我想为Symfony 4贡献一些代码。因此，我遵循指南（https://symfony.com/doc/current/contributing/code/patches.html），分叉Symfony并调用测试。该指南说＆＃34; PHP 5.5.9或更高版本＆＃34;但是由于PHP 7新语法，测试失败。所以我切换到在Windows 7 x64上运行的PHP 7.2。
在触及任何代码之前运行php ./phpunit symfony时，大量测试失败。大多数测试都会失败并显示消息＆＃34;其他弃用通知＆＃34;：
Testing src/Symfony/Component/Messenger
.............. 14 / 14 (100%)
Time: 3.66 seconds, Memory: 6.00MB
OK (14 tests, 25 assertions)
Other deprecation notices (1)
1x: The each() function is deprecated. This message will be suppressed on further calls
KO src/Symfony/Component/Messenger
最后它说，＆＃34;好但不完整，......＆＃34;
Testing src/Symfony/Bundle/FrameworkBundle
............................................................. 61 / 1083 ( 5%)
............................................................. 122 / 1083 ( 11%)
............................................................. 183 / 1083 ( 16%)
............................................................. 244 / 1083 ( 22%)
............................................................. 305 / 1083 ( 28%)
............................................................. 366 / 1083 ( 33%)
............................................................. 427 / 1083 ( 39%)
.....................S....................................... 488 / 1083 ( 45%)
............................................................. 549 / 1083 ( 50%)
............................................................. 610 / 1083 ( 56%)
..................SS......................................... 671 / 1083 ( 61%)
............................................................. 732 / 1083 ( 67%)
............................................................. 793 / 1083 ( 73%)
............................................................. 854 / 1083 ( 78%)
............................................................. 915 / 1083 ( 84%)
............................................................. 976 / 1083 ( 90%)
............................................................. 1037 / 1083 ( 95%)
.............................................. 1083 / 1083 (100%)
Time: 3.94 minutes, Memory: 108.00MB
OK, but incomplete, skipped, or risky tests!
Tests: 1083, Assertions: 2282, Skipped: 3.
Legacy deprecation notices (14)
Other deprecation notices (1)
1x: The each() function is deprecated. This message will be suppressed on further calls
KO src/Symfony/Bundle/FrameworkBundle
还有＆＃34;真实＆＃34;错误：
1) Symfony\Component\Security\Core\Tests\Encoder\Argon2iPasswordEncoderTest::testValidationWithConfig
password_hash(): Memory cost is outside of allowed memory range
C:\Daten\Projekte\2018\dev\symfony\src\Symfony\Component\Security\Core\Encoder\Argon2iPasswordEncoder.php:105
C:\Daten\Projekte\2018\dev\symfony\src\Symfony\Component\Security\Core\Encoder\Argon2iPasswordEncoder.php:67
C:\Daten\Projekte\2018\dev\symfony\src\Symfony\Component\Security\Core\Tests\Encoder\Argon2iPasswordEncoderTest.php:34
或在这里：
1) Symfony\Component\Console\Tests\Helper\QuestionHelperTest::testAskChoice
Symfony\Component\Console\Exception\RuntimeException: Aborted
C:\Daten\Projekte\2018\dev\symfony\src\Symfony\Component\Console\Helper\QuestionHelper.php:118
C:\Daten\Projekte\2018\dev\symfony\src\Symfony\Component\Console\Helper\QuestionHelper.php:67
C:\Daten\Projekte\2018\dev\symfony\src\Symfony\Component\Console\Helper\QuestionHelper.php:369
C:\Daten\Projekte\2018\dev\symfony\src\Symfony\Component\Console\Helper\QuestionHelper.php:70
C:\Daten\Projekte\2018\dev\symfony\src\Symfony\Component\Console\Tests\Helper\QuestionHelperTest.php:89
或在这里：
1) Symfony\Component\VarDumper\Tests\Dumper\ServerDumperTest::testDump
Symfony\Component\Process\Exception\ProcessTimedOutException: The process "C:\Software\Development\Php7\php.exe" exceede
d the timeout of 9 seconds.
C:\Daten\Projekte\2018\dev\symfony\src\Symfony\Component\Process\Process.php:1154
C:\Daten\Projekte\2018\dev\symfony\src\Symfony\Component\Process\Process.php:383
C:\Daten\Projekte\2018\dev\symfony\src\Symfony\Component\VarDumper\Tests\Dumper\ServerDumperTest.php:92