php 在 macOS 上安装 Composer 时出错（JIT 编译失败）
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Errors Installing Composer on macOS (JIT compilation Failed)
提问by sheraz m
When I run composer --versionin the macOS terminal I get the following errors:
当我composer --version在 macOS 终端中运行时，出现以下错误：
PHP Warning: preg_match(): JIT compilation failed: no more memory in phar:///usr/local/bin/composer.phar/vendor/symfony/console/Application.php on line 755
PHP 警告：preg_match()：JIT 编译失败：第 755 行的 phar:///usr/local/bin/composer.phar/vendor/symfony/console/Application.php 中没有更多内存
Warning: preg_match(): JIT compilation failed: no more memory in phar:///usr/local/bin/composer.phar/vendor/symfony/console/Application.php on line 755
PHP Warning: preg_match(): JIT compilation failed: no more memory in phar:///usr/local/bin/composer.phar/vendor/symfony/console/Application.php on line 759
Warning: preg_match(): JIT compilation failed: no more memory in phar:///usr/local/bin/composer.phar/vendor/symfony/console/Application.php on line 759
PHP Warning: preg_split(): JIT compilation failed: no more memory in phar:///usr/local/bin/composer.phar/vendor/symfony/console/Application.php on line 654
Warning: preg_split(): JIT compilation failed: no more memory in phar:///usr/local/bin/composer.phar/vendor/symfony/console/Application.php on line 654
PHP Warning: preg_split(): JIT compilation failed: no more memory in phar:///usr/local/bin/composer.phar/vendor/symfony/console/Application.php on line 1091
Warning: preg_split(): JIT compilation failed: no more memory in phar:///usr/local/bin/composer.phar/vendor/symfony/console/Application.php on line 1091
PHP Warning: preg_replace(): JIT compilation failed: no more memory in phar:///usr/local/bin/composer.phar/vendor/symfony/console/Formatter/OutputFormatter.php on line 36
Warning: preg_replace(): JIT compilation failed: no more memory in phar:///usr/local/bin/composer.phar/vendor/symfony/console/Formatter/OutputFormatter.php on line 36
[ErrorException]
preg_match_all(): JIT compilation failed: no more memory
回答by Karl Hill
回答by fab120
I solved this by disabling the PCRE jit compilation.
我通过禁用 PCRE jit 编译解决了这个问题。
I suppose you installed php 7.3 through homebrew.
我想你通过自制软件安装了 php 7.3。
If so, create a zzz-myphp.iniin /usr/local/etc/php/7.3/conf.dwith the following content:
如果是这样，创建一个zzz-myphp.ini在/usr/local/etc/php/7.3/conf.d使用以下内容：
; My php.ini settings
; Fix for PCRE "JIT compilation failed" error
[Pcre]
pcre.jit=0
回答by bishop
Other answers suggest disabling PCRE JIT via a configuration file. That works, but caveat: this disables PCRE JIT for allengine invocations that use those INI files. You therefore won't be getting JIT improvement for a potentially wider swath of functionality, which may not be desired.
其他答案建议通过配置文件禁用 PCRE JIT。这可行，但需要注意：这会为使用这些 INI 文件的所有引擎调用禁用 PCRE JIT 。因此，您不会因为潜在的更广泛的功能而获得 JIT 改进，这可能是不希望的。
You can disable JIT for composeronly via:
您composer只能通过以下方式禁用 JIT ：
php -d pcre.jit=0 composer.phar ...
回答by Ashish Sharma
In PHP 7.1.24 there is no 'pcre.jit'in php.ini file so you have to set
memory_limit:128M(if you increase this).
在 PHP 7.1.24 中没有 'pcre.jit'php.ini 文件，所以你必须设置
memory_limit:128M（如果你增加它）。
回答by ??ng Qu?c Anh
It work for me by follow steps:
它通过以下步骤对我有用：
- Open you Terminal and run php --ini
- Open file php.ini in the path "Loaded Configuration File: /usr/local/php5/lib/php.ini" https://prnt.sc/p9tspy
- Find pcre.jit and change ;pcre.jit=1 to pcre.jit=0
- 打开终端并运行 php --ini
- 在路径“加载的配置文件：/usr/local/php5/lib/php.ini”中打开文件php.ini https://prnt.sc/p9tspy
- 找到 pcre.jit 并将 ;pcre.jit=1 改为 pcre.jit=0
回答by Kristin Green
I got the same error. I installed MAMP 5.4 on my Mac OS 10.11.6 using PHP 7.3.7 and installed Composer. It seemed to work but as soon as I attempted to install Yii2 or even check the version, it gave me the error...
我得到了同样的错误。我使用 PHP 7.3.7 在 Mac OS 10.11.6 上安装了 MAMP 5.4 并安装了 Composer。它似乎有效，但是当我尝试安装 Yii2 甚至检查版本时，它给了我错误...
$composer.phar --version
Fatal error: Uncaught ErrorException: preg_match_all(): JIT compilation failed: no more memory in phar:///Users/kristin/Sites/htdocs/composer.phar/vendor/symfony/console/Formatter/OutputFormatter.php:137
Increasing the memory_limit in php.ini from 128M to anything did NOT solve the issue and pcre.jit=1 was commented out so turning it off didn't do anything either.
将 php.ini 中的 memory_limit 从 128M 增加到任何都没有解决问题，并且 pcre.jit=1 被注释掉，所以关闭它也没有做任何事情。
Here is what worked:
这是有效的：
I simply changed the export path to the previous version's directory (without actually downgrading in MAMP's preferences) and it worked!
我只是将导出路径更改为以前版本的目录（实际上并没有在 MAMP 的首选项中降级）并且它起作用了！
$export PATH=/Applications/MAMP/bin/php/php7.2.20/bin:$PATH
$composer.phar --version
Composer version 1.9.0 2019-08-02 20:55:32
If anyone can explain why this worked, I'd appreciate knowing. Cheers.
如果有人能解释为什么这行得通，我很高兴知道。干杯。
回答by sheraz m
Thanks for the answers.. I solved it by command composer.phar and then export path. Example:
感谢您的回答。我通过命令 composer.phar 解决了它，然后导出路径。例子：
$composer.phar
$export PATH=/usr/local/php5/bin:$PATH
$composer.phar --version
