOM_FILE`
- `LDAP_OPT_X_TLS_CRLCHECK`
- `LDAP_OPT_X_TLS_CRL_NONE`
- `LDAP_OPT_X_TLS_CRL_PEER`
- `LDAP_OPT_X_TLS_CRL_ALL`
- `LDAP_OPT_X_TLS_DHFILE`
- `LDAP_OPT_X_TLS_CRLFILE`
- `LDAP_OPT_X_TLS_PROTOCOL_MIN`
- `LDAP_OPT_X_TLS_PROTOCOL_SSL2`
- `LDAP_OPT_X_TLS_PROTOCOL_SSL3`
- `LDAP_OPT_X_TLS_PROTOCOL_TLS1_0`
- `LDAP_OPT_X_TLS_PROTOCOL_TLS1_1`
- `LDAP_OPT_X_TLS_PROTOCOL_TLS1_2`
- `LDAP_OPT_X_TLS_PACKAGE`
- `LDAP_OPT_X_KEEPALIVE_IDLE`
- `LDAP_OPT_X_KEEPALIVE_PROBES`
- `LDAP_OPT_X_KEEPALIVE_INTERVAL`

### PostgreSQL

- `PGSQL_NOTICE_LAST`
- `PGSQL_NOTICE_ALL`
- `PGSQL_NOTICE_CLEAR`

### SPL

- `MT_RAND_PHP`