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Home/ Questions/Q 6782501
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Editorial Team
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Editorial Team
Asked: May 26, 20262026-05-26T16:44:58+00:00 2026-05-26T16:44:58+00:00

Looking for a PHP solution to: Perform ‘tail’ type shell command on a file

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Looking for a PHP solution to:

  1. Perform ‘tail’ type shell command on a file
  2. Perform ‘tac’ type shell command on a file

In other words, display the last lines of a file in reverse order, from last to first, like a log reader.

I just asked this question for Bash, hoping I could run a shell_exec(), but the recommended method – tac – doesn’t work on my OSX.

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  1. Editorial Team
    Editorial Team
    2026-05-26T16:44:59+00:00Added an answer on May 26, 2026 at 4:44 pm

    Take a look at http://php.net/manual/en/function.array-reverse.php

    A non-efficient way would be to fgets() the whole file into an array and then reverse it (Not good on big files).

    OR

    http://tekkie.flashbit.net/php/tail-functionality-in-php

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