PHP7.2 version performance introduction

This article mainly introduces the performance of PHP7.2 version to you in detail, hoping to help everyone have a clearer understanding of PHP7.2.

1. Backward-incompatible changes

Core:

• For closed resources, the gettype() function will return resource (closed), replacing the previous unknown type.

• For __PHP_Incomplete_Class class object, is_object ()The function will return true.

• #Remove support for Netware operating system.

• array type is converted to object type ((object)orsettype() ), the integer key will be converted into an attribute name, which fixes the problem that the numeric key in the previous version cannot be used as an attribute name.

• Convert object type to array type ((array)or settype() ), and when the properties of an object are mapped to an array (get_object_vars()), the integer properties will be converted into numeric keys, which fixes the previous version The problem of inaccessible integer properties.

• Unqualified reference to an undefined constant will result in a warning level error, replacing the previous notice level, and subsequent versions will be error level errors. .

• #The minimum supported Windows versions are Windows 7 and Windows Server 2008 R2.

• Cancels the compatibility checking behavior of native trait attribute values.

• object will not be used as a class name.

BcMath

• ## and fmod()The function is the same, the bcmod() function cancels the modulo operation (%), that is, the decimal part of the value is truncated into an integer. For example: bcmod('4', '3.5') will return 0.5 instead of 1.

Hash

• ##hash_hmac (), hash_hmac_file(), hash_pbkdf2() and hash_init() (when the options parameter is HASH_HMAC), these functions will no longer support non-encrypted hash functions.

##JSON

• ##When

  json_decode()When the second parameter assoc of the function is null, the options support option JSON_OBJECT_AS_ARRAY will be enabled, before This parameter has been ignored by us in the version.

  ##Session

#Move In addition to

• register_globals

  related code, "!" can be used in the key name of $_SESSION.

  session
• is used to correctly manage the session state and prohibit invalid operations. When there is a problem with the code, it will will trigger the change. If you unfortunately encounter this problem, it means there is a problem with your code.
  ##sesseion_start()
,

• session_status(), session_regenerate_id(), these functions are used to set or return the correct session state.

• ##session_unset(), session_write_close()/ session_commit(), session_abort(), session_reset(), these functions return no return value. Returns a Boolean value. They allow empty parameters and have checks for these empty.

• ##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(), these functions will disable invalid session status and http header status, and return the correct Boolean value or numerical value.

• ##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_pior, session.gc_maxlifetime, the setting of these ini values ​​must be successfully called by the ini_set() function , invalid ini modification operations will not succeed.

Because the session can be managed correctly (

• session_start()), some E_ERROR Error messages of level will be converted to level E_WARNING.

Sessions will no longer be initialized with invalid and useless sessions
• ##When the header information has been sent, setting the new ini value will be invalid at this time (via

  session_name(), session_module_name(), session_save_path(), session_cache_limiter() and session_cache_expire() These functions).

  Now these correct behaviors will affect the state of management sessions in cli command line mode. Using output buffering as in web applications will solve the problem with cli scripts.

  
  

Standard

Since version 7.1 , on a 64-bit machine, the order of random numbers generated by

mt_rand()

and rand() with the same seed may be different. Same.

##2. New Features

Core

When overriding a method or interface, its parameter type can be omitted. This obeys the contravariance of the parameter type of the Liskov equilibrium principle.

• Allows the inherited abstract class to override the abstract method of the inherited abstract class.

• # Allows trailing commas to group namespaces.

• #Annotations for object types are allowed.

##DBA

• ##Implementation Added support for LMDB backend.

##JSON

• ##at

  json_encode() and json_decode() Added support for JSON_INVALID_IGNORE and ## Support for #JSON_INVALTD_UTF8_SUBSTITUTE replaces the previous utf-8 encoded invalid type. ##OCI8

##increase Provides support for Transparent Application Failover (TAF) of Oracle Database.

• PCRE

##increase Internal option (j) modifies the local

PCRE_DUPNAMES

• option.

  Sodium

##New encryption extension.

• ##SQLite3

##Implementation to write BLOBs.

• Standard

##When When compiling PHP with libargon2, the simplified password hashing API has been updated to support Argon2.

windows platform supports the

• proc_nice()

  function.

• Zip

##Read /Write encrypted archive, depends on libzip 1.2.0, New method:

ZipArchive:: setEncryptionName($name, $method[,$password]); ZipArchive::setEncryptionIndex($index, $method[ , $ password]); New constants: ZipArchive:: EM_NONE ZipArchive:: EM_AES_128 ZipArchive:: EM_AES_192 ZipArchive:: EM_AES_256

• ##Accepts "password" from the zip stream context. ZipArchive implements countability and adds the ZipArchive::count()

  method.
3. SAPI module changes

• 4. Deprecated functionality

The following are the features that will be abandoned in the php8.0 version.

Core

## Track errors in the configuration file will be Abandoned.

##__autoload()

will be deprecated, use

• spl_autoload_register()

  instead.

• (unset) will be abandoned. This change will not affect unset ($var) language structure.

• create_function()The function will be deprecated and replaced by an anonymous function. ##each()

Function structure will be deprecated, use

• foreach()Loop instead.

