CLI

Using -a without the readline extension will now result in an error. Previously, -a without readline had the same behavior as calling php without any arguments, apart from printing an additional "Interactive mode enabled" message. This mode was not interactive.

PHPDBG

Remote functionality from phpdbg has been removed.

Core

The order of properties used in foreach, var_dump, serialize, object comparison, etc. was changed. Properties are now ordered naturally according to their declaration and inheritance. Properties declared in a base class are going to be before the child properties.

This order is consistent with internal layout of properties in zend_object structure and repeats the order in default_properties_table[] and properties_info_table[]. The old order was not documented and was caused by class inheritance implementation details.

Filter

The FILTER_FLAG_ALLOW_OCTAL flag of the FILTER_VALIDATE_INT filter now accept octal string with the leading octal prefix ("0o"/"0O").

GMP

All GMP functions now accept octal string with the leading octal prefix ("0o"/"0O").

PDO ODBC

PDO::getAttribute with PDO::ATTR_SERVER_INFO and PDO::ATTR_SERVER_VERSION now return values instead of throwing PDOException.

Reflection

ReflectionProperty::setAccessible and ReflectionMethod::setAccessible no longer have an effect. Properties and methods are now always considered accessible via Reflection.

Standard

syslog is now binary safe.

GD

imagewebp can now do lossless WebP encoding by passing IMG_WEBP_LOSSLESS as the quality.

This constant is only defined, if the used libgd supports lossless WebP encoding.

MySQLi

mysqli_stmt::next_result and mysqli::fetch_all are now available when linking against libmysqlclient.

OpenSSL

• The OpenSSL extension now requires at least OpenSSL version 1.0.2.

• OpenSSL 3.0 is now supported. Be aware that many ciphers are no longer enabled by default (part of the legacy provider), and that parameter validation (e.g. minimum key sizes) is stricter now.

Phar

• SHA256 is now used by default for signatures.

• Added support for OpenSSL_SHA256 and OpenSSL_SHA512 signatures.

SNMP

• Added support for SHA256 and SHA512 for the security protocol.

Standard

--with-password-argon2 now uses pkg-config to detect libargon2. As such, an alternative libargon2 location should now be specified using PKG_CONFIG_PATH.