beginner question: how to execute unix command in PHP

From: Date: Tue, 23 Jul 2002 22:51:39 +0000
Subject: beginner question: how to execute unix command in PHP
Groups: php.dev 
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Hi, I'm just starting to learn PHP. I couldn't find how to exec unix command and read the result. Basically, I just want to execute "ls -lrt" and read and display the output. This may be very simple question, but for some reason, I couldn't find any info on executing unix command from PHP. Thanks. -Paul

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