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The script downloads a file from the internet, processes it to create another file based on the original downloaded file, then deletes the original downloaded file.<br />

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The script downloads a file from the internet, processes it to create another file based on the original downloaded file, then deletes the original downloaded file.


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Dear Experts,<br />
<br />
I have a php page which uses the following line:<br />
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exec(&quot;sh script.sh&quot;, $retval);<br />
<br />
I have script.sh in the same directory as my php page, &nbsp;How do I make script.sh safe? &nbsp;What permissions should it be set too?<br />
<br />
Thanks<br />
ixf
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Dear Experts,

I have a php page which uses the following line:

exec("sh script.sh", $retval);

I have script.sh in the same directory as my php page,  How do I make script.sh safe?  What permissions should it be set too?

Thanks
ixf

php's exec function

The term 'shell' refers to a general class of text-based command interpreters most often associated with the UNIX and Linux operating systems. Popular shells include Bourne, Debian Almquist (dash), Korn (ksh), Bourne Again (bash) and the C shell family (csh). Some view the DOS 'cmd' prompt as a minimal shell of sorts. It is also possible to install Cygwin on Windows and emulate a full Unix environment with complete shell capabilities. Terminal emulators, such as xterm, GNOME Terminal and OS X Terminal, can be used to access shell.

Shell Scripting

Linux is a UNIX-like open source operating system with hundreds of distinct distributions, including: Fedora, openSUSE, Ubuntu, Debian, Slackware, Gentoo, CentOS, and Arch Linux. Linux is generally associated with web and database servers, but has become popular in many niche industries and applications.

Linux

PHP is a widely-used server-side scripting language especially suited for web development, powering tens of millions of sites from Facebook to personal WordPress blogs. PHP is often paired with the MySQL relational database, but includes support for most other mainstream databases. By utilizing different Server APIs, PHP can work on many different web servers as a server-side scripting language.