PHP regex/search and replace multiline strings in multiple files

Question

I have several hundred .markdown files that I need to loop through and replace the following multiline strings:

---
---

I currently have the following code:

foreach (glob("*.markdown") as $filename)
{
    $file = file_get_contents($filename);
    file_put_contents($filename, preg_replace("/regexhere/","replacement",$file));
}

My question is, which regex do I need to remove the multi line strings in every file.

Thanks

@KristerAndersson Sorry I meant the regex to remove the multiline --- strings. I need to match and remove only the multiline --- because elsewhere in the file I have single --- which I need to keep — user2028856
– user2028856, Commented May 23, 2014 at 2:01
Sidenote: You may need to remove the http://localhost/ in foreach (glob("http://localhost/*.markdown") — Funk Forty Niner
– Funk Forty Niner, Commented May 23, 2014 at 2:04

Funk Forty Niner · Accepted Answer · 2014-05-23 02:31:07Z

2

this can be done faster with str_replace(), like so:

<?php
echo "<pre>";

$file="my file
is
this
---
---
goats";

echo str_replace("---\r\n---\r\n",'',$file);

which returns:

my file
is
this
goats

Live Demo: http://codepad.viper-7.com/p1Bant

line breaks can be \n or \r\n depending on os\software

edited May 23, 2014 at 2:31

Funk Forty Niner

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answered May 23, 2014 at 2:21

user557846

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1 Comment

Funk Forty Niner Over a year ago

Plus a demo; bonus. ;-)

D555 · Accepted Answer · 2014-05-23 02:59:12Z

2

If you really want to do it using Regular expression then you should try this::

echo "<pre>";

$file="my file
is---dfdf
this---
---
---
goats";

$res = preg_replace("/^---\r\n/m", "", $file);
// m at the end of line will match multiple line so even if you have --- on more than 2 lines it will work
echo $res;

Output will be::

my file
is---dfdf
this---
goats

answered May 23, 2014 at 2:59

D555

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1 Comment

D555 Over a year ago

@user2028856 try this if you want to use regex search replace

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