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PHP 7.2 UPGRADE NOTES | |
1. Backward Incompatible Changes | |
2. New Features | |
3. Changes in SAPI modules | |
4. Deprecated Functionality | |
5. Changed Functions | |
6. New Functions | |
7. New Classes and Interfaces | |
8. Removed Extensions and SAPIs | |
9. Other Changes to Extensions | |
10. New Global Constants | |
11. Changes to INI File Handling | |
12. Windows Support | |
13. Other Changes | |
======================================== | |
1. Backward Incompatible Changes | |
======================================== | |
- Core: | |
. gettype() will now return "resource (closed)" instead of "unknown type" for | |
closed resources. | |
. is_object() will now return true for objects of class | |
__PHP_Incomplete_Class. | |
. Support for Netware operating systems has been removed. | |
. Casting arrays to objects (with (object) or settype()) will now convert | |
integer keys to string property names. This fixes the behaviour of previous | |
versions, where integer keys would become inaccessible properties with | |
integer names. | |
. Casting objects to arrays (with (array) or settype()), and retrieving | |
object properties in an array with get_object_vars(), will now convert | |
numeric string property names (that is, property names of the format | |
/^(0|(-?[1-9][0-9]*))$/ where PHP_INT_MIN <= n <= PHP_INT_MAX) to integer | |
keys. This fixes the behaviour of previous versions, where numeric string | |
property names would become inaccessible string keys. | |
. Unqualified references to undefined constants now generate a Warning instead | |
of a notice. They will generate an Error in a future version of PHP. | |
(https://wiki.php.net/rfc/deprecate-bareword-strings) | |
. Minimum supported Windows versions are Windows 7/Server 2008 R2. | |
. Initial trait property value compatibility check will no longer perform | |
any casts. (Bug #74269) | |
. "object" (in any case) can no longer be used as a class name. | |
- BCMath: | |
. The bcmod() function no longer truncates fractional numbers to integers. As | |
such, its behavior now follows fmod() rather than the `%` operator. For | |
example `bcmod('4', '3.5')` now returns '0.5' instead of '1'. | |
- Hash: | |
. The hash_hmac(), hash_hmac_file(), hash_pbkdf2() and hash_init() (with | |
HASH_HMAC) functions no longer accept non-cryptographic hashes. | |
- JSON | |
. The json_decode() option JSON_OBJECT_AS_ARRAY is used if the second | |
parameter (assoc) is null. Previously JSON_OBJECT_AS_ARRAY was always | |
ignored. | |
- Session: | |
. Removed register_globals related code and "!" can be used as $_SESSION key name. | |
. Session is made to manage session status correctly and prevents invalid operations. | |
Only inappropriate codes are affected by this change. If you have problems with this, | |
it means you have problem in your code. | |
. Functions are made to set or return correct session status. | |
session_start(), session_status(), session_regenerate_id() | |
. Functions are made to return bool from null. These functions have void parameter | |
and void parameter is checked. | |
session_unset(), session_write_close()/session_commit(), session_abort(), | |
session_reset() | |
. Functions prohibit invalid operations with regard to session status and | |
HTTP header status, returns correct bool return value. | |
session_start(), session_set_cookie_params(), session_name(), session_module_name(), | |
session_set_save_handler(), session_regenerate_id(), session_cache_limiter(), | |
session_cache_expire(), session_unset(), session_destroy(), | |
session_write_close()/session_commit(), session_reset() | |
. INI value change by ini_set() returns update status correctly. Invalid INI modifications | |
are checked and made to fail. | |
session.name, session.save_path, session.cookie_lifetime, session.cookie_path, | |
session.cookie_domain, session.cookie_httponly, session.cookie_secure, | |
session.use_cookies, session.use_only_cookies, session.use_strict_mode, | |
session.referer_check, session.cache_limiter, session.cache_expire, | |
session.lazy_write, session.save_handler, session.serialize_handler, | |
session.gc_probability, session.gc_divior, session.gc_maxlifetime, | |
. Some E_ERRORs are changed to E_WARNING since session status is managed correctly. | |
session_start() | |
. Session no longer initialize $_SESSION for invalid and useless session. | |
session_start() | |
. When headers are already sent and try to set new INI values, session_name(), | |
session_module_name(), session_save_path(), session_cache_limiter() and | |
session_cache_expire() are no longer works. Older PHPs accepts new values even | |
if new values will not be effective. | |
This new corrected behavior may affect command line mode CLI scripts that manage | |
sessions. Use output buffer just like web applications to resolve problems on | |
