The PHP Interpreter
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Niels Dossche f150f99752
Improve browscap get_browser performance (#12651)
* Split function and use _new variant to avoid redundant checks

* Precompute better array size to avoid rehashing

* Use new function to add into array instead of merging into, preventing temporary memory allocations

* Convert to regex without separate copy + lowering

We're already doing a character-wise loop after lowering, so just lower
it character by character instead of looping over it twice and
allocating memory.

* Use HASH_MAP loop because htab can never be packed

This saves additional checks.

* Move destructor to more sensible place

* Remove now unused browscap_zval_copy_ctor

* Use zend_string_release_ex variant where possible

* Implement dedicated greedy wildcard matching algorithm

This avoids compiling, allocating and caching regexes and should run in
the same complexity.

* Cache previous length instead of repeatedly recomputing it

* Add additional optimization to wildcard * matching

* Move cheap checks to the callsite

The function prologue and epilogue have a stupidly high overhead for
those 2 simple checks at the start.

We can't always-inline the reg_compare function because it contains
alloca, and the alloca is really important for performance.
Instead, move those cheap checks to the call site.

* Use specialised loop to avoid unnecessary conversions and checks

* Optimize counting loop by taking into account the prefix

* Precompute the hash values of known keys

* [ci skip] UPGRADING

* Code style

* Add a note why we have the early-skip checks in the loop
2023-11-11 18:44:17 +01:00
.circleci Remove redundant CI JIT flags 2023-10-13 11:49:42 +02:00
.github Merge branch 'PHP-8.3' 2023-10-31 11:49:19 +01:00
appveyor Merge branch 'PHP-8.1' into PHP-8.2 2022-10-09 18:48:07 +02:00
benchmark Drop Laravel from benchmark CI (#12595) 2023-11-02 11:38:31 +01:00
build [skip ci] gen_stub: Fix final comment text generation 2023-11-07 16:37:35 +00:00
docs Zend: Add ZPP F type check for callables that do not free trampolines 2023-10-10 13:44:21 +01:00
ext Improve browscap get_browser performance (#12651) 2023-11-11 18:44:17 +01:00
main PHP-8.1 is now for PHP 8.1.27-dev 2023-11-07 14:28:31 -06:00
pear [ci skip] Remove text editor modelines 2019-03-23 21:09:38 +01:00
sapi Merge branch 'PHP-8.3' 2023-11-11 18:36:41 +01:00
scripts also display PHP version in phpize 2023-09-07 16:34:09 +02:00
tests Close PHP tags in tests 2023-10-18 17:34:10 +02:00
travis Remove unused --with-zlib-dir configure option 2023-09-14 22:21:54 +02:00
TSRM Merge branch 'PHP-8.2' 2023-04-08 16:47:05 +02:00
win32 Add zend_worklist.h to PHP_INSTALL_HEADERS (#12571) 2023-10-30 19:37:27 +01:00
Zend Test that objects free handler call zend_weakrefs_notify (#12546) 2023-11-11 13:53:35 +01:00
.cirrus.yml Merge branch 'PHP-8.2' into PHP-8.3 2023-10-30 11:28:24 +01:00
.editorconfig Fix JIT crash with large number of match/switch arms (#8961) 2022-07-18 12:34:20 +02:00
.gdbinit Zend/zend_types.h: deprecate zend_bool, zend_intptr_t, zend_uintptr_t (#10597) 2023-02-18 19:31:28 +00:00
.gitattributes [RFC] DOM HTML5 parsing and serialization support (Lexbor library part) (#12493) 2023-10-22 17:26:21 +02:00
.gitignore Add manifest file generated for releases to gitignore 2023-11-07 14:45:05 -06:00
.travis.yml Merge branch 'PHP-8.2' into PHP-8.3 2023-10-18 15:39:32 +02:00
buildconf Fix Autoconf check for development versions (#11532) 2023-07-18 17:54:00 +02:00
buildconf.bat Fix #79146: cscript can fail to run on some systems 2020-01-21 11:53:11 +01:00
codecov.yml [RFC] DOM HTML5 parsing and serialization support (Lexbor library part) (#12493) 2023-10-22 17:26:21 +02:00
CODEOWNERS [ci skip] Add myself to CODEOWNERS for ext/xsl 2023-11-10 17:30:19 +01:00
CODING_STANDARDS.md CODING_STANDARDS.md: add rules for bool/zend_result return types (#10630) 2023-02-22 14:13:57 +00:00
configure.ac PHP-8.1 is now for PHP 8.1.27-dev 2023-11-07 14:28:31 -06:00
CONTRIBUTING.md Add reference to IR framework 2023-10-31 08:54:04 +03:00
EXTENSIONS [skip ci] Update ext/random year for myself in EXTENSIONS 2023-03-20 19:23:28 +01:00
LICENSE [skip ci] Update year to 2023 (#10374) 2023-01-19 12:01:29 +01:00
NEWS Merge branch 'PHP-8.2' into PHP-8.3 2023-11-11 18:36:32 +01:00
php.ini-development Merge branch 'PHP-8.2' 2023-08-19 22:54:44 +03:00
php.ini-production Merge branch 'PHP-8.2' 2023-08-19 22:54:44 +03:00
README.md Merge branch 'PHP-8.2' 2023-07-05 15:17:11 +02:00
README.REDIST.BINS [RFC] DOM HTML5 parsing and serialization support (Lexbor library part) (#12493) 2023-10-22 17:26:21 +02:00
run-tests.php Declare missing types and other minor improvements in run-tests.php (#12573) 2023-10-31 14:56:06 +01:00
SECURITY.md Update to use GitHub security issue reporting 2023-02-15 21:56:03 -06:00
UPGRADING Improve browscap get_browser performance (#12651) 2023-11-11 18:44:17 +01:00
UPGRADING.INTERNALS Remove php_xsl_create_object() (#12492) 2023-10-21 23:48:27 +02:00

