sed - PHP - How to do a string replace in a very large number of files? -

i have 2 million text files in server online accesible internet users. asked make change (a string replace operation) these files possible. thinking doing str_replace on every text file on server. however, don't want tie server , make unreachable internet users.

do think following idea?

<?php  ini_set('max_execution_time', 1000);   $path=realpath('/dir/'); $objects = new recursiveiteratoriterator(new recursivedirectoryiterator($path), recursiveiteratoriterator::self_first); foreach($objects $name => $object){    set_time_limit(100);   //do str_replace stuff on file } 

use find, xargs , sed shell, i.e.:

cd /dir  find . -type f -print0 | xargs -0 sed -i 's/old/new/g 

will search files recursively (hidden also) inside current dir , replace old new using sed.

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why -print0?

from man find:

if piping output of find program , there faintest possibility files searching might contain newline, should consider using '-print0' option instead of '-print'.

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why xargs ?

from man find:

the specified command run once each matched file.

that is, if there 2000 files in /dir, find ... -exec ... result in 2000 invocations of sed; whereas find ... | xargs ... invoke sed once or twice.