CLI scripts. | |
- Standard: | |
. Sequences generated by mt_rand() and rand() for a specific seed may differ | |
from PHP 7.1 on 64-bit machines. This change was necessary to resolve a | |
modulo bias bug in the implementation. | |
======================================== | |
2. New Features | |
======================================== | |
- Core: | |
. It is now possible to remove argument type annotations when overriding an | |
inherited method. This complies with contravariance of method argument types | |
under the Liskov Substitution Principle. | |
(https://wiki.php.net/rfc/parameter-no-type-variance) | |
. It is now allowed to override an abstract method with another abstract | |
method in a child class. | |
(https://wiki.php.net/rfc/allow-abstract-function-override) | |
. A trailing comma in group use statements is now allowed. | |
(https://wiki.php.net/rfc/list-syntax-trailing-commas) | |
. The "object" type annotation is now supported. | |
(https://wiki.php.net/rfc/object-typehint) | |
- DBA: | |
. Implemented support for the LMDB backend. | |
- JSON: | |
. Added JSON_INVALID_UTF8_IGNORE and JSON_INVALID_UTF8_SUBSTITUTE options for | |
json_encode() and json_decode() to ignore and replace invalid UTF-8 byte | |
sequences, respectively. | |
- OCI8: | |
. Added Oracle Database Transparent Application Failover (TAF) callback support. | |
- PCRE: | |
. Added `J` modifier for setting PCRE_DUPNAMES. | |
. Added `PREG_UNMATCHED_AS_NULL` flag to allow distinguish between unmatched | |
subpatterns and empty matches by reporting NULL and "" (empty string), | |
respectively. | |
- Sodium | |
. New cryptographic extension | |
- SQLite3: | |
. Implemented writing to BLOBs. | |
- Standard: | |
. Simplified password hashing API updated to support Argon2i hashes when PHP is compiled with libargon2 | |
(https://wiki.php.net/rfc/argon2_password_hash). | |
. proc_nice() is now supported on Windows platforms. | |
- Zip: | |
. read/write encrypted archive, relying on libzip 1.2.0, | |
using new methods: | |
ZipArchive::setEncryptionName($name, $method [, $password]); | |
ZipArchive::setEncryptionIndex($index, $method [, $password]); | |
and new constants: | |
ZipArchive::EM_NONE | |
ZipArchive::EM_AES_128 | |
ZipArchive::EM_AES_192 | |
ZipArchive::EM_AES_256 | |
. accept 'password' from zip stream context | |
. ZipArchive implements countable, added ZipArchive::count() method. | |
======================================== | |
3. Changes in SAPI modules | |
======================================== | |
======================================== | |
4. Deprecated Functionality | |
======================================== | |
All the deprecated functionality listed in the following will be removed in | |
PHP 8.0. | |
- Core: | |
. The track_errors ini directive has been deprecated. | |
. The __autoload() mechanism has been deprecated, use spl_autoload_register() | |
instead. | |
. The (unset) cast has been deprecated. This does not affect the unset($var) | |
language construct. | |
. The create_function() function has been deprecated, use anonymous functions | |
instead. | |
. The each() function has been deprecated, use a foreach loop instead. | |
. The $errcontext error handler argument has been deprecated. However, using | |
it does not trigger a deprecation warning for technical reasons. | |
- EXIF: | |
. The read_exif_data() alias has been deprecated, use exif_read_data() instead. | |
- GD: | |
. png2wbmp() and jpeg2wbmp() have been deprecated. | |
- GMP: | |
. The gmp_random() function has been deprecated, use gmp_random_bits() or | |
gmp_random_range() instead. | |
- Intl: | |
. INTL_IDNA_VARIANT_2003 has been deprecated; use INTL_IDNA_VARIANT_UTS46 | |
instead. | |
- Mbstring: | |
. The mbstring.func_overload ini directive has been deprecated. | |
- Standard: | |
. Calling parse_str() without the result argument has been deprecated. | |
. Calling assert() with a string argument has been deprecated, use an ordinary | |
expression instead. | |
See also: https://wiki.php.net/rfc/deprecations_php_7_2 | |
======================================== | |
5. Changed Functions | |
======================================== | |
- Standard: | |
. password_hash() can generate Argon2i hashes when the algorithm is set to PASSWORD_ARGON2I. | |
When using PASSWORD_ARGON2I, the following cost factors may be set: 'memory_cost', 'time_cost', | |
and 'threads'. These cost factors will default to 'PASSWORD_ARGON2_DEFAULT_MEMORY_COST', | |
'PASSWORD_ARGON2_DEFAULT_TIME_COST', and 'PASSWORD_ARGON2_DEFAULT_THREADS' respectively if not set. | |
. password_verify() can verify Argon2i hashes. | |
. password_get_info() and password_needs_rehash() can accept Argon2i hashes. | |
. mail()/mb_send_mail() accept array $extra_header. Array parameter is checked against RFC 2822. | |
Array format is | |
$extra_headers = [ | |