The PHP Interpreter

PHP is a popular general-purpose scripting language that is especially suited to web development. Fast, flexible and pragmatic, PHP powers everything from your blog to the most popular websites in the world. PHP is distributed under the PHP License v3.01.

Push Build status Fuzzing Status

Documentation

The PHP manual is available at php.net/docs.

Installation

Prebuilt packages and binaries

Prebuilt packages and binaries can be used to get up and running fast with PHP.

For Windows, the PHP binaries can be obtained from windows.php.net. After extracting the archive the *.exe files are ready to use.

For other systems, see the installation chapter.

Building PHP source code

For Windows, see Build your own PHP on Windows.

For a minimal PHP build from Git, you will need autoconf, bison, and re2c. For a default build, you will additionally need libxml2 and libsqlite3.

On Ubuntu, you can install these using:

sudo apt install -y pkg-config build-essential autoconf bison re2c \
                    libxml2-dev libsqlite3-dev

On Fedora, you can install these using:

sudo dnf install re2c bison autoconf make libtool ccache libxml2-devel sqlite-devel

Generate configure:

./buildconf

Configure your build. --enable-debug is recommended for development, see ./configure --help for a full list of options.

# For development
./configure --enable-debug
# For production
./configure

Build PHP. To speed up the build, specify the maximum number of jobs using -j:

make -j4

The number of jobs should usually match the number of available cores, which can be determined using nproc.

Testing PHP source code

PHP ships with an extensive test suite, the command make test is used after successful compilation of the sources to run this test suite.

It is possible to run tests using multiple cores by setting -jN in TEST_PHP_ARGS:

make TEST_PHP_ARGS=-j4 test

Shall run make test with a maximum of 4 concurrent jobs: Generally the maximum number of jobs should not exceed the number of cores available.

The qa.php.net site provides more detailed info about testing and quality assurance.

Installing PHP built from source

After a successful build (and test), PHP may be installed with:

make install

Depending on your permissions and prefix, make install may need super user permissions.

PHP extensions

Extensions provide additional functionality on top of PHP. PHP consists of many essential bundled extensions. Additional extensions can be found in the PHP Extension Community Library - PECL.

Contributing

The PHP source code is located in the Git repository at github.com/php/php-src. Contributions are most welcome by forking the repository and sending a pull request.

Discussions are done on GitHub, but depending on the topic can also be relayed to the official PHP developer mailing list internals@lists.php.net.

New features require an RFC and must be accepted by the developers. See Request for comments - RFC and Voting on PHP features for more information on the process.

Bug fixes don't require an RFC. If the bug has a GitHub issue, reference it in the commit message using GH-NNNNNN. Use #NNNNNN for tickets in the old bugs.php.net bug tracker.

Fix GH-7815: php_uname doesn't recognise latest Windows versions
Fix #55371: get_magic_quotes_gpc() throws deprecation warning

See Git workflow for details on how pull requests are merged.

Guidelines for contributors

See further documents in the repository for more information on how to contribute:

Credits

For the list of people who've put work into PHP, please see the PHP credits page.