In *nix, LD_LIBRARY_PATH is commonly a colon-separated list of directories. If you do not wish to clobber existing directories, you may want to either append or prepend a path: 
$ENV{LD_LIBRARY_PATH} .= ":/my/new/path";   # append
$ENV{LD_LIBRARY_PATH} = "/my/before/path:" . $ENV{LD_LIBRARY_PATH};   
+# prepend

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It is also a good practice to check if LD_LIBRARY_PATH is defined before doing this.

In reply to Re: Apache, no suexec, suid and the environment by toolic
in thread Apache, no suexec, suid and the environment by stefan k

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