Core:
- Improved PHP GC. 提升php的垃圾回收機制
- Redesigned the old ext_skel program written in PHP, run: 'php ext_skel.php' for all options. This means there are no dependencies, thus making it work on Windows out of the box.
- Removed support for BeOS. 不在支持BeOS
- Add PHP_VERSION to phpinfo() <title/>.
- Add net_get_interfaces().
- Implemented flexible heredoc and nowdoc syntax, per RFC https://wiki.php.net/rfc/flexible_heredoc_nowdoc_syntaxes.
- Added support for references in list() and array destructuring, per RFC https://wiki.php.net/rfc/list_reference_assignment.
- Improved effectiveness of ZEND_SECURE_ZERO for NetBSD and systems without native similar feature.
- Added syslog.facility and syslog.ident INI entries for customizing syslog logging.
- The declaration and use of case-insensitive constants has been deprecated.
- Added syslog.filter INI entry for syslog filtering.
cURL:
- Expose curl constants from curl 7.50 to 7.61.
Date:
- Updated timelib to 2018.01RC1 to address several bugs:
Filter:
- Added the 'add_slashes' sanitization mode (FILTER_SANITIZE_ADD_SLASHES).
FPM:
- Added fpm_get_status function.
GD:
- Added support for WebP in imagecreatefromstring().
GMP:
- Export internal structures and accessor helpers for GMP object.
- Added gmp_binomial(n, k).
- Added gmp_lcm(a, b).
- Added gmp_perfect_power(a).
- Added gmp_kronecker(a, b).
- JSON:
- Added JSON_THROW_ON_ERROR flag.
LDAP:
- Added ldap_exop_refresh helper for EXOP REFRESH operation with dds overlay.
- Added full support for sending and parsing ldap controls.
MBstring:
- Updated to Oniguruma 6.9.0.
ODBC:
- Removed support for ODBCRouter.
- Removed support for Birdstep.
OpenSSL:
- Added openssl_pkey_derive function.
- Add min_proto_version and max_proto_version ssl stream options as well as related constants for possible TLS protocol values.
PCRE:
- Implemented https://wiki.php.net/rfc/pcre2-migration.
- Upgrade PCRE2 to 10.32.
PDO_DBlib:
- Implemented FR #69592 (allow 0-column rowsets to be skipped automatically).
- Expose TDS version as \PDO::DBLIB_ATTR_TDS_VERSION attribute on \PDO instance.
- Treat DATETIME2 columns like DATETIME.
PDO SQLite:
- Add support for additional open flags
pgsql:
- Added new error constants for pg_result_error(): PGSQL_DIAG_SCHEMA_NAME, PGSQL_DIAG_TABLE_NAME, PGSQL_DIAG_COLUMN_NAME, PGSQL_DIAG_DATATYPE_NAME, PGSQL_DIAG_CONSTRAINT_NAME and PGSQL_DIAG_SEVERITY_NONLOCALIZED.
readline:
- Added completion_append_character and completion_suppress_append options to readline_info() if linked against libreadline.
SQLite3:
- Updated bundled libsqlite to 3.24.0.
Standard:
- Added is_countable() function.
- Added support for the SameSite cookie directive, including an alternative signature for setcookie(), setrawcookie() and session_set_cookie_params().
- Remove superfluous warnings from inet_ntop()/inet_pton().
- Added hrtime() function, to get high resolution time.
Tidy:
- Support using tidyp instead of tidy.
Zlib:
- Added zlib/level context option for compress.zlib wrapper.
總結：7.3.0是個優化版本 對老代碼基本沒有影響，可以升級