引言

今天在教別人使用protobuf的時(shí)候，無意中發(fā)現(xiàn)了一個(gè)php cli模式下的詭異問題，費(fèi)了老半天的找到解決方法了，這里拿出來分享下。

問題描述

我們這邊最先引入了protobuf協(xié)議，使用的是allegro/php-protobuf這個(gè)擴(kuò)展安裝的。這幾天其他同事也要用到這個(gè)，于是我將protobuf生成php類庫(kù)文件的部分放到了一個(gè)公共的位置/data/php_proto/文件夾下，里面有這些內(nèi)容，

drwsrwxr-x 2 yanruitao users 4096 10月 14 17:05 Dmp
-rwxrwxr-x 1 yanruitao users  472 10月 10 17:59 dmp.proto
drwsrwxr-x 2 yanruitao users 4096 10月 10 17:54 ProtobufCompiler
-rwxrwxr-x 1 yanruitao users 2969 3月   9 2015 protoc-php.php

后面兩個(gè)是必須的，生成pb協(xié)議實(shí)現(xiàn)類庫(kù)文件時(shí)會(huì)用到，前面兩個(gè)是一個(gè)簡(jiǎn)單的例子，使用也很簡(jiǎn)單，就像下面這樣。

php protoc-php.php -n --psr dmp.proto //-n是使用命名空間，--psr是使用psr-4標(biāo)準(zhǔn)等同事用的時(shí)候發(fā)現(xiàn)會(huì)報(bào)錯(cuò)，

PHP Warning:  file_put_contents(pb_proto_dmp.php): failed to open stream: Permission denied in /data/php_proto/ProtobufCompiler/ProtobufParser.php on line 309

同事問我的時(shí)候我直接說，加上sudo就可以了，結(jié)果加上sudo問題更嚴(yán)重了，本來裝好的擴(kuò)展程序加載不成功，經(jīng)過一番排查發(fā)下有下面這么一個(gè)問題：

$yanruitao: php -i | grep 'php.ini'
$yanruitao: sudo php -i | grep 'php.ini'

兩種用戶加載的不是同一個(gè)配置文件，普通用戶加載的是/usr/local/php/lib/php.ini，而root用戶加載的是/etc/php.ini這個(gè)文件，我看了下這兩個(gè)文件內(nèi)容不一致，哈哈，好開心，趕緊把先把/etc/php.ini備份，/usr/local/php/lib/php.ini復(fù)制到/etc/php.ini，復(fù)制完了之后，我再使用的時(shí)候嚇我一跳，報(bào)了一大堆錯(cuò)誤:

PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/web_stub_cntl.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/web_stub_cntl.so: undefined symbol: zend_new_interned_string in Unknown on line 0

Warning: PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/web_stub_cntl.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/web_stub_cntl.so: undefined symbol: zend_new_interned_string in Unknown on line 0
PHP Warning:  PHP Startup: test: Unable to initialize module
Module compiled with module API=20100525
PHP    compiled with module API=20090626
These options need to match
 in Unknown on line 0

Warning: PHP Startup: test: Unable to initialize module
Module compiled with module API=20100525
PHP    compiled with module API=20090626
These options need to match
 in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/protobuf.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/protobuf.so: undefined symbol: zend_new_interned_string in Unknown on line 0

Warning: PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/protobuf.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/protobuf.so: undefined symbol: zend_new_interned_string in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/imagick.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/imagick.so: undefined symbol: zend_new_interned_string in Unknown on line 0

Warning: PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/imagick.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/imagick.so: undefined symbol: zend_new_interned_string in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/data/boss/phpredis-develop/modules/redis.so' - /data/boss/phpredis-develop/modules/redis.so: undefined symbol: zend_new_interned_string in Unknown on line 0

Warning: PHP Startup: Unable to load dynamic library '/data/boss/phpredis-develop/modules/redis.so' - /data/boss/phpredis-develop/modules/redis.so: undefined symbol: zend_new_interned_string in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/curl.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/curl.so: cannot open shared object file: No such file or directory in Unknown on line 0

Warning: PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/curl.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/curl.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/fileinfo.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/fileinfo.so: cannot open shared object file: No such file or directory in Unknown on line 0

Warning: PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/fileinfo.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/fileinfo.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/gd.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/gd.so: cannot open shared object file: No such file or directory in Unknown on line 0

Warning: PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/gd.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/gd.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/json.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/json.so: cannot open shared object file: No such file or directory in Unknown on line 0

Warning: PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/json.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/json.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/phar.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/phar.so: cannot open shared object file: No such file or directory in Unknown on line 0

Warning: PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/phar.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/phar.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/data/boss/phpredis-develop/modules/redis.so' - /data/boss/phpredis-develop/modules/redis.so: undefined symbol: zend_new_interned_string in Unknown on line 0

Warning: PHP Startup: Unable to load dynamic library '/data/boss/phpredis-develop/modules/redis.so' - /data/boss/phpredis-develop/modules/redis.so: undefined symbol: zend_new_interned_string in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/zip.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/zip.so: cannot open shared object file: No such file or directory in Unknown on line 0

Warning: PHP Startup: Unable to load dynamic library '/usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/zip.so' - /usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/zip.so: cannot open shared object file: No such file or directory in Unknown on line 0
protoc-php.php requires protobuf extension installed to run

這讓我摸不著頭腦了。

時(shí)間過去了好久，沒有發(fā)現(xiàn)任何突破，卻發(fā)現(xiàn)了一個(gè)備用的解決這個(gè)問題的方案，修改/data/php_proto/文件夾權(quán)限為0775，其他普通用戶就可以直接使用了，不用加sudo(這個(gè)是我的錯(cuò)，忘記修改文件夾權(quán)限了，這也讓我發(fā)現(xiàn)了這個(gè)詭異的問題)

chmod -R 0775 /data/php_proto
看了報(bào)的這些錯(cuò)誤，大部分都是擴(kuò)展的問題，有的是擴(kuò)展加載不成功，有的是擴(kuò)展不存在，我就納悶了，為什么普通用戶可以，root用戶就不可以。

看到root用戶php -i的時(shí)候，配置文件的地方跟非root用戶有不一致的地方：

//非root

Scan this dir for additional .ini files => (none)
Additional .ini files parsed => (none)

//root
Scan this dir for additional .ini files => /etc/php.d
Additional .ini files parsed => /etc/php.d/curl.ini,
......
命名加載的是一樣的配置文件怎么加載之后的內(nèi)容就不一樣呢？
搜了半天，知道了報(bào)的錯(cuò)里面有部分是跟這個(gè)有關(guān)系的，但是這個(gè)在哪里修改搜了老久也沒有搜到。

忽然想到root用戶和非root用戶使用的php可執(zhí)行文件是不一致的

root => /usr/bin/php
非root => /usr/local/bin/php

嘗試著對(duì)這兩個(gè)文件使用了php -v，結(jié)果下了我一跳，root用戶的版本是5.3.3，非root用戶是5.4.6，呵呵，我就呵呵了，誰部署的環(huán)境~，坑人啊。

嘗試著將原有/usr/bin/php備份后，復(fù)制/usr/local/bin/php過來覆蓋掉，在使用php -v發(fā)現(xiàn)版本一致了，也不報(bào)錯(cuò)了，再次去執(zhí)行php protoc-php.php -n --psr dmp.proto，發(fā)現(xiàn)all is well，至此問題解決。

糾結(jié)了半天，結(jié)果就是版本的問題。

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