Category Archives: php perl ruby

perl ldap start_tls Operations error

When i use php script to call perl script which will query the ldap , the perl function start_tls always return the error message “Operations error”, but it works well when call perl script directly with command line, it almost spent me a day to fix this problem, i finally found the root cause is that php process doesn’t have read permission to the cert/key file

chmod a+r /path/to/cert file

chmod a+r /path/to/key file

those two commands fixed the problem.

following code demo how php call perl:

$pipespec = array
    1 => array('pipe', 'w'), // client's stdout
    2 => array('pipe', 'w'), // client's stderr

$pipes = array();
$command = "/usr/bin/perl /path/to/perl/";
$process = proc_open($command, $pipespec, $pipes, $cwd, NULL);

Continue reading perl ldap start_tls Operations error


在xp上装了eclipse和VMware, 在VMware上装了redhat, 在redhat上装了apache,php,xdebug,在php.ini里配置xdebug如下:


然后在eclipse里设置断点,发现断点不起作用,直接所有的代码一次性运行完了,到xdebug官网仔细看了下配置的说明, 原来xdebug.remote_host并不是apache所在服务器的IP, 而是远程调试机的IP, 我的情况,也就是xp的ip, 而不是VMware上redhat的IP,可原来我却把xx.xx.xx.xx配成了redhat的IP, 修改xx.xx.xx.xx为xp的IP,重启apache, 一试,果然单步调试成功了。

zend studio打不开页面

今天想试一下zend studio, 在官方网下载好在win7下安装后,发现zend server其实就是apache, zend studio就是扩展了eclipse,但zend server/studio却还要收钱,真不知道是怎么遵守开源协议的。

创建一个test项目后,结果页面都打不开,返回的错误是这样的:Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator, and inform them of the time the error occurred, and anything you might have done that may have caused the error.

More information about this error may be available in the server error log.

花了不少时间看它们配置,发现配置都没什么问题,有点恼火啊,功夫不负有心人,原来这个文件Zend\ZendServer\etc\ZendEnablerConf.xml 第一行出现了乱码:锘??xml version=”1.0″ encoding=”UTF-8″?>
把它改为:<?xml 就行了

install_driver(Oracle) failed: Can’t load `…/DBD/Oracle/’ for module DBD::Oracle


This section is from the "Practical mod_perl " book, by Stas Bekman and Eric Cholet . Also available from Amazon: Practical mod_perl

Here’s an example of the full error report that you might see:

install_driver(Oracle) failed: Can't load
for module DBD::Oracle: cannot open shared object file:
No such file or directory at
/usr/lib/perl5/5.6.1/i386-linux/ line 169.
at (eval 27) line 3
Perhaps a required shared
library or dll isn't installed where expected at
/usr/local/apache/perl/ line 11

On BSD-style filesystems, LD_LIBRARY_PATH is not searched for setuid programs. If Apache is a setuid executable, you might receive this error. Therefore, the first solution is to explicitly load the library from the system-wide ldconfig configuration file:

panic# echo $ORACLE_HOME/lib >> /etc/
panic# ldconfig

Another solution to this problem is to modify the Makefile file (which is created when you run perl Makefile.PL ) as follows:

  1. Search for the line LD_RUN_PATH=

  2. Replace it with LD_RUN_PATH=my_oracle_home/lib

where my_oracle_home is, of course, the home path to your Oracle installation. In particular, the file should exist in the lib subdirectory.

Then just type make install , and all should go well.

Note that setting LD_RUN_PATH has the effect of hardcoding the path to my_oracle_home/lib in the file , which is generated by DBD::Oracle . This is an efficiency mechanism, so that at runtime it doesn’t have to search through LD_LIBRARY_PATH or the default directories used by ld.

For more information, see the ld manpage and the essay on LD_LIBRARY_PATH at .

Perl String Comparison Operators

In order to compare for string equality, or if one string is alphabetically bigger than another, you can use the six string comparison operators. Here are the string operators together with the numerical operators they correspond too:

String Operator Numerical Operator
eq ==
ne !=
gt >
lt <
ge >=
le <=

Notice that the string operators are built from the initials of their abbreviated names. (E.g: eq = equal, gt = greater than). Perl’s string comparison is case-sensitive. If you want a case insensitive string comparison, use the lc function to convert the strings to lowercase beforehand.