'Header-Name' => 'Header value', | |
'Multiple' => ['One header', 'Another header'], | |
'Multiline' = "FirstLine\r\n SecondLine", | |
]; | |
. count() now raises a warning when an invalid parameter is passed. | |
Only arrays and objects implementing the Countable interface should be passed. | |
. pack() and unpack() now support float and double in both little and big endian. | |
. number_format() ensures zero values never contain a negative sign. | |
- XML: | |
. utf8_encode() and utf8_decode() have been moved to the Standard extension | |
as string functions. | |
======================================== | |
6. New Functions | |
======================================== | |
- Core: | |
. Added stream_isatty(). | |
. Added sapi_windows_vt100_support(). | |
- DOM: | |
. DomNodeList implements Countable, added DomNodeList::count(). | |
. DOMNamedNodeMap implements Countable, added DOMNamedNodeMap::count(). | |
- FTP: | |
. Added ftp_append(). | |
- GD: | |
. Added imagesetclip() and imagegetclip(). | |
. Added imageopenpolygon(). | |
. Added imageresolution(). | |
. Added imagecreatefrombmp() and imagebmp(). | |
- Mbstring: | |
. Added mb_chr() and mb_ord(). | |
. Added mb_scrub() that scrubs broken multibyte strings. | |
- OCI8: | |
. Added oci_register_taf_callback() and oci_disable_taf_callback() for | |
Oracle Database TAF callback support. | |
- Sockets: | |
. Added socket_addrinfo_lookup(), socket_addrinfo_connect(), | |
socket_addrinfo_bind() and socket_addrinfo_explain(). | |
======================================== | |
7. New Classes and Interfaces | |
======================================== | |
======================================== | |
8. Removed Extensions and SAPIs | |
======================================== | |
- Mcrypt: | |
. The deprecated mcrypt extension has been moved to PECL. | |
. libmcrypt has not been maintained since 2007 and the continued use of this | |
extension is strongly discouraged. | |
. Users are advised to use alternatives such as OpenSSL or libsodium. | |
======================================== | |
9. Other Changes to Extensions | |
======================================== | |
- EXIF: | |
. Added extended exif tag support for the following formats: | |
Samsung, DJI, Panasonic, Sony, Pentax, Minolta, Sigma/Foveon, | |
AGFA, Kyocera, Ricoh & Epson. | |
. exif_read_data() and exif_thumbnail() now supports a passed streams as their | |
first parameter. | |
- GD: | |
. Removed --enable-gd-native-ttf configuration option which was unused as | |
of PHP 5.5.0 anyway. | |
. imagegd() stores truecolor images as real truecolor images. Formerly, they | |
have been converted to palette. | |
. imageantialias() is now also available if compiled with a system libgd. | |
- Mbstring | |
. mb_check_encoding() accepts array parameter. Both key and value | |
encodings are checked recursively. | |
. mb_convert_encoding() accepts array parameter. Only value encodings | |
are converted recursively. | |
- PDO_OCI: | |
. The '--with-pdo-oci' configure syntax no longer needs the vesion number of the | |
Oracle Instant Client. | |
- pdo_sqlite | |
. Use sqlite3_prepare_v2() and sqlite3_close_v2() functions instead of their | |
legacy counterparts. | |
======================================== | |
10. New Global Constants | |
======================================== | |
- Core: | |
. PHP_FLOAT_DIG number of decimal digits, that can be rounded into a | |
float and back without precision loss | |
. PHP_FLOAT_EPSILON smallest representable positive number x, so then | |
x + 1.0 != 1.0 | |
. PHP_FLOAT_MIN min representable float number | |
. PHP_FLOAT_MAX max representable float number | |
. PHP_OS_FAMILY current operating system family | |
- Fileinfo: | |
. FILEINFO_EXTENSION include list of possible file extensions | |
- GD: | |
. IMG_EFFECT_MULTIPLY | |
. IMG_BMP | |
- PCRE | |
. PREG_UNMATCHED_AS_NULL | |
- Standard: | |
. PASSWORD_ARGON2_DEFAULT_MEMORY_COST | |
. PASSWORD_ARGON2_DEFAULT_TIME_COST | |
. PASSWORD_ARGON2_DEFAULT_THREADS | |
. PASSWORD_ARGON2I | |
======================================== | |
11. Changes to INI File Handling | |
======================================== | |
- sql.safe_mode | |
. This INI directive has been removed. | |
- realpath_cache_size | |
. Set to 4096k by default | |
======================================== | |
12. Windows Support | |
======================================== | |
- Support for VT100 console mode | |
On systems starting with 10.0.10586, cmd.exe supports ANSI escape sequences. | |
The corresponding console mode is enabled by default on CLI on suitable | |
systems. As well, the function sapi_windows_vt100_support() is provided, | |
to control and query the corresponding information in the scripts. | |
======================================== | |
13. Other Changes | |
======================================== | |
- Build system | |
Autoconf minimal version is now 2.64. |