在一台处理网络支付的服务器迁移的时候，发现不能支付。
1.PHP版本为5.3.3
2.系统为Red Hat 4.1.2-54
查看apache的错误日志，发现是加密文件中一个函数bcmul()报错：PHP Fatal error: Call to undefined function bcmul() in /php_rsa.php on line xxx ,这个函数是PHP数学扩展中的一个,使用 bcscale() 来设置全局默认的小数位数，具体用法如下：
- echo bcmul('1.34747474747', '35', 3);
- echo bcmul('2', '4');
- ?>
解决方法使用如下命令:yum install php-bcmath 就安装好了,如果出现下面这种情况：
Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: mirrors.yun-idc.com * extras: mirrors.yun-idc.com * rpmforge: ftp.riken.jp * updates: mirrors.yun-idc.com Setting up Install Process Resolving Dependencies --> Running transaction check ---> Package php-bcmath.x86_64 0:5.1.6-40.el5_9 set to be updated --> Processing Dependency: php-common = 5.1.6-40.el5_9 for package: php-bcmath --> Running transaction check ---> Package php-common.x86_64 0:5.1.6-40.el5_9 set to be updated --> Processing Conflict: php53-common conflicts php-common --> Finished Dependency Resolution php53-common-5.3.3-13.el5_9.1.x86_64 from installed has depsolving problems --> php53-common conflicts with php-common Error: php53-common conflicts with php-common You could try using --skip-broken to work around the problem You could try running: package-cleanup --problems package-cleanup --dupes rpm -Va --nofiles --nodigest
就需要使用yum update 之后再yum install php53-bcmath就好了,此函数在php.ini中的选项：
- [bcmath] ; Number of decimal digits for all bcmath functions. ; http:
- BC
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