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I am trying to delete range of line numbers using sed command within php using exec command. I know how to use sed when substituting values directly within command.

exec("sed -i.bak -e '2d;12,17d;57d' $filename", $outputArray);

Note: the range will be chosen by the user and hence directly using the above command will not help me; it should be a variable.

For example, I want something like this:

<?php
$delete_from_line=35;
$delete_to_line=40;
exec("sed -i.bak -e "$delete_from_line,$delete_to_line" $filename", $outputArray);
?>
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3
  • Use command d to delete a line with sed. Commented Jan 7, 2017 at 9:59
  • @Cyrus have been trying to use d option with $variable but of no use , can you please be more elaborate ? Commented Jan 7, 2017 at 10:03
  • Please take a look at: What should I do when someone answers my question? Commented Jan 7, 2017 at 10:42

1 Answer 1

Reset to default
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Try this:

<?php
$delete_from_line=35;
$delete_to_line=40;
$filename="/path/to/your/file";

exec('sed -i.bak ' . $delete_from_line . ',' . $delete_to_line . 'd ' . $filename);
?>

See: http://php.net/manual/en/function.exec.php

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2
  • Thanks @Cyrus , that worked :) , but it works only when i execute with sudo php filename.php else if i just use php filename.php it throws couldn't open temporary file , permission denied Commented Jan 7, 2017 at 10:33
  • The user (apache, httpd ...) which runs your php code needs write permissions to the directory which contains the file you want to edit. Commented Jan 7, 2017 at 10:37

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