• Exif

  ##read_exif_data () will be deprecated, use

  exif_read_data()

instead.

GD

• • png2wbmp() and jpeg2wbmp() will be deprecated.

  GMP

  • ##gmp_random () will be deprecated, use gmp_random_bits() or () instead.

  Intl

  • #INTL_IDNA_VARIANT_2003 will be deprecated, use INTL_IDNA_VARIANT_UTS46 instead.

  Mbstring

  • ##mbstring The configuration file of .func_overload will be discarded.

  Standard
  • ##No need Parameters to call

    parse_str() will be discarded.

    Calling
  • assert()

    with string parameters will be deprecated and use regular expressions instead.

  5. Changed functions

  Standard

  • When set to

    PASSWORD_ARGON2I, password_hash()Argon2 hash can be generated.

  ##When using PASSWORD_ARGON2I, the following options may be set by default:

  • memory_cost , time_cost. The default value for these options is PASSWORD_ARGON2_DEFAULT_MEMORY_COST. If not set, the defaults are PASSWORD_ARGON2_DEFAULT_TIME_COST and PASSWORD_ARGON2_DEFAULT_THREADS.

  password_verify()

  • Argon2 hashes can be verified.

    ##password_get_info()
  • and

    password_needs_rehash() can Accepts Argon2 hashes. #mail()/mb_send_mail()

  Accepts array

  • $extra_header . Array parameters are checked against RFC 2822. Array format: php $extra_headers = [ 'Header-Name' => 'Header value', 'Multiple' => ['One header', 'Another header'], 'Multiline' = " FirstLine\r\n SecondLine", ]; ##When an invalid parameter is passed, count()

    The function will throw warning warning.

  • In big-endian and little-endian byte order, pack()

    and
  • unpack()

    Supports float and double types. number_format()

    The function will ensure that the zero value does not contain a negative sign.

  • ##XML

  #utf8_encode () and

  utf8_decode()
  • functions have been moved to the standard extension as strings.

    6. New functions

  Core

  Add stream_istty()

  .

  • Addedsapi_windows_vt100_support()

    .

  • ##DOM

  ##DomNodeList

  Implemented Countable and added DomNodeList::count()

  .
  • DOMNamedNodeMapImplements Countable and adds DOMNamedNodeMap::count().

  FTP

  • ##increase ftp_append().

  GD

  • ##increase imagesetclip() and imagegetclip().

  • Addedimageopenpolygon().

  • Addedimageresolution().

  • Added imagecreatefrombmp() and imagebmp( ).

  Hash

  • ##increase hash_hmac_algos().

  Mbstring
  • ##increase

    mb_chr() and mb_ord().

  • Added

    mb_scrub.

    ##OCI8
  ##increase Added
  • oci_register_taf_callback()

    and oci_unregister_taf_callback() support for Transparent Application Failover (TAF) for Oracle databases. Sockets

  ##increase The

  socket_addrinfo_lookup()

  • , socket_addrinfo_connect(), socket_addrinfo_bind() and socket_addrinfo_explain(). SPL

  ##increase

  spl_object_id()
  • .

    7. New classes and interfaces

  8. Move Extensions and SAPI

  Mcypt

  # #The deprecated mcrypt extension has been moved to PECL.

  • libmcrypt has not been maintained since 2007 and continued use of this extension is not recommended.

  • 9. Other changes to the extension

  EXIF

  Added exif tag support for the following formats: Samsung, DJI, Panasonic, Sony, Pentax, Minolta, Sigma/Foveon, AGFA, Kyocera, Ricoh & Epson.

  • ##exif_read_data() and

    exif_t ​​humbnail()
  • Supports passing streams as the first argument.

    ##GD

  ##Move In addition to the

  --enable-gd-native-ttf configuration option.

  • imagegd() Store the truecolor image as a true color image, replacing the previous conversion to color correction plate.

  • mageantialias() is also supported when compiling with system libgd.

  • Mbstring

  ##mb_check_encoding ()

  Accepts an array parameter and recursively checks its keys and values.

  • ##mb_convert_encoding()

    Accepts an array parameter, the encoding of its value can be converted recursively.

  PDO_OCI

  • ##--with-pdo-oci The configuration syntax of is no longer available for Oracle clients.

  ##pdo_sqlite

  • ##Use sqlite3_prepare_v2() and sqlite3_close_v2() to replace their previous functions.

  10. New global constant
  Core
  • ##PHP_FLOAT_DIG

    ##PHP_FLOAT_EPSILON

  • PHP_FLOAT_MIN

  • PHP_FLOAT_MAX

  • PHP_OS_FAMILY

  • Fileinfo
  ##FILEINFO_EXTENSION

  • 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 in INI file handling

  • sql.safe_mode

  This INI option has been removed.
  realpath_cache_size
  ##Default It's 4096k.

  ##opcache.fast_shutdown

  • This INI option has been removed. A variant of fast_shutdown handling has been integrated into the PHP kernel and will be enabled by default in production environments.

  12. Windows support

  • Support VT100 console mode.

  13. Other changes

  • Compilation system

  The minimum supported version of autoconf is 2.64